Sam 500mm f6.3 Mirror - anyone?

Started Aug 9, 2012 | Discussions thread
OP dragra Senior Member • Posts: 1,140
Re: Rokinon 500mm f6.3 Mirror (6 imgs)

brandrx wrote:

how is focus confirmation working?

Sometimes it doesn't with this Rokinon. For instance, I could not get focus confirmation on the doves in the OP. Hoever, I believe that is because of the nature of those doves, being almost all gray and no contrast.

It seems to me that my Tamron SP 500mm f8 mirror works better than the Rokinon. I was able to do Catch-in-Focus (CIF) against the hummingbirds with my Tamron.

if I got you right focus confirmation is unreliable and depedning on subject contrast?
if the camera cant get focus confirmation also CIF most likely wont work?

thanks a lot for your post and links!


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