K-7 shake reduction problems?

creampuff · 11-30-2009, 05:11 PM

In past Pentax cameras with SR, I believe SR is disabled when flash is used.
On the K-7, just remember to switch off the SR to prevent any possible occurrence of a double image.

Last edited by creampuff; 11-30-2009 at 06:02 PM.

Class A · 11-30-2009, 05:26 PM

Originally posted by creampuff

In past Pentax cameras with SR, SR is disabled when flash is used.

Not true for the K100D and I doubt it is true for other past Pentax cameras.

The K100D manual specifically mentions the "slow-synch" application where you want to have both (shake reduced) ambient light exposure + flash exposure.

Why are you referring to "double images" rather than "blurred images"?

creampuff · 11-30-2009, 06:16 PM

Class A, I was a K100D and K100D Super user so I am aware of slow speed sync which I have used quite a bit. Just that with the K-7, I've tried disabling SR with flash and it appears give a slightly sharper image.

RBellavance · 11-30-2009, 06:21 PM

Originally posted by creampuff

In past Pentax cameras with SR, I believe SR is disabled when flash is used.

Only when wireless flash is used.

creampuff · 11-30-2009, 07:02 PM

Thanks for the correction.

frank · 11-30-2009, 11:46 PM

I've noticed the same problem w/ my K7 when using an external flash (sync speed at 1/180s). The results seem to have some overlapping instead of blurring problem

Some friend also confirmed that even w/o a flash, the results might have some overlapping problem too if the shutter speed is somewhere between 1/160s to 1/180s, and this won't happen at higher or slower speed.

This should be addressed to Pentax so they can release a firmware to fix this problem. Otherwise we have to switch off SR everytime we use flash, or shoot at 1/160s to 1/180s shutter speed.

HGMonaro · 12-01-2009, 03:31 AM

well I won't post another image but the Mrs managed a whole heap of these today... s/speed was around 1/100-1/125th

**Eric Seavey** · 10-01-2010, 10:40 AM

I just sent my K-7 in for service to deal with this blurring problem. I posted a thread about blurring with my K-7 and thought it was user error. Now after many more tests, I am narrowing my problem down to:
- Using hotshoe flash
- Flash used as fill flash so that the ambient lighting is enough to produce a reasonable exposure
- Freshly charged batteries!!
- At 1/125s exposure time, the blur is the worst (even with 50 to 70mm lens)

I noticed that the blurred images posted here have flash turned on. Also the amount of blur (that should be sharp with the 1/f rule) all have similar amount of blur regardless of the focal length.

Anybody interested trying this test? I am really interested in other people's results.

Eric

mcjm78 · 10-02-2010, 12:51 AM

My first K-7 used to have this issue randomly. The worst thing is it happened to me during one of my wedding assignment, and I've to do some serious post editing to save an important photo.

Anyway, I've send it in for repair, and got a new K-7 instead. So far 9 months later, I've not encounter this issue.

Make sure your service center do a good job.

Mike

HGMonaro · 10-04-2010, 08:53 PM

Originally posted by mcjm78

Anyway, I've send it in for repair, and got a new K-7 instead. So far 9 months later, I've not encounter this issue.

Make sure your service center do a good job.

Mike

Mike, was your's still in warrantee? Did it go to Melb? Can't remember how old my K7 is.. must check!

mcjm78 · 10-05-2010, 09:30 AM

Yes, mine was shipped to Melb by CRK.

Try the latest K-7 firmware, if you check the in another threat. Maybe the "secret" updates fixes it.

Mike

HGMonaro · 10-06-2010, 02:38 AM

just updated it to the latest 'silent' version (1.10.20.26) and it's still there but only seems to occur when I use the flash (AF540FGZ) and is mostly visible with white objects on dark backgrounds. Didn't try using the inbuilt flash. Looks like I bought it on 17/10/09 so, can I find the receipt!!!!

HGMonaro · 10-06-2010, 03:03 AM

Here's a trick for the masses... keep your product boxes and keep your invoices in the box! Yippee! found it!

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Do you always have shake reduction ON?	gawan	Photographic Technique	18	08-01-2010 02:36 PM
shake reduction	oatman911	Pentax DSLR Discussion	17	03-07-2009 04:38 AM
Thank you Shake Reduction!	tcdk	Post Your Photos!	4	09-03-2008 09:29 AM
Shake reduction not on?	Iowa Tom	Pentax DSLR Discussion	9	08-11-2008 04:00 PM
Shake Reduction	rfphill	Pentax DSLR Discussion	3	07-12-2008 03:29 PM

11-30-2009, 05:11 PM	#31
creampuff Veteran Member Join Date: May 2007 Location: Singapore Photos: Gallery Posts: 3,953	In past Pentax cameras with SR, I believe SR is disabled when flash is used. On the K-7, just remember to switch off the SR to prevent any possible occurrence of a double image. Last edited by creampuff; 11-30-2009 at 06:02 PM.

