12-24-2015, 11:34 AM
Quote:I made that PDAF vs CAF game last night and this night, after seeing a nice movie, again. How can I say? In no case the LiveView AF gave me a less good sharpness and in about 80% it was clearly better than PDAF. I didn't use LiveView often, partly to save battery and the long delay between shutter button down and picture stored. That will change now.
'Course this makes me think. "If its' so easy to miss sharpness wide open with normal AF, no matter how much this fast lens costs, no matter how much time I spent with adjusting that thing and if the LiveView of a DSLR always will be a crippled mirrorless, then why bother?". One can say, what do you expect form a third party lens? Answer: Well, LV didn't care about genuine or Sigma lens, it just nailed the focus better. If I get in the mood I'll make a sample gallery. How about those nightshots, Dave - did you compare focus with PDAF and CAF?
Well I've examined the photos and in evening light all was well, but as night set in and I stayed with the AF35mmF2D I started getting back-focus issues, the ambient light was of all possible colours, as one would expect at Chrismas time. The D750 I think seems to need -1/-2 with most lenses and the 35mm didn't have any MA, putting the AFMA to -2 might have helped though. All in all this not a sphere of imaging that shoot a lot of so, it's gone relatively unnoticed. I will try some night shots in town maybe quickly this evening to see if lens calibration will change things and compare it with the K01.
I did a couple of LV tests but it's so slow (next to useless) that with the thronging crowds I thought it better to try in similar light away from the melée.
However it has spurred me into getting a Hoodman on the D750, otherwise I absolutely cannot use LV, (glasses on/off every two seconds) I have a cheap magnetic one that is too small for the 3.2" screen but held away slightly, all the screen is visible, I need to make a fixing of some sort. I'm on the case!