So I recently decided to purchase my first high-end camera/lens since my old Nikon F4 in the film days. I am now using a Nikon D810 and a Sigma 50mm f/1.4 Art lens.
According to DPReview/DXOMark, the Sigma lens is most sharp at f/2.8 (specifically at the center of the frame); however, I am finding the lens sharper at f/4 - f/11? I've taken various photos to compare, but I suppose my most reliable test would be when I placed my camera on a flat and hard table (to keep it perfectly still) and focused on a hardcover book about 1.5 meters away. I used the 10s timer to prevent camera shake from my pressing the shutter release. Higher f-stop photos were clearly sharper and with less magenta fringing.
Is someone able to shine some light on these findings for me?
- Canon EOS M58.8%
- Panasonic G85/G803.3%
- Panasonic FZ2500/FZ20001.9%
- Panasonic LX10/LX151.2%
- Panasonic GH5 development3.6%
- Sony a99 II15.9%
- Nikon KeyMission 170 and 801.0%
- Fujifilm GFX 50S development28.3%
- Olympus E-M1 II development18.7%
- Olympus E-PL80.1%
- Olympus 25mm F1.2 Pro1.5%
- Olympus 12-100mm F4 IS Pro1.9%
- Olympus 30mm F3.5 Macro0.1%
- Sigma 85mm F1.4 Art3.6%
- Sigma 12-24mm F4 Art2.6%
- Sigma 500mm F4 DG OS HSM Sport2.4%
- YI M12.2%
- GoPro Hero50.8%
- GoPro Karma drone2.2%
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