[slip]

https://www.dpreview.com/forums/post/54105302

[Paul the Sunman]

I am under the impression that allowing Electronic First Curtain Shutter might ameliorate the phenomenon but not be a complete cure.

Well, the K-1 is certainly physically capable of EFCS, as it uses it in pixel-shift. Maybe it only needs a firmware update to allow it generally. I think we have seen in this thread that it would be a valuable feature.

[David L]

Hi all, I've checked in Lightroom my 250+ photos that have shutter speed between 1/80 - 1/160. None of them have motion blur or double image. I do not think this is a common problem.

edit: Hi all, after a close examination again, I find that two images out of 101 taken with K1+DFA 28-105 lens at 1/100s have some double image blur...Too bad it's there! Sorry I should have be more careful before I posted previous comment.

[Paul the Sunman]

Actually, I think it is common, but not universal.

---------- Post added 29-07-16 at 11:30 AM ----------

Hi all, I've checked in Lightroom my 250+ photos that have shutter speed between 1/80 - 1/160. None of them have motion blur or double image. I do not think this is a common problem.

Which lens, and which focal length?

[Sandy Hancock]

My DFA15-30 does the same thing - randomly blurry hand held shots despite adequate shutter speed, stopped down, accurate focus and good hand-holding technique. With SR turned off results are tack sharp.

These rather boring test shots are uploaded to flickr at full size for those who are interested.

SR on:


Mr Hyde

SR off:


Dr Jeckyll

And here is a month's worth of shots taken subsequently, almost invariably hand held, with SR off, and some in quite low light.

Single in July 2016

Ricoh really needs to sort this out.

[Paul the Sunman]

My DFA15-30 does the same thing - randomly blurry hand held shots despite adequate shutter speed, stopped down, accurate focus and good hand-holding technique. With SR turned off results are tack sharp.

These rather boring test shots are uploaded to flickr at full size for those who are interested.

Ricoh really needs to sort this out.

Weather permitting, I'll compare SR on and off on the weekend. But your Mr Hyde does look familiar. I'm guessing it's worse though at around 1/100 sec.

We don't even know if Ricoh is aware of the problem yet.

[krazykat]

SR off:

Just a quick one Sandy, in the comments for Dr. Jekyll on Flikr you've stated that SR was on but here you've stated it was off. I can't see the EXIF to check.

[Adam]

Hi all, I've checked in Lightroom my 250+ photos that have shutter speed between 1/80 - 1/160. None of them have motion blur or double image. I do not think this is a common problem.

I don't think this affects all camera bodies, either- at least not in a significant way. Some shutters might cause more vibrations than others, perhaps due to manufacturing tolerance.

[clackers]

Around 1/100s suggests shutter shock:

A Thousand Words A Picture: Mirror-Slap Versus Shutter Shock

[Sandy Hancock]

Just a quick one Sandy, in the comments for Dr. Jekyll on Flikr you've stated that SR was on but here you've stated it was off. I can't see the EXIF to check.

Ah! Well spotted. It was a while ago and I had forgotten. They were both with SR on, with very different results despite identical conditions. After the discussion around these two shots I have tried to remember to turn SR off every time I used the lens, with totally consistent and high quality results.

---------- Post added 29-07-16 at 02:06 PM ----------

Around 1/100s suggests shutter shock:

A Thousand Words A Picture: Mirror-Slap Versus Shutter Shock

Interesting. I'm pretty sure I have seen it at considerably faster shutter speeds as well, but I'll look into it.

[David L]

Hi all, after a close examination again, I find that two images out of 101 taken with K1+DFA 28-105 lens at 1/100s have some double image blur...Too bad it's there! Sorry I should have be more careful before I posted previous comment.

[Paul the Sunman]

I tried some tests this morning, with various lenses and various focal lengths. Camera on tripod, IR trigger with 3 sec delay, shooting boxes with text on them from 1-2 metres.

• Using D FA 28-105 @ 28mm, SR on, focus left fixed at point where 1:1 image very sharp at 1/500 sec: a little soft at 1/60 to 1/125 sec or even 1/200;
• Generally better with SR on;
• Slightly reduced effect at 48mm; again better with SR on,
• Softness absent with D FA* 70-200 at both 70mm and 160mm -- this is a very heavy lens that seems to stabilize the camera.

However, I was only seeing softness, not the "double image" I sometimes see hand-held. That seems to be characteristic of very complex scenes (such as vegetation), which suggests to me a focussing issue rather than purely camera shake.

I don't feel I fully understand this camera yet, but shutter shake is certainly identifiable in my tests.

[Ole]

I tried some tests this morning, with various lenses and various focal lengths. Camera on tripod, IR trigger with 3 sec delay, shooting boxes with text on them from 1-2 metres.

...

However, I was only seeing softness, not the "double image" I sometimes see hand-held. That seems to be characteristic of very complex scenes (such as vegetation), which suggests to me a focussing issue rather than purely camera shake.

I don't feel I fully understand this camera yet, but shutter shake is certainly identifiable in my tests.

I'd speculate that a good tripod would suppress the vibrations just enough that the double image doesn't show but becomes blur.