Flat plastic Fresnel lens. This flexible magnifier is 7-1/4" x 10-1/4" and only about a millimeter thick. It is great when you need to scan a list or to look for something in a directory. You can see most of the page without moving the magnifier. Only about 1.5 power, but that can make a huge visual difference. The quality is not high, but neither is the price.

Treat yourself to an assortment of our finest negative meniscus lenses in sizes between 14mm and 52mm with focus lengths between -29.7mm and -169mm. Negative meniscus lenses spread light instead of concentrating it, so they're sort of de-magnifying glasses. (Perfect for reading if your vision is too good.) You get (4) lenses in each of (5) sizes for (20) total.

Thick, but very desirable, like a nice fat slice of salami, these negative meniscus glass lenses are 55mm dia with a focal length of -169mm (think: reduction). Great for artists and crafters. Edges might have some slight chips, but that's surplus for you.

These 9mm dia  plano-convex (PCx)glass lenses have an appx. 154mm focal length, and are perfect for arts and crafts projects, or for making the worlds tiniest telescope. May have a few small chips but we will sort them as best as we can. Call about larger quantity discounts!

Great little glass DCX lenses for all of your project needs.  Utilize their 48.3mm focal lengths for all classroom projects, or combine these with other lenses to build binoculars, magnifiers, microscopes and telescopes. These are seconds so may have small chips.

Nothing is certain except death, taxes and smudges. Take care of at least one with these lens-cleaning kits. They include a 7”-square lens cloth, (5) double-headed swabs, and a 1-oz vial of ammonia-based cleaning fluid in a spritz bottle.

This achromatic doublet lens (them what won't distort color or shape any more than they absolutely have to) is in an oval metal mount with a small mounting hole opposite a set of prongs. Originally a projector lens of some sort, it measures 20mm dia (approx 3/4") with a 47mm (approx 1-7/8") focal length. Despite the fact that you could mount it in its current mounting using the mounting hole, we suspect you're just going to use it as a nice 5X loupe.

A beautiful glass achromat lens. 34mm diameter and 66mm focal length. If you're In need of a lens for an art project or DIY magnifier, this is the lens for you. These are old military surplus so we have a limited quantity. Get yours today!

One of those clear plastic jobs that goes over an automotive light or some such. It provides a bit of focusing to strengthen the beam and some protection, but isn't really an optical element. This one is 2-7/8" sq. x 9/16" thick. Actually, the plastic is only about 1/8" thick, but there is a rim to the rear which gives it overall depth. Good protection for outdoor lights. Could be set in the outhouse door to admit distorted light. Or flip it over and serve nuts in it.

And more. This accessory kit for smart phones (works with iPhone, Samsung, HTC, iPad, tablets and many others) has a 2” long clip-on bracket with screw-in macro, wide-angle and fish-eye lenses. Paul loves his kit and he’s our optics expert. Use the macro for insects, coins and diamonds. Fish-eye and wide-angle for great visual effects. Includes a little pouch to carry it all in, and tiny lens caps.

Note: Two lenses come threaded together to conserve space. 

20mm DOUBLE CONCAVE (DCV) LENS, DCV-K9, D20-2-AR, WITH HOLE Material: H-K9-L, 20mm , w/ hole. AR coated for 150-850 nm. 248-D 110184-2 *Available in-store as special order only, please call.

42mm x 13mm (34mm VIEWABLE) MOUNTED NEGATIVE MENISCUS LENS Units are in varying condition and date back to the 1970s. Most are in excellent condition. Some may have a bit of dust or require some minor cleaning. Acts as a reducing lens wide angle. Fixed focal length. Fish-eye effect.

*Available in-store by special order only, please call.