LumoLabs: Shutter induced blur with the Pentax K-7 camera

blende8 · 09-25-2010, 08:51 AM

At the Photokina Pentax Germany admitted that the problem exists.
They can reproduce it.
They have forwarded the material to Japan.

dankoBanana · 09-25-2010, 08:52 AM

Originally posted by blende8

At the Photokina Pentax Germany admitted that the problem exists.
They can reproduce it.
They have forwarded the material to Japan.

the question is, is it present in the K5?

blende8 · 09-25-2010, 08:58 AM

Falk said, that he will test it as soon as he will get a K5.

dankoBanana · 09-25-2010, 09:06 AM

Originally posted by blende8

Falk said, that he will test it as soon as he will get a K5.

the results will play a major role in my decision to "buy" a K5 ... I will be graduating from college later this year and I'm planning on getting it as a gift from my parents

the last squeeze before I start paying myself for Pentax goodies

mattdm · 09-25-2010, 06:35 PM

Originally posted by dankoBanana

the results will play a major role in my decision to "buy" a K5 ... I will be graduating from college later this year and I'm planning on getting it as a gift from my parents

the last squeeze before I start paying myself for Pentax goodies

So, here's a question: would you rather buy a camera in which someone has found a particular quirk, or a different camera which certainly has quirks which are not yet discovered?

glanglois · 09-26-2010, 09:18 AM

Originally posted by mattdm

So, here's a question: would you rather buy a camera in which someone has found a particular quirk, or a different camera which certainly has quirks which are not yet discovered?

Perhaps not the right question, Matt.

Any complex device will certainly have yet-undiscovered quirks, including K-5.

The only question to answer here is the extent to which the known quirks have an impact on your photography. Each of us will answer that for ourselves.

anthers · 09-26-2010, 09:44 AM

Falk - thank you for doing the testing, it's great to have some kind of study documenting what other people have anecdotally reported.

I guess my question is, along with all of the other variables (hand held shake, lenses loosing resolution when stopping down) :

How big is the resolution loss compared to everything else?

thibs · 09-26-2010, 10:40 AM

Originally posted by glanglois

Perhaps not the right question, Matt.

Any complex device will certainly have yet-undiscovered quirks, including K-5.

The only question to answer here is the extent to which the known quirks have an impact on your photography. Each of us will answer that for ourselves.

I agree but IMO mattdm still has a point. Other camera may be clean of it or even worse but pentax takes it all.
Easy enough IMO

mattdm · 09-26-2010, 02:01 PM

Originally posted by glanglois

Any complex device will certainly have yet-undiscovered quirks, including K-5.

And the Nikon D7000 and Canon 60D. And Leica S2.

dlacouture · 10-04-2010, 12:39 PM

Sorry to bring back this thread from the 2nd page, but any news with v1.10.20.26 yet?

falconeye · 10-04-2010, 03:04 PM

Originally posted by dlacouture

Sorry to bring back this thread from the 2nd page, but any news with v1.10.20.26 yet?

I am sorry to say but I don't plan to check this out.

standors · 03-22-2011, 07:04 AM

Please had somebody got repaired the "shutter induced blur" problem which was discussed for K-7 but occurs also for K-x? I’m interesting if some service center was able to repair it. Maybe it could be solved by replacing the shutter unit for newer one from K-5 or K-r.

The problem is observed as a image motion blur ( but it could seem to somebody as out of focus blur ). This blur occurs only for shutter speed in range cca 1/30 – 1/125 sec with peek cca 1/80 sec ( where blur is highest ). This blur is caused by shake from shutter and could not be eliminated by stabilizer (SR). Very unpleasant is that the problem could be avoided only by NOT using shutter speeds in range cca 1/30-1/125. It occurs for handheld shots but also if shooting from standard quality tripod with mirror lockup !!, exceptionally heavy tripod could partly eliminate the blur.

Geos · 04-16-2011, 09:07 AM

Major deal breaker. I was considering a K-7. Hope this doesn't apply to the K-5. How about mirror slap being responsible? One more reason for going mirrorless.

richardm · 04-17-2011, 10:49 PM

Read the report. It's not mirror slap. The K5 was tested; it's fine. The K5 often has a different problem, though.

Tycn · 02-14-2012, 06:23 AM

Originally posted by falconeye

A flash is fast enough to eliminate the blur. If it is the dominant light source.

Sorry if it's bad form to resurrect a thread in this manner, but I had a read after noticing this phenomenon in my images and was curious about this comment.

How does the use of flash allow shutter blur to be eliminated? The max sync speed seems to be well within the region of extraneous blur and the added weight doesn't seem great enough to eliminate the effect.

I really appreciate the articles, by the way. Wish this sort of rigorous, informed testing was more common.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Pentax K-x mirror slap and/or SR blur problem	firefly	Pentax DSLR Discussion	100	02-02-2011 07:26 PM
Which Camera has a quieter shutter? K-x or K-7	path	Pentax DSLR Discussion	29	04-08-2010 08:42 AM
Lumolabs: Nikon D700 vs. D5000 vs. Pentax K-x, Dynamic range and noise	falconeye	Pentax News and Rumors	12	12-18-2009 05:34 AM
Lumolabs: K-x vs. K-7 and the dynamic range champion of 2009	falconeye	Pentax DSLR Discussion	64	11-02-2009 04:03 AM
realtor induced migraine	41ants	General Talk	9	08-13-2009 05:54 PM

09-25-2010, 08:51 AM	#136
blende8 Veteran Member Join Date: Feb 2007 Location: Bremen, Germany Photos: Albums Posts: 1,521	At the Photokina Pentax Germany admitted that the problem exists. They can reproduce it. They have forwarded the material to Japan.

