What I experienced while using the K1 for over a year: From 1/200th and higher, there is not difference in sharpness between images captured with EFCS and mechanical shutter. At 1/100th shutter speed, which I use very often with standard focal length, the shutter shock is visible, loss of sharpness is about 30% (K1 36Mp output is comparable to a 24Mp output of the K3). When using between 1/100 and 1/200 with K1 in crop mode and DFA150-450 @ 400 (wildlife) + mechanical shutter, on solid tripod, the images are blurred. Workaround is to use LV + ES, but the downsides are slow AF and battery drain, although with the battery grip fully charge, LV can be used for 4 hours without having overheat shutdown. K3 also has shutter shock vibration transmitter to the lens elements, it is also visible at 400mm, especially with the DA300+TC, using a beanbag over the full area of the camera body+lens reveals that the DA300+TC optics are sharp, but the lens vibration not being damped (when using the lens tripod collar instead of beanbag) ruin the optical sharpness potential. The worst lens of all at getting the vibrations into the image is the DFA28-105. When I use the K1 with the DFA24-70 or DFA15-30, there is also the shutter shock effect but to an extent that sharpness degradation is not obvious. ...........
I've learned to cope with that:
- either using TAv (have shutter speed at 1/200+, and auto ISO)
- or use LV+ES
- or use OVF + pixel shift (handheld) and keep only frame #1 in post, that works very well but the camera buffer gets clogged by pixels shifted frames that will be discarded later.
Not so straightforward and a bit annoying for an expensive camera.That's why I'm looking forward to have a firmware update with the implementation of EFCS in non-live view mode (that is pixel shift mode aborted after frame#1, like it is on the KP and like Nikon have done on the D850...).
I think this is an important consideration for the full frame system that cost many thousand Eur/$, and
if Ricoh wants to sell DFA* primes lenses, they better have also EFCS with small delay usable with OVF, because I wonder
what will be the point to sell outstanding big premium prime glass if the shutter shock degrade the fine resolution achievable with those new lenses?. Lets see if Ricoh listen.
Last edited by biz-engineer; 09-09-2017 at 10:57 PM.