Toothwalker wrote:
Bas Hamstra wrote:
Double image is a tell tale sign of shutter shock. In fact the shutter shock may interact with the image stabilization in a bad way. This looks a lot like the first generations of MFT camera's that suffered from this. I had my share of it with the EPL-1 until I decided to turn image stabilzation off. Like totally and always. That got rid of most of the issues.
I mean the shutter is open before the take and then in an *instant* it must CLOSE-OPEN-CLOSE and this causes a really really hefty vibration. A shockwave.
I am not sure that SS is causing your issues, but it's a possibility. Could you try to turn off IS (just as an exeriment) and see if that makes a difference?
Kind regards,
Bas
I did test with IS turned off before, and the issue disappeared. Certainly when using a tripod. For handheld photography there is of course the increased risk of blur due to regular camera shake.
I use the first curtain electronic shutter by default, which shouldn't cause as hefty a shockwave was the mechanical shutter. And even if the shutter plays a role, it should not affect the first image of a series more than subsequent ones - or should it?
Here are two test images to illustrate the issue. They are raw files converted to JPEG with DPP - without any sharpening or other post-processing.
Electronic first curtain *should* take care of most of it. But 500mm at 1/80s? That's not a good example I would say, though IS has gotten better it still works "statistically", there will be a statistical improvement but you can't expect it to work perfect for each and every shot. Which is happening here.
Anyway shutter shock is mostly bound to certain shutter speeds, for older gens MFT it was 1/160 where nearly all of the trouble was. Time and again I would notice a double (ghost) image, check the shutter speed and always find it was close to 1/160. Are you seeing that strong correlation too?
Bas