How do you calibrate at infinity with Reikan? I have it and cannot find a way.Sigma Optimization Pro Software (version 1.0.0) This was my attempt to reach infinity (and beyond). Be interesting to see if N and C follow suit. I'll use this system for my 70-200 2.8 (Nikon) next, but I can see the appeal of the Sigma dock system now. I'm pretty happy now that the system is as good as I can get it. I don't think there is much wrong with the optimised lens, but with no additional MFA. So, here are two shots (maybe 10-15% crops of the full frame) post MFA, WITH the TC. I decided that I will take the advice here, and just see what I think about the TC with no additional adjustments. To be fair, FoCal warned me I was pushing my luck at 850mm for a 600mm lens! Now, the lens + TC is certainly not as bad as this would suggest, and it makes me think that the optimisation is really struggling with the TC (at f9 effective) although it grabbed focus well enough. Bizarre! It is exactly the same as last time. With the lens optimized, I added the TC1401. So, no adjustments for the camera, the lens now tuned to the body (a second hand D4S). If this is correct, then repeating the MFA with FoCal should now tell me the lenses are 'perfect'. I applied those two values to the lens as +16 ^m), +15 (15m) + 14 (inf) with mild extrapolation. I then went to the dock (not guilty, yr honour!). Frankly, I doubt +7 or +8 are discriminable - the curve is shallow at the top. The Nikon MFA values of +7 and +8 (identical to my previous values). I only optimized at 600mm - LR tells me that these types of lenses spent most of their time fully extended.Īgain, I found the FoCal software easy to use. I did not bother with 2.5m and don't see how to do 'infinity' (more later). Repeat the MFA from scratch, at 15m and 6m, and 1600 ISO (fairly typical for my birding exercises). I just adjusted those values from Reikan/Nikon to +20 on the dock, even though it should be more.Īs far as your TC-1401: I would take it and use it and see what real use results and images look like. But the dock allows for all the four different focal lengths. You could use the dock and the camera to adjust or just the camera. So anything over 10 on the scale get's thrown out with the dock. Problem with the dock is that it max's out at +/-20 on the scale. I even ran some of the tests twice to make sure (250mm was ran twice, same results). Sad that the dock will not allow you to MFA for two bodies. I also have the Sigma dock and supposedly there is a factor of 1:2 for adjusting: if Nikon says 5, Sigma should be set to 10. I MFA'd my Sigma 150-600 S on a D500 a few weeks ago using Reikan. Anyone else have experience of this system? I'm hoping this will translate into sharper pictures/more feather detail in our upcoming Florida trip. Lastly, I was pretty impressed by the software and the wealth of information it gives you. But, when I optimized with the default of 7 dialed in a) the lens alone still optimized at +8 (?) and the TC+ still failed to optimise at +20. I thought 'aha! If I set the default MFA to +8, then the addition of the TC should give me a leeway to +28. Although the system is now focusing at 'f9' the D4S never failed to acquire a focus though.Ģ. Maybe I should send the TC back and ask for a replacement? It clearly shifts focus a lot. With a 1.4 TC in place, could not find an optimal.ġ. I then added the TC1401, giving me 850mm fl. I also felt that the lens was working well at this value afterwards, though no shots yet that really confirm that. It was interesting to watch the process of optimisation - as a scientist - i found it very satisfying. I did the test at 1600ISO (to be realistic) and ended up with a recommended value of between +7 and +9:Įach symbol is a shot taken, quite a broad plateau around MFA of 8. Software was quite easy to fathom, and once the target was acquired and focus fixed, I first tried it on the 150-600 at f6.3. I had to wait for the sun to move and not part illuminate the target! Target (just visible) provided by FoCal, about 15m away, max I'd expect to get a decent shot of a smallish bird. OK, I tried this for the first time today:ĭ4S, coupled to my macbook (USB) semiautomatic mode (I needed to enter the MFA values)
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