Are you trying to find portable slide projectors among various brands on the market but aren’t sure where to begin? To assist you in finding the right one, we’ve put together a list of the 7 best to help you pick the perfect one!
We investigated and evaluated a number of the top-selling portable slide projectors on the market in order to create our list of the best. Making a decision among the many options available is never simple. There are an infinite number of models available, each with a distinct price. And as you’ll find out, the best options aren’t usually the ones you imagine! This comparison is rich and relevant because of the numerous factors that were employed. You will find products featured in this ranking not only based on their pricing but also on their features and other customers reviews. To write this review, we completed 13 hours of research and did 43 portable slide projectors tests. You won’t need to pick products at random any more. If you’re unsure of what to look for, browse our list and consult the buying guide!
An overview of our top picks
Table of contents
The best portable slide projectors you can buy today
- 3X MAGINIFICATION GLASS SCREEN: Most slides and films are ultra-small, our Built-in Magnifier can magnify the image 3 times without Distortion, Blurriness or Loss of details, also Bright and Uniform Lighting, no color cast.
- PORTABLE: Suitable for 2x2" mounted slides (need to be inserted into the back of the viewer) and 35mm film and negatives. Convenient battery operation allows you to view old slides anywhere.(USB Cable power can also be used, USB cable is included)
- EASY TO USE: Desktop Portable Viewer with eject button and sliding tray for easy use in the studio or at home.
- ULTRA-BRIGHT BACKLIT LIGHT BOX: Large field of view, ultra-bright Daylight LED Lighting, presents images in vivid, crystal-clear details.
- REAPPEAR OLD MEMORIES OF LIFE: The personal slide viewer allows everyone to Memory the Past by Enlarging and Lighting 35mm slides, Films and Negatives.
- HOW TO EXIT SLIDES: Press the eject button for a few seconds until the slide exits completely. Bending slide and rapidly pressing and releasing the button may cause the slide to get stuck in the machine. When stuck, press the button tightly and shake the machine gently. If necessary, use tweezers to gently remove it.
- OLD MEMORIES COME TO LIFE – Personal Slide Viewer Provides a Glimpse Into the Past by Enlarging and Lighting 35MM Slides & Film Negatives for All to Enjoy
- POWERFUL BACKLIT LIGHT BOX – Large Viewing Area Features Ultra Bright Daylight LED Illumination to Render Images in Vivid, Crystal Clear Detail
- TRIPLE THE MAGNIFICATION – Since Most Slides & Films are Super Small, Our Built-In Magnifier Lens Enlarges Images by 3X Without Distortion, Blurriness or Loss of Detail
- JUST POP IN THE SLIDE TO SEE – Dedicated Slide Slot & Film Input Allow You to Load & Look in an Instant; Quick-Eject Button Removes Slide So You’re On to the Next!
- INCREDIBLE PORTABILITY – Convenient Battery Operation Lets You View Old Slides Anywhere in the World (Can also be DC powered, DC cables sold Separately)
- Personal Slide Viewer comes with a 3x magnification effect, which is convenient for you to use the film scanner to view the film. It adopts the upgraded center light-emitting technology to make the 35mm film receive even light, the color is more delicate, and the picture reproduction is high. Enjoy the benefits of Slides & Film Negatives fun of.
- Super Bright BACKLIT LIGHT BOX –The film and slide scanners use large field of view lenses, with 3X magnification function, the fluorescent light and mild light evenly illuminate the 35MM film, so that the 35 film can show every detail, the picture is more vivid and charming, and the transmittance is higher, the film is very Clear, nano-coated glass lens is not easy to oxidize, very durable and reliable.
- 3x Magnified Glass Screen – The newly upgraded film and slide scanner uses nano-coated glass lens, the light is heated evenly, the light transmittance is high, the image is real, the film image will not be deformed, and the color is very delicate and beautiful, and the upgraded glass material, more Sturdy and durable, not easy to damage, just to make your 35MM film reach a better display state.
- Pop-up in the slideshow to switch photos-equipped with a dedicated slideshow slot and film input, so you can load and view immediately; the quick pop-up button removes the slideshow and lets you enter the next photo，Fits 2X2" mounted slides and 35mm film strips and negatives.
