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  • Size: about 20cm x 26cm (L * H ) - sites.google.com

    10pcs Pink Color Earpicks Two Ends Wax Curette Remover Cleaner Pro Plastic Earpick Ear Care Tool For Cleaning Device Dig Ear. ... Retro Optical Clear Lens Eye Glasses Frames For Men High Quality #165# ... Adjustable Flexible Gear Ring Belt w/Hand For DSLR Camera Follow Focus Zoom Lens lens size 49mm 52mm 55mm 58mm 62mm 67mm 72mm.

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    Adjustable Flexible Gear Ring Belt w/Hand For DSLR Camera Follow Focus Zoom Lens lens size 49mm 52mm 55mm 58mm 62mm 67mm 72mm Adroit Portable 2.4G Wireless Optical Mouse Mice For Computer PC Laptop Gamer JAN12

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  • Camera Accessories

    52mm to 48mm Step-Down Ring allows use of 48mm threaded accessories on 52mm diameter lenses. Boxed as new. $8.00 #28779. Tiffen 52mm-62mm Step-Up Ring Allows use of 62mm filters etc. on 52mm front-diameter lens. EX. $10.00 #28780. HCE 52mm Color Correction Filter 82-A EX $8.00 #31026. 52mm Color Correction Filter 85 Generic; boxed as new

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  • Camera Accessories

    52mm to 48mm Step-Down Ring allows use of 48mm threaded accessories on 52mm diameter lenses. Boxed as new. $8.00 #28779. Tiffen 52mm-62mm Step-Up Ring Allows use of 62mm filters etc. on 52mm front-diameter lens. EX. $10.00 #28780. HCE 52mm Color Correction Filter 82-A EX $8.00 #31026. 52mm Color Correction Filter 85 Generic; boxed as new

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  • Simple methods for close-up stereo photography. - Lock Haven

    Simple methods for close-up stereo photography. ... If two lenses are used you'll want each to have a diameter of about 52mm. This trick of using a lens off-center for axis convergence was used in the old viewers for stereo view cards in the Victorian era. ... Be sure you get optical glass not plastic. Or if you just want to try the method ...

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  • BOBOVR Z6 VR Glasses With Headset Shop For Gamers ...

    IMAX theater panoramic surround sound: compatible with 4.7 to 6.2 inch (full screen 6.5 inches) size Android or IOS mobile phone independent sound card drive 50mm large diaphragm headphone unit accurately restore the sound position and movement tracking aspherical high The lens achieves an IMAX cinema effect. 2.

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  • cheap optical lenses. Learning by Simulations: Optical Lens

    In the past eyeglass lenses had always been made with glass. With the advent of high quality plastics in the last 20 years glass lenses have been replaced almost completely with plastic lenses. Glass lenses have a slightly better optical clarity than plastic lenses and do not scratch as easily.

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  • Pmma Lens manufacturers China Pmma Lens suppliers ...

    Find Pmma Lens manufacturers and suppliers from China. Source high quality Pmma Lens supplied by verified and experienced manufacturers. Contact reliable exporters of Pmma Lens across China at …

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  • Building an optics bench Physics Forums

    I was trying a projector with a picture drawn on a clear piece of plastic and the projector is too bright and kind of unfeasible to use anyway. Next I tried an LED flashlight which isn't quite bright enough especially for using in a well lit room. 4. Am I right in thinking the diameter of the lens doesn't affect the focal length?

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  • Experiment: can an aspherical lense be substituted with a ...

    ive tried a 500x500 mm overhead projector lens.....but the results were disappointing same with a brandnew biconvex 120mm glas lens it did only throw ~10% more than the KD lens but with a much smaller die -----> i guess the reflections from the backside caused the loss of light because i nearly got blinded by it

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  • How to make your own objective solar filter - AstroSolar.com

    How to make your own objective solar filter for your camera ... The inner diameter should match the full aperture of the objective lens the outer diameter should be 10cm (~4″) larger. ... AstroSolar Film must not be put under tension in order to retain its precision optical property. Hold one cardboard ring ...

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  • How to Make a Telescope (with Pictures) - wikiHow

    Lenses should be a different focal length. For best results get a concave-convex lens with a diameter of 49 mm and a focal length of 1 350 mm and a plano-concave lens with a diameter of 49 mm and a focal length of 152 mm. It's very easy to order lenses off the internet and they aren't very expensive. You can get the pair of lenses for about $16.

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  • Building a Homemade Telescope

    One Smaller Concave or convex lens – a convex lens will give you the same view but turn everything upside down. Concave lens at Amazon. One long cardboard tube or 2 cardboard tubes in which one fits snugly inside the other – Old wrapping paper tubes are great for this. A piece of thick cardboard – one that has the ridged bit in the middle

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  • Optics MISUMI Thailand

    Optics (Automation Components) for industrial applications. MISUMI has 2600 brands 9 millions products of Automation Components Fastners and Materials. MISUMI offers free CAD downloads No MOQ with short lead times. You can order only 1 piece with No delivery charge.

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  • How do binoculars work? - Explain that Stuff

    A lens is a curved piece of glass shaped a bit like a lentil. (If you ever wondered where a lens gets it name from that's where: lens comes from the Latin word for lentil.) When light rays hit a glass lens they slow down and bend. If the lens curves like a lentil (like a dome) so its outside is thinner than its middle it's called a convex ...

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  • camera lenses - Nikon Filters Nikon Filters

    A camera lens (also known as photographic lens or photographic objective) is an optical lens or assembly of lenses used in conjunction with a camera body and mechanism to make images of objects either on photographic film or on other media capable of storing an image chemically or electronically.. There is no major difference in principle between a lens used for a still camera a video camera ...

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