Sima SLS-20 2x Telephoto Conversion Lens. The Sima SLS-20 2x Telephoto Conversion Lens is an accessory lens to supplement a camcorder or a digital camera.
Teleconverters have always been a mystery to me when I first started photography. It can magically double the focal length of any lens, thus magnify the image.
We got even closer by mounting both of my 1.4x and 2x teleconverters. ... Each lens has a tab for mounting. On auto lenses ... The tab on an auto lens is longer.
eyepiece to make telephoto lens into telescope - Camera Hacker
www.camerahacker.com › Forums › Dis...
I bought a Sunagor PATP 54038748 OP Telephoto lens adapter for my Canon Olympus telephoto lens with a 3 x converter. I don't know if they still make them ...