Re: Debating between Sigma 20mm / 24mm / 35mm Art
In case anyone cares, I thought I had my mind made up on the 20mm, and I ended up going with the 35mm.
What changed is that I have the 22mm f/2 for the EOS M now, so even with the larger aperture, the focal length was too close for it to give me anything different.
I just got the 35mm today and have been testing it with the 5D4.
First impressions, I tested it in the car while my girlfriend was driving. The AF was spot on, but everything was up close and in good light.
When I had a chance to use it in a bigger space at home, it severely front-focused. This is the first lens I've used with the 5D4 that required AFMA. I had to dial +20, which is a lot, but it AF's perfectly now. I tested it with various different things and the hit rate was pretty high. The weird thing is that due to the adjustment, anything closer than a few feet back-focuses now. I'm not reaching the MFD either, since the focus is slightly to the rear. Granted, this was in bad light and I was at ISO1250 f/1.4 1/50th, so I cut it some slack. I ordered the Sigma USB dock since I was some cushion with the camera's AFMA. I typically AFMA during an actual shoot since I never get repeatable results when I AFMA indoors and then shoot outside.
I only tested using the very outer AF points since it's what I normally use on a shoot. Center AF might have fared better, but it's rare that I use anything but outer AF points so I didn't bother testing with center AF.
I'm a little surprised that the 35mm Art is sharper than the 85mm Art, but I have no problem with that. I am pretty happy with the 85mm's sharpness, but this is something else.
I'm hoping the close focusing fares better in daylight. Even if I can't AF up close, I might just keep it since I'll use it more for environmental portraits and so far it's working perfectly for the distances that I usually shoot in.
The 20mm is still not out of the question in the future. It's just that I don't do enough video to justify buying a lens solely for that purpose. I might buy a 24-105mm STM in the meantime because I don't have a FF wide angle ever since I lost my 24-105mm L, and the STM motors are excellent for video.
Edit:
Took it out too shoot during the daylight and at +15, it worked fairly well except at, or close to MFD. It fared okay when shooting against a good amount of backlight during golden hour, but it missed some shots also. Again, this was with the outer AF points, so I'm not disappointed at that. It fared a little better than my 85mm does with backlight, so that's good enough for me since I could just do center AF if I really need to nail focus.
Got the dock. I had no idea you could AFMA for different distances. That pretty much solved the issue I was having and the 35mm works just as consistent as my 85mm now.
So far, I'm enjoying the lens. It's crazy sharp wide open and it has great contrast. I have the 30mm Art, which works well after AFMA with the dock but the improvement with the 35mm is significant.