- Convenient-- Desk Top Portable Viewer, Have Eject Button and Slide Tray,Use in Studio or at Home.(You can use DC cable or AA battery, DC cable and battery are given for free)
- [Reproduce your old memories] --- The personal slideshow viewer enlarges and lights up 35mm slides and film negatives for everyone to enjoy and experience the exquisite picture quality.
- [2x magnification glass screen]---This scanner uses a polymer glass screen, high-definition, translucent. Since most slides and films are very small, our built-in magnifying glass can magnify the image by 2 times without distortion , Blurred or missing details, easily and quickly view every detail of the film.
- [High-quality luminous box]---Large field of view, ultra-bright daylight LED lighting can present vivid, crystal clear and detailed images, perfectly showing the details of film photos.
- [Easy to use]---Desktop portable viewer, small in size, can be used when you put a film or tray from the side, suitable for use at home or when traveling, very convenient.
- [Small size]---The whole is only the size of a palm, especially suitable for outdoor photography. The shell is made of high-strength plastic, sturdy and durable, and the edge arc design is very comfortable to hold in the hand. It is suitable for 2X2" installation slides and 35 mm. Film and negatives.
- LED Slide Viewer - LED light with ON/OFF switch. Slide viewer for viewing old slides and 35 mm Film Negatives.
- 2X Magnification Glass Screen - DGODRT built-in magnifier magnifies the image by up to 2x without distortion, blurring or loss of detail, and the light is bright and even without color casts.
- Lightweight Portable Design - 210g light weight and small size, 12x8x7 cm (4.7''x3.2''x2.8''). Suitable for 2X2" mounted slides, 35mm film and negatives. It is very portable and can be used to view old slides in the office, at home or elsewhere.
- Easy to use - Desktop Portable Viewer. Install 2 AAA batteries (included), insert the slide and turn on the LED switch to activate the slide viewer.
- Package - Mini Slide Viewer *1, AAA Batteries*2 and User Manual*1, We will provide you with a one year warranty, if you have any questions, please feel free to contact us!
- Relive Beautiful Memories: DGODRT desktop portable slide viewer can enlarge and light up your old slides, 35mm film, negatives and 2X2" mounted slides on a viewing screen so you can enjoy those pictures with friends and family.
- 3X Magnification Glass Screen: Because your slide and film slips are very small, our slide viewer can enlarges images by 3X, without distortion, blurriness, or loss of detail.
- LED Lighted Illuminated: Our large viewing screen is a super bright LED bulb behind the glass observation zone, which can illuminate the image to show the greatest definition. It has a premium quality genuine glass lens that is crystal clear that allows you to capture all kinds of small details in slide and film slips.
- Quick view: Our product has a dedicated slide slot and film input slot so you can get a slide, insert it into the top slot and the picture will automatically appear on the viewing screen. Then you can press the button to switch the other slide so easy to view the next slide.
- Lightweight Portable Design: This duty mini slide viewer is very lightweight which is only 17.5oz (495g) weight, and the convenient USB powered or batteries operation lets you view slides anywhere in the world. (Note: Batteries Not included , USB Powered Cable Included)
- Relive Old Memories: TCNEWCL Slide and Film Viewer allows to enlarge and light 2X2" slides and 35mm film negatives. Relive the past moments with family and friends.
- 3X Magnification: With Built-In Magnifier Lens enlarges images by 3X magnification, we are able to view the small slide and film without distortion, blurriness or loss of detail.
- LED Bright Lighting: Viewing with LED Lighted Illuminated makes Images in vivid, crystal clear detail.
- Easy to use: Dedicated Slide Slot & Film Input are easy for you to load and look in an instant. Removes slide by Quick-Eject button on the side so you’re on to the next.
- Incredible Portability: No matter where you are, you can view on a Desk Top anytime. Battery or USB powered operation. (USB power Cable Included / But 4x AA Batteries NOT Included)
- PORTABLE & MOBILE PROJECTION: The projection screen stand is lightweight and durable, with a minimum height of 20-inches and a maximum height of 46-inches.
- HASSLE FREE SETUP: The digital projection screen is designed for simple setup with fold-out steel tripod legs and roll-up screen. Perfect for the home, office or classroom.
- NCREASED VIEWING: The white projection screen is made of a white 4.5mm matte fabric creating an optimal viewing surface. Also features a black masking border for increased image focus and alignment.
