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Forum: Pentax K-3 & K-3 II
10-01-2017, 03:10 PM
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This work well and is a non issue. On the opposite, if you were to post process your raws with a good software like DxO prime, you'd get at least 2 stops more. This is more significant than 1/20s vs 1/30s that is about 0.5 stop, not a huge difference if you ask me.
Also, the bigger APS-C sensor "that have limitations" actually perform much better than the m4/3 ones, more actually than the pure physics would indicate. Except if you have an M1-II, you are already getting 1-1.5 stop more from the sensor than on m4/3. This isn't to be overlooked. Typically the pictures at base isos 200 on my father pana in JPEG look comparable to the iso 800 shots on the K3. And there no real iso 100 on these bodies.
For many shooting opportunities even with a tripod going to low isn't the best idea. So while SR is useful, a small difference in performance between bodies isn't that relevant. It isn't like anybody would get the 5 second shot on the pana.
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Forum: Pentax K-3 & K-3 II
10-01-2017, 02:49 PM
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I would use the 1/(2x focal length) FF equivalent as a safe value when shooting without SR... With SR, the safe value is more 2/(focal length) at least, giving a comfortable 2 stops.
For sure I got shots at 1/15s with my FA77 with K3 and that look like 4 stops. But in reality the shoot was sharp, not pixel sharp and also I made an effort on my side to be stable. Even without SR, if you make an effort, you may very well manage 1/60 meaning that still really 2 stops you are really getting.
Still 2 practical stops is huge. I heard that the Fuji people using their 90mm f/2 need 1/250 or 1/320 to get sharp results. That is annoying in low light to not be able to use 1/80 - 1/125 at least.
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