They both offer zoom function in the 70mm to 200mm range, f/2.8 wide-open aperture for low-light work, and provide super-quiet auto-focus operation with ...

The lens is very solid and sturdy, yet not very heavy. Focus ring has full throw, rather than the very short throws on zoom lens, which may be why AF is slow.

The Sigma 24-60mm F2.8 EX DG Lense is one of sigma's latest professional lens creations. Although simple in design, the overall lens offers a stunning array of ...

Nov 19, 2019 · That's a good question. In the past, you have the send the lens to Sigma to have the firmware updated. I don't know if there is anyway you can ...

A solid-built ultra wide-angle lens.

Apr 3, 2024 · Looking for a f/2.8 zoom lens in the range ... But seems that they are internal focus, but all of the have a front element that extends outward ...

Finally, I decided to disassemble it and try to fix it. I have always wanted to see the inside of a Canon EF lens anyway. Step 1: Unscrew the three tiny screws ...

so i was looking at these converters: quantaray 2x af tele-converter, sigma 2x tele-converter ex apo, and the canon extender ef 2x II. in that order because of ...

I was wondering why my M42 adapter on an old Chinon lens was not working with the teleconverter. Thank you! [C/\GE] Tue Oct 26 04:58:31 PDT 2004.

An extremely fast ultra wide-angle lens.