11-30-2009, 05:26 PM	#32
Class A Pentaxian Join Date: Aug 2008 Location: Wellington, New Zealand Posts: 11,251	Originally posted by creampuff In past Pentax cameras with SR, SR is disabled when flash is used. Not true for the K100D and I doubt it is true for other past Pentax cameras. The K100D manual specifically mentions the "slow-synch" application where you want to have both (shake reduced) ambient light exposure + flash exposure. Why are you referring to "double images" rather than "blurred images"?

11-30-2009, 06:16 PM	#33
creampuff Veteran Member Join Date: May 2007 Location: Singapore Photos: Gallery Posts: 3,953	Class A, I was a K100D and K100D Super user so I am aware of slow speed sync which I have used quite a bit. Just that with the K-7, I've tried disabling SR with flash and it appears give a slightly sharper image.

11-30-2009, 06:21 PM	#34
RBellavance Veteran Member Join Date: Nov 2006 Location: Near Montréal, Canada Photos: Gallery Posts: 1,716	Originally posted by creampuff In past Pentax cameras with SR, I believe SR is disabled when flash is used. Only when wireless flash is used.

11-30-2009, 07:02 PM	#35
creampuff Veteran Member Join Date: May 2007 Location: Singapore Photos: Gallery Posts: 3,953	Thanks for the correction.

11-30-2009, 11:46 PM	#36
frank Veteran Member Join Date: Nov 2006 Location: Singapore Photos: Gallery Posts: 3,202	I've noticed the same problem w/ my K7 when using an external flash (sync speed at 1/180s). The results seem to have some overlapping instead of blurring problem Some friend also confirmed that even w/o a flash, the results might have some overlapping problem too if the shutter speed is somewhere between 1/160s to 1/180s, and this won't happen at higher or slower speed. This should be addressed to Pentax so they can release a firmware to fix this problem. Otherwise we have to switch off SR everytime we use flash, or shoot at 1/160s to 1/180s shutter speed.

12-01-2009, 03:31 AM	#37
HGMonaro Veteran Member Join Date: Apr 2007 Location: Melb. Aust Posts: 840	well I won't post another image but the Mrs managed a whole heap of these today... s/speed was around 1/100-1/125th

10-01-2010, 10:40 AM	#38
Eric Seavey Site Supporter Join Date: Feb 2008 Location: Irvine, CA Photos: Gallery \| Albums Posts: 307	I just sent my K-7 in for service to deal with this blurring problem. I posted a thread about blurring with my K-7 and thought it was user error. Now after many more tests, I am narrowing my problem down to: - Using hotshoe flash - Flash used as fill flash so that the ambient lighting is enough to produce a reasonable exposure - Freshly charged batteries!! - At 1/125s exposure time, the blur is the worst (even with 50 to 70mm lens) I noticed that the blurred images posted here have flash turned on. Also the amount of blur (that should be sharp with the 1/f rule) all have similar amount of blur regardless of the focal length. Anybody interested trying this test? I am really interested in other people's results. Eric

10-02-2010, 12:51 AM	#39
mcjm78 Senior Member Join Date: Aug 2007 Location: Perth, Australia Posts: 268	My first K-7 used to have this issue randomly. The worst thing is it happened to me during one of my wedding assignment, and I've to do some serious post editing to save an important photo. Anyway, I've send it in for repair, and got a new K-7 instead. So far 9 months later, I've not encounter this issue. Make sure your service center do a good job. Mike

10-04-2010, 08:53 PM	#40
HGMonaro Veteran Member Join Date: Apr 2007 Location: Melb. Aust Posts: 840	Originally posted by mcjm78 Anyway, I've send it in for repair, and got a new K-7 instead. So far 9 months later, I've not encounter this issue. Make sure your service center do a good job. Mike Mike, was your's still in warrantee? Did it go to Melb? Can't remember how old my K7 is.. must check!

Thread Tools	Search this Thread
	Search this Thread: Advanced Search

10-05-2010, 09:30 AM	#41
mcjm78 Senior Member Join Date: Aug 2007 Location: Perth, Australia Posts: 268	Yes, mine was shipped to Melb by CRK. Try the latest K-7 firmware, if you check the in another threat. Maybe the "secret" updates fixes it. Mike

10-06-2010, 02:38 AM	#42
HGMonaro Veteran Member Join Date: Apr 2007 Location: Melb. Aust Posts: 840	just updated it to the latest 'silent' version (1.10.20.26) and it's still there but only seems to occur when I use the flash (AF540FGZ) and is mostly visible with white objects on dark backgrounds. Didn't try using the inbuilt flash. Looks like I bought it on 17/10/09 so, can I find the receipt!!!!

10-06-2010, 03:03 AM	#43
HGMonaro Veteran Member Join Date: Apr 2007 Location: Melb. Aust Posts: 840	Here's a trick for the masses... keep your product boxes and keep your invoices in the box! Yippee! found it!