- VIVID & CLEAR IMAGE: The portable projector screen allows for vibrant image and video capture with a viewing size of 40-inches.
- UPGRADED FEATURES: The projector screen with stand features a manual auto-locking pull feature, making for easy set-up. The projector screen also features a 4:3 aspect ratio when folded.
- Glass Lens - Fits 2x2 mounted slides and 35mm film strips and negatives. (Please note: the 2x2 slides need to be inserted on the back of the viewer, see third product image)
- Portable - Use in Studio or at Home - Eject Button and Collection Tray. (Please note: Eject button will only work if slide is flat, if it is bent, even a little, it may get stuck and you will need to use a Tweezer)
- 3x Magnification Factor - Bright and Even Lighting, No Color Cast.
- optional DC 6V 500mA adapter (Not Included) - Uses Four AA Batteries (Included).
- Bundle Includes: Medalight Slide Viewer + Kodak 4-Pack AA Batteries + TheImagingWorld Micro Fiber Cleaning Cloth.
- DIGITALLY PRESERVE YOUR PRECIOUS MEMORIES. Immortalize your analog film and slides before they degrade to dust in your attic! This easy to use foldable film scanner let's you view, scan, convert and digitize old films and slides to your smartphone in just a few minutes.
- FOR ALL YOUR OLD PHOTOS. The K2 film scanner offers you the most inexpensive and easy to use way of scanning your old film straight to your smartphone. The K2 photo scanner is compatible with 35mm black & white, color positives, negatives and Color Slides. On top of that, this package comes with batteries, a cleaning cloth for your film and a magnetic plate for bigger phones.
- FREE APP. No more complicated scanners, paid subscriptions or expensive development services. With the KLIM Film Scanner app you have your own development service at home to digitize your film and slides with free to use apps. We include an easy-to-follow manual with detailed instructions on how to use our film scanning app.
- EASY TO USE. This portable device as easy to use and inexpensive as it gets! 1. Simply unfold the K2 film and slide scanner, 2. Turn on the LED light (batteries are included), 3. Insert your film or slides onto the mini projector 4. Place your phone on top, 5. Launch one of the listed apps in the manual and follow the steps on screen.
- MEMORIES WORTH KEEPING IS AN INVESTMENT WORTH MAKING. Think about it: how much is the content stored on that film worth to you? We made sure that whatever number you have in mind, is a lot higher than the price of the K2 Film scanner: a small investment worth making.
- BUILT TO LAST + WARRANTY. We're committed to using high quality components, built to last, so you can expect this product to stay with you for many years. If you were to ever encounter any problem, you're covered by our 5-year warranty. And if you don't like the product, you can return it within 30 days at no extra cost and receive a full refund. A completely risk-free purchase!
- ⚠️ IMPORTANT USE NOTE - the KLIM Film Scanner app offers flexibility with different camera angles to achieve the best scan results. Note that certain mobile phones may require a closer distance between the camera and film due to their focal length. To address this, we provide shorter brackets for easy installation.
- Personal Slide Viewer comes with a 3x magnification effect, which is convenient for you to use the film scanner to view the film. It adopts the upgraded center light-emitting technology to make the 35mm film receive even light, the color is more delicate, and the picture reproduction is high. Enjoy the benefits of Slides & Film Negatives fun of
- Super Bright BACKLIT LIGHT BOX –The film and slide scanners use large field of view lenses, with 3X magnification function, the fluorescent light and mild light evenly illuminate the 35MM film, so that the 35 film can show every detail, the picture is more vivid and charming, and the transmittance is higher, the film is very Clear, nano-coated glass lens is not easy to oxidize, very durable and reliable
- 3x Magnified Glass Screen – The newly upgraded film and slide scanner uses nano-coated glass lens, the light is heated evenly, the light transmittance is high, the image is real, the film image will not be deformed, and the color is very delicate and beautiful, and the upgraded glass material, more Sturdy and durable, not easy to damage, just to make your 35MM film reach a better display state
- Pop-up in the slideshow to switch photos-equipped with a dedicated slideshow slot and film input, so you can load and view immediately; the quick pop-up button removes the slideshow and lets you enter the next photo，Fits 2X2" mounted slides and 35mm film strips and negatives
- Convenient-- Desk Top Portable Viewer, Have Eject Button and Slide Tray,Use in Studio or at Home.(You can use DC cable or AA battery, DC cable and battery are given for free)
- REPRODUCE OLD MEMORIES TO LIFE – Personal Slide Viewer Provides a Glimpse Into the Past by Enlarging and Lighting 35MM Slides & Positive Film Negatives for All to Enjoy.
