New answers tagged

1

Extension tubes, so long as they make electrical connection, affect nothing except the amount of light that actually reaches the camera sensor. They have no influence on anything other than the focussing distance. Because of that, yes, 68 mm of extension tube will get you very very close indeed on a 50mm lens, in fact I've found 50mm to be about the break-...


-1

It is weird because Sigma either make lenses whose firmware can be updated by the user or makes lenses using the lowest common denominator (in protocols) of the camera manufacturer. And also Nikon, I would say always carries over the protocols from the oldest camera/lenses to the new bodies (backwards compatibility). One of the things that differentiates ...


2

The Sigma 10-20mm 1:4-5.6 EX DC HSM is a design introduced in 2005. Your Nikon D7100 was introduced in 2013. Thus, Sigma had no way to test the design of that lens to see if it would work with the D7100. This is all based upon the way that third party lens makers design lenses for other manufacturers' cameras. They do not usually license technology from ...


Top 50 recent answers are included