AF speed SWD vs. screw?
In all the discussions about the limitations of Pentax' SWD driven lenses, I haven't gotten a clear idea of whether forcing them to work in screwdrive mode actually improves autofocus speed (which I suspect is the cause of the higher proportion of misfocused shots found in tests). Naively, I would expect that they would then operate at the same speeds typical of DA lenses - let's say the 60-250mm might work at speeds similar to the 50-200 or 55-300. I might be wrong...
Also, I understand that in the "consumer" DA SWD lenses (17-70,18-270), the screwdrive option is not available - is this correct?
No amount of perceived entitlement can replace actual expertise.
- 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%