- SUPER BRIGHT BACKLIT LIGHT BOX – Large Viewing Area Ultra Bright Daylight LED Illumination to Represent Images in Vivid,Crystal Clear Detail
- 3X MAGNIFIED GLASS SCREEN – Most Slides & Films are Super Small, Our Built-In Magnifier Lens Enlarges Images by 3X Without Distortion, Blurriness or Loss of Detail
- Easy TO USE – Desk Top Portable Viewer, Have Eject Button and Slide Tray, Convient To Use in Studio or at Home.
- PORTABLE – Fits 2X2" mounted slides and 35mm film strips and negatives. Convenient Battery Operation Lets You View Old Slides Anywhere in the World (4AA Batteries Included)
- MINOLTA "View" 4-Inch (measured diagonally) Genuine Glass Lens Viewing Screen with Top loading 2"x2" Slide Insert. Use the View's side slots for viewing processed negatives.
- Quickly go through a very large number of old family slides or negatives to select those you wish to convert to digital photos. Minolta View is compatible with most 35mm & Super 35mm, 110, 126, 127 & 127 Super Slides in 2"x2" standard slide formats.
- With the MINOLTA View slide/film viewer, you can bring back to life all your treasured 2”x2” slides and processed negative film. Magnify your images 3x, all while not sacrificing any image quality.
- Brilliant 3X Magnification & Built-In LED Backlight Light Box. Using our intuitive input/output system, viewing all your slides and film is a breeze.
- Works plugged in or completely portable with batteries. Powered by "INCLUDED" USB AC Adapter & Cable (Worldwide Voltage 110V/240V) & 3-Piece International Power Adapter Plugs. Either plugged in via the included worldwide AC adapter & wall plug adapters, or with 4 AA batteries (not included), you can virtually use the MINOLTA View anywhere.
- Lens not included with projector
- Remote forward and reverse
- Improved corner-to-center illumination
- Long-life lamp
- Built-in handle, accessory outlet
- Projector Screen Size: 50-Inch diagonal, 1: 1 Aspect Ratio. View size: 35. 0" H x 35. 5" W. Overall size: 48. 8" H x 36. 2" W. (Model: T50SW)
- Screen Material: MaxWhite; A 8K / 4K Ultra HD and Active 3D Ready FRONT Projection Screen Material featuring a 180 Viewing Angle and 1. 0 Gain. Fully Black Backed and Easy to Clean Surface. Greengard and Greengard GOLD,.
- Ultra-lightweight starting at just 5. 7 lbs. , is much lighter and ideal for road warriors and presentations to go.
- The material is detachable for either free-standing tripod or wall presentations.
- [US Based Company Warranty] 2-Year Manufacturer Warranty (*if purchased NEW) by Elite Screens' an ISO9001 manufacturer since 2004 and Lifetime Tech Support by Email, Web Chat, or Toll-Free Phone Call by Elite's Professional Service Team. 3-Year ENR-G Manufactures Warranty* for any Educational, Non-profit, Religious or Government and Military purchases.
- PORTABLE & MOBILE PROJECTION: The projection screen stand is lightweight and designed for quick setup, making it perfect for travel. The retractable design makes it convenient for presentations on the go.
- HASSLE FREE SETUP: The digital projection screen is designed for simple setup and universal projection and portability. Perfect for the home, office, or classroom.
- RUGGED DESIGN: The light projector screen is designed to be heavy duty and sturdy and is both stain resistant and made of flame retardant fabric.
- FIRST RATE VIEWING: The white projection screen is made of a premium matte fabric creating an optimal viewing surface. Also features a black masking border for increased image focus and alignment.
- VERSATILE SET UP: The video projector screen was designed to stand on any flat floor surface or table, creating a myriad of options for placement. Great for outdoor movies, indoor viewing parties, as well as presentations in the classroom and office.
- 💖【Upgraded Viewing Experience & High Brightness】 The XuanPad upgrade projector adopts advanced LED light source and LCD display technology, providing 12000L high brightness and supporting high-definition image quality of Full HD 1080p for an excellent visual experience. The latest NTSC color technology and advanced image edge processing algorithm accurately restore every detail on the screen, bringing wonderful visual enjoyment.