09-25-2010, 08:52 AM	#137
dankoBanana Inactive Account Join Date: Dec 2008 Location: Zagreb, Croatia Posts: 533	Originally posted by blende8 At the Photokina Pentax Germany admitted that the problem exists. They can reproduce it. They have forwarded the material to Japan. the question is, is it present in the K5?

09-25-2010, 08:58 AM	#138
blende8 Veteran Member Join Date: Feb 2007 Location: Bremen, Germany Photos: Albums Posts: 1,521	Falk said, that he will test it as soon as he will get a K5.

09-25-2010, 09:06 AM	#139
dankoBanana Inactive Account Join Date: Dec 2008 Location: Zagreb, Croatia Posts: 533	Originally posted by blende8 Falk said, that he will test it as soon as he will get a K5. the results will play a major role in my decision to "buy" a K5 ... I will be graduating from college later this year and I'm planning on getting it as a gift from my parents the last squeeze before I start paying myself for Pentax goodies

09-25-2010, 06:35 PM	#140
mattdm Veteran Member Join Date: Feb 2007 Location: Boston, MA Photos: Gallery Posts: 2,948	Originally posted by dankoBanana the results will play a major role in my decision to "buy" a K5 ... I will be graduating from college later this year and I'm planning on getting it as a gift from my parents the last squeeze before I start paying myself for Pentax goodies So, here's a question: would you rather buy a camera in which someone has found a particular quirk, or a different camera which certainly has quirks which are not yet discovered?

09-26-2010, 09:18 AM	#141
glanglois Veteran Member Join Date: Aug 2007 Location: Madison, Wis., USA Posts: 1,506	Originally posted by mattdm So, here's a question: would you rather buy a camera in which someone has found a particular quirk, or a different camera which certainly has quirks which are not yet discovered? Perhaps not the right question, Matt. Any complex device will certainly have yet-undiscovered quirks, including K-5. The only question to answer here is the extent to which the known quirks have an impact on your photography. Each of us will answer that for ourselves.

09-26-2010, 09:44 AM	#142
anthers Senior Member Join Date: Apr 2010 Location: California Photos: Albums Posts: 125	Falk - thank you for doing the testing, it's great to have some kind of study documenting what other people have anecdotally reported. I guess my question is, along with all of the other variables (hand held shake, lenses loosing resolution when stopping down) : How big is the resolution loss compared to everything else?

09-26-2010, 10:40 AM	#143
thibs Pentaxian Join Date: Jun 2007 Location: Belgium Photos: Albums Posts: 7,001	Originally posted by glanglois Perhaps not the right question, Matt. Any complex device will certainly have yet-undiscovered quirks, including K-5. The only question to answer here is the extent to which the known quirks have an impact on your photography. Each of us will answer that for ourselves. I agree but IMO mattdm still has a point. Other camera may be clean of it or even worse but pentax takes it all. Easy enough IMO

09-26-2010, 02:01 PM	#144
mattdm Veteran Member Join Date: Feb 2007 Location: Boston, MA Photos: Gallery Posts: 2,948	Originally posted by glanglois Any complex device will certainly have yet-undiscovered quirks, including K-5. And the Nikon D7000 and Canon 60D. And Leica S2.

10-04-2010, 12:39 PM	#145
dlacouture Veteran Member Join Date: Jul 2008 Location: Var, South of France Photos: Albums Posts: 1,074	Sorry to bring back this thread from the 2nd page, but any news with v1.10.20.26 yet?

10-04-2010, 03:04 PM	#146
falconeye Veteran Member Join Date: Jan 2008 Location: Munich, Alps, Germany Photos: Gallery Posts: 6,871 Original Poster	Originally posted by dlacouture Sorry to bring back this thread from the 2nd page, but any news with v1.10.20.26 yet? I am sorry to say but I don't plan to check this out.

03-22-2011, 07:04 AM	#147
standors New Member Join Date: Feb 2010 Posts: 1	Please had somebody got repaired the "shutter induced blur" problem which was discussed for K-7 but occurs also for K-x? I’m interesting if some service center was able to repair it. Maybe it could be solved by replacing the shutter unit for newer one from K-5 or K-r. The problem is observed as a image motion blur ( but it could seem to somebody as out of focus blur ). This blur occurs only for shutter speed in range cca 1/30 – 1/125 sec with peek cca 1/80 sec ( where blur is highest ). This blur is caused by shake from shutter and could not be eliminated by stabilizer (SR). Very unpleasant is that the problem could be avoided only by NOT using shutter speeds in range cca 1/30-1/125. It occurs for handheld shots but also if shooting from standard quality tripod with mirror lockup !!, exceptionally heavy tripod could partly eliminate the blur.

04-16-2011, 09:07 AM	#148
Geos New Member Join Date: Apr 2011 Location: Easton, PA Posts: 8	Major deal breaker. I was considering a K-7. Hope this doesn't apply to the K-5. How about mirror slap being responsible? One more reason for going mirrorless.

04-17-2011, 10:49 PM	#149
richardm Junior Member Join Date: Jun 2010 Location: Morges, Switzerland Posts: 41	Read the report. It's not mirror slap. The K5 was tested; it's fine. The K5 often has a different problem, though.

02-14-2012, 06:23 AM	#150
Tycn Junior Member Join Date: Dec 2011 Location: Sydney Posts: 29	Originally posted by falconeye A flash is fast enough to eliminate the blur. If it is the dominant light source. Sorry if it's bad form to resurrect a thread in this manner, but I had a read after noticing this phenomenon in my images and was curious about this comment. How does the use of flash allow shutter blur to be eliminated? The max sync speed seems to be well within the region of extraneous blur and the added weight doesn't seem great enough to eliminate the effect. I really appreciate the articles, by the way. Wish this sort of rigorous, informed testing was more common.