Matt Grum Offline Upload & Sell: Off
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chrisgibbs wrote:
Looks like Sony's way of dealing with dreaded focus-shift. Focus-shift made the Canon 50L on the 5D3 shot @f/2 basically no-go.
EDIT: So this begs the question. Is the FE 1.8/55 free of focus-shift issues, where the GM's aren't?
Not sure I believe focus shift is the reason. I can't imagine the new 50mm f/1.4 has more spherical aberration than the 55mm. And focus shift should not be a problem at f/11! I think there's some other technical reason / oversight behind this behaviour.
arduluth wrote:
Just curious if the light was low when you noticed that the 55mm open up during focusing?
With my Sony lenses (FE 28/2, E 16/2.8, E 35/1.8), the pattern I've noticed if you have Setting Effect On is that the aperture does*not* open up during focusing if the light is sufficient. However, if the light is lower the camera will open up for focusing and the nstop down again.
I think it depends on the camera, the A7R (with setting effect on) would only open the aperture to focus a little bit in extreme low light. The A7RII will open up even in good light - presumably to make use of phase detect AF.
GMPhotography wrote:
Some view it as bad but I have not run into where it actually affected me.
From what I've read here is seems like the new GM lenses + 50 f/1.4ZA are always at the shooting aperture regardless of "setting effect". If that is the case then it makes these lenses pretty much unusable when shooting with strobes, if you have the body set to f/8 or f/11 indoors you're going to get a very slow, jerky, noisy viewfinder image.
That is really bad for furthering the idea that mirrorless bodies are ready for professional use, as optical viewfinders don't have this problem at all.
Edited on Apr 11, 2017 at 05:06 AM · View previous versions
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