11-28-2015, 06:54 PM
Well, if you do it with the dock, there are already 16 combinations. And wether needed or not, at least I want to check how good the lens and the camera's AF are working together. It' snot only Sigma who can crash that game. The fact most lenses only have one AFMA setting plus the other fact that AFMA adjusts a lens only to the particular distance you're testing it doesn't mean the Sigmas need more care than others.
I found that the combination D810 (freshly serviced) behind the 150-600 with TC 1401 needed sometimes more than -25. Which is not possible without the dock. I know how precise my Sigmas are after adjusting them with the dock. I don't run comparison tables for Nikkor keeper rate vs. Sigma because to me it's pointless. Too different the lenses, too different the subjects I use them for. The more I look into that AFMA business, the more I recognise there's also some luck involved. And the more I try to adjust the lenses the more I think I'd love to spend this long hours with something else. Hell, even taking photos...
I'd love to have a camera which doesn't need all this ado to correct the indirect focussing. Which may be fast, but also inaccurate. In most cases less fast lenses compensate with their large DoF the inaccuracies. But having slightly more expensive fast glass, I want to see accurate focus. And that's where's my frustration at times comes from. LiveView would be mor accurate, but it takes so much time it's pointless to use AF lenses - unless the body is already mirrorless. Oh, and since you asked: I'm still thinking of trying one of the Sony A7 types. My colleague just got one A7RII and I'm curious to hear his latest comments when I'm coming back from holidays.
I found that the combination D810 (freshly serviced) behind the 150-600 with TC 1401 needed sometimes more than -25. Which is not possible without the dock. I know how precise my Sigmas are after adjusting them with the dock. I don't run comparison tables for Nikkor keeper rate vs. Sigma because to me it's pointless. Too different the lenses, too different the subjects I use them for. The more I look into that AFMA business, the more I recognise there's also some luck involved. And the more I try to adjust the lenses the more I think I'd love to spend this long hours with something else. Hell, even taking photos...
I'd love to have a camera which doesn't need all this ado to correct the indirect focussing. Which may be fast, but also inaccurate. In most cases less fast lenses compensate with their large DoF the inaccuracies. But having slightly more expensive fast glass, I want to see accurate focus. And that's where's my frustration at times comes from. LiveView would be mor accurate, but it takes so much time it's pointless to use AF lenses - unless the body is already mirrorless. Oh, and since you asked: I'm still thinking of trying one of the Sony A7 types. My colleague just got one A7RII and I'm curious to hear his latest comments when I'm coming back from holidays.