Explains the purpose of stacking teleconverters and how to calculating focal length, aperture, and aperture diameter.

Oct 4, 1999 · With a perfect converter 2x you increase by 4 the surface of smallest blurring so if your lens is only quite good, you will just increase the ...

The camera monitors a switch on the lens mount. Each lens has a tab for mounting. On auto lenses, the tab is longer, thus triggering the switch. The tab is ...

i had just tried this evening using my new 1.4 teleconverter with EOS cameras attached to my scope and couldn't get the camera to work except with the ...

These teleconverters include front and rear lens caps, lens pouch, and instruction manual. The C-210 model even comes with a built-in lens hood that snaps into ...

The 1.45x teleconverter clips onto a 46mm filter thread much like a lens cap. Mine came with a 43mm-46mm step-up ring for my Olympus C-2500L camera. The front ...

Olympus 1.45x Tele Conversion Lens produced this image. The magnification looks identical to the Olympus C-160 1.45x H.Q. Converter below.

i have recently bought a canon eos xti dig camera. i enjoy taking action pics, but only as fun. i also got the ef 75-300mm f/4-5.6 III lens with it. my main ...

HI, your "Stacking Teleconverters" write-up was pretty enlightening..... I am looking for a 2x TC for my VIVITAR 70-210mm zoom lens.....Could you help me choose ...