- 💖【Immersive Projection Size & Long Lamp Life】 The XuanPad projector has a projection size of 30 to 200 inches and a projection distance of 1m to 5m. With an extra-large projection size of 200 inches, you can enjoy a immersive viewing experience and share great moments of movies, games, and sports events with family and friends. The powerful heat dissipation system effectively extends the lamp's life to 55,000 hours, and allows you to enjoy entertainment for a longer time.
- 💖【 Noise Reducing & Zoom function】 Advanced noise-reduction technology reduces fan noise by 80%, ensuring crystal-clear sound quality from the built-in dual stereo speakers. With T-shaped correction and 50% zoom function, you can adjust the screen size from 50% to 100%, ensuring perfect image projection and the best viewing effect. Note: When you reduce the screen size, the video screen size also decreases, but the main screen and settings screen size remain unchanged.
- 💖【Wide Compatibility and Multifunctionality】 Our mini projector has multi-device connectivity and is widely compatible with various smart devices such as smartphones, laptops, tablets, U disks, TV boxes, and game consoles. Connect your favorite device anytime, anywhere and enjoy a diverse entertainment experience. When connect with phone, an extra HDMI adapter (Not Included) is needed. Due to copyright of Apps, Netflix, Prime Video, Hulu, etc. can only play via TV Stick, Roku, etc.
- 💖【Excellent Service & 2 Year Guarantee】 The XuanPad projector team strives to provide high quality service and satisfied after-sales protection. If you encounter any issues, please feel free to contact us. We also offer a 2 year warranty for your peace of mind. PowerPoint and business presentations are not recommended. This is a home projector. This portable projector weighs only 1.45KG, will be an unforgettable gift for your family and friends.
- Lightweight and Detachable tripod:Projector screen stand is very durable, making it not easy to bend, deform, and break. The stand is not only beautiful but also lightweight. The projection screen will come with ground stakes,ropes and sandbags which make it to sturdy enough to be used in outdoor.
- Wrinkle-Free Movie Screen: 100 inch projector screen, 16:9 format,160° Wide Viewing Angle. screen for projector is made of polyester milk silk, thicker than other ordinary screens. but not see through.The movie projector screen is foldable, washable and soft, so it is very easy to clean from stains.Thick and Wrinkle-Free design giving you more fun, even support FRONT and REAR projection.
- Easy to Assemble and Disassemble: outdoor projector screen comes with an instruction manual to quickly set up and get started in just a few steps. Very quick and easy. Detachable crossbar can be assembled easily with no tools required, and the tripod can be opened quickly. Great for rapidly transferring places with less time.
- Easy to Carry: Portable projector screen can be packed in the included carry bag, easily transported, and is well protected.You only need one hand to lift the 7.4 pounds screen for projector and carry it anywhere you want to go to start your movie journey.Its portability allows it to be widely used for various activities outdoors or indoors, perfect for home, camping, school, office, wedding, church, etc.
- Professional After-sales Service: The projector screen and stand come with all necessary tools (projection screen, tripod, carry bag, and other accessories) . We focus on your shopping experience. If you have any problem with our projector screen with tripod, please feel free to contact us and we will make every effort to solve it for you quickly.
![[UL Listed] 6Ft 2 Prong Projector Power Cord Compatible DR. J Professional HI-04 Mini / 4500L Mini / 3600 Brightness Projector, Canon NEC Kodak SlideProjector, DeepLee DP36 / PowerLite Projector](https://m.media-amazon.com/images/I/41bVHzSppyL.jpg "The 8 Best portable slide projectors of %currentyear% 46")
- Compatible With: NEC Canon Dell KODAK Slide Projector.
- Compatible: DR. J Professional HI-04 Mini / 4500L Mini / 3600 Brightness / 6500Lumens Projector, PowerLite S1 S3 / 1700c Projector, DeepLee DP36 Mini / DBPOWER T22 Projector
- Power Cord Type: 2-Slot, 18 AWG x 2C, 250V 10A.
- UL Listed/ Safety: UL Certified Power Cord, Giving You Much More Safety Guarantee While Using It.
- Power Cord Length: 6FT.
- High Quality 2 Prong Power Cord, Life Time Warranty and Customer Support.
How to choose a good portable slide projectors
Does the idea of finding a fantastic portable slide projectors make you anxious? When it comes to purchasing this product, specifically when deciding which model to select, has your head been spinning between options? You are not alone if that is the case. We are aware of the pressure involved in the purchasing process!
Your presence here indicates that you are interested in portable slide projectors. Before choosing which product would be the best for your needs after being inundated with information, locate a reliable source with genuine selections. You can get that information from a variety of sources, including buying guides and rating websites, word-of-mouth recommendations from friends and family, online discussion forums where users can share their own experiences, product reviews that can be found all over the internet, and YouTube channels. You can only get the right product through exhaustive analysis. But you realize that’s not always simple. In order to ease your concerns, we have taken the time to develop a list of the top portable slide projectors products available right now. You might be wondering how we came up with the list. How was this buying guide developed?
First, we used our algorithms to gather as much reliable data as we could about these products. To verify all the data gathered, we used both artificial intelligence and a lot of algorithms.
Then, our experts used criteria that are recognized in the business to evaluate them according to their quality to price ratio, allowing us to choose the top portable slide projectors on the market right now!
The selection of the goods is not arbitrary. Before creating a list, we take into account a number of factors. Below are some of the criteria discussed:
Brand Value: What happens if you choose a dubious brand just because it appears to be a good deal? So the likelihood of receiving a product with a short shelf life increases. That is due to the fact that well-known brands have a reputation to uphold, while others do not. Top portable slide projectors brands strive to provide some distinctive traits that set them apart from the competition. So, hopefully one or more of the items on our list will be perfect for you.
Features: Useful features are all you need, not tons of them. We consider the important aspects and select the top portable slide projectors based on those.
Specifications: Numbers always help you measure the quality of a product in a quantitative way. We try to find products with higher specifications, but with the right balance.
Quality: A product’s quality may always be quantified with the aid of numbers. We look for goods with better standards that strike the proper balance. The best quality product that gets highly appreciated and recommended by experienced users.
Customer ratings: Would it be accurate to suggest that the portable slide projectors were used by hundreds of customers before you? Superior ratings indicate that many customers had better service.
Customer Reviews: Like ratings, provide you with accurate and reliable information about the product from genuine customers. Customer ratings are very important to all of us because they contain accurate and reliable information about the customer service we received from several hundred customers.
Seller Rank: This is very intriguing! Not only do you need a good portable slide projectors, you also need a product with rising sales that is trendy. It accomplishes two goals. First, the expanding user base proves the quality of the product. Second, given that number, producers must be able to offer greater quality and after-sales support.
Value: You get what you pay for, they say, so consider the value. Cheap isn’t always good and expensive isn’t always bad. However, that does not imply that spending a lot of money on a product that is flashy but underwhelming is a good idea. Before adding them to the list, we make an effort to evaluate how much value you can get for your money from your portable slide projectors.
Durability: Durability and reliability are closely related concepts. You will benefit from a strong and long-lasting portable slide projectors for months and years to come.
Product availability: Products come and go, and new ones replace the old ones. Most likely, a few new features and required changes were made. What use is it to use a supposedly good product if the maker no longer supports it? We make an effort to highlight products that are current and offered by one or more trustworthy sellers, if not more.
Negative Reviews: Yes, we do take that into account as well! The goods with the majority of bad reviews are filtered out and disregarded when we choose the best-rated one on the market.
These are the standards by which we selected our portable slide projectors. Do we end our process there? Hell no. The most crucial fact about us that you should be aware of is that we regularly update our website with current and pertinent information. We have one more layer of filtration since we place the greatest importance on reader satisfaction. Please let us know if any product included here is incorrect, irrelevant, subpar, or simply out of date. We always value your opinions, and we’ll work hard to make any necessary corrections to our list in response to them.
Why should you believe us?
There are now thousands of possibilities for these products on Amazon, but choosing the best one can be difficult and time-consuming. And what portable slide projectors should you purchase in 2022?
This guide is the result of more than 10 years of experience in researching, testing and writing about many topics. Each member of our team is an authority in their area. We read every article we could find online and every consumer review on every retail website for seven hours. Additionally, we discovered a ton of websites that offered helpful resources, including buying tips and thorough information on portable slide projectors.
