Stains on your K5d sensor poll

**jamesk8752** · 12-06-2010, 07:37 PM

My K-5, s/n 390071x, purchased from Amazon on Black Friday, has no sign of this defect. During my testing I did find one little dust bunny which my Rocket blower disposed of very neatly.

Regards, Jim

andi · 12-06-2010, 07:54 PM

Originally posted by dadipentak

Well, I did post photos in the "no more tests" thread ...

Great! Look, since my post, there's been around 50 posts about the so called stains
and not a single picture posted...
That looks to me like a case of paranoia.

m8o · 12-06-2010, 07:58 PM

Originally posted by andi

Great! Look, since my post, there's been around 50 posts about the so called stains and not a single picture posted...
That looks to me like a case of paranoia.

What are you on? ...you conveniently ignore my link because it doesn't fit your narrative?

Trig · 12-06-2010, 08:00 PM

I tested mine. Started to panic when I saw 2 specks. Did a cleaning with a rocket blower and it was just dust. It sure looked like the single dots people are reporting here. It did not look like the "strings".

I have NO stains on my K-5's Sensor.

My K-5 Serial Number: 3836XXX purchased here is the US from B&H

Question: Do these "stains" show up on a "dust alert"?

Last edited by Trig; 12-08-2010 at 01:34 PM.

ve2vfd · 12-06-2010, 08:00 PM

Originally posted by andi

Great! Look, since my post, there's been around 50 posts about the so called stains
and not a single picture posted...
That looks to me like a case of paranoia.

Edited what I initially wrote... it was juvenile and I apologize...

Look Andi, as I mentioned in the initial post this thread is for reporting defective (and non defective) K5d's, NOT for discussion, opinions and arguing.

If you want to start an argument then please START YOUR OWN THREAD.

Pat

telfish · 12-06-2010, 08:00 PM

Well my replacement camera is on it's way, should be here Thursday or Friday. First thing I will do is shoot at F32 using the same lens and distance I did for the tests that Falk worked on. I will let you know how I get on.

If I get another one with the spots I will send it back and keep sending faulty units back until I get one without this defect. My wife's K5 does not have these spots so it is possible to get a decent one.

I shoot Macro, often at F16-F32 for DOF. I cannot accept a camera with splodges most right in the center of the field of view.

dgaies · 12-06-2010, 08:01 PM

Originally posted by andi

Great! Look, since my post, there's been around 50 posts about the so called stains
and not a single picture posted...
That looks to me like a case of paranoia.

I hate to say this, as I really enjoy the photos you've posted in other threads and think you're a very talented photographer, but at the moment you're coming off as a bit of a jerk. Whether or not this issue would bother you if it was present on your sensor is hardly the point of this thread. And to call the issue BS and/or a case of paranoia is somewhat disrespectful, IMO, to the people who feel there is an issue.

Itai · 12-06-2010, 08:22 PM

No stains on my sensor but some on my mirror, luckily those were easy to clean.

Think Pentax forgot to put a sign saying "Employees must wash hands"

- Itai

MrPetkus · 12-06-2010, 08:45 PM

I posted earlier but didn't post my handsome string of pearls.

pinholecam · 12-06-2010, 08:54 PM

Stains/dust/indents could come from anything in the assembly process (ie. sensor pickup tool that was not clean; process that involves wiping; maybe lint free cloth used was not clean; operator #3361xxx not following assembly procedures; etc).
Good to alert Pentax to the real problem and they should scrutinize the assembly process to get it corrected.

Personally, having looked though enough scopes and failure analysis for my day job, I'd have to say that nothing looks 'clean' under high enough magnification, so expectations have to be realistic.
For me f8, f11 (for my usage) and nothing shows up, its considered. Ok. YMMV of course

Almost the same case with the hot pixel issue for the D7K. Some ppl are testing with lens cap on, ISO1600 or higher and shutter speeds under 1s. Expecting that the higher sensitivity and bias currents to not show up anything, under non-usage conditions, which blows the problem out of proportion.

my few cents.

**jbinpg** · 12-06-2010, 09:04 PM

Clean, s/n 3823965.

Raven_bc · 12-06-2010, 09:15 PM

Sadly I see the spots too.

S/N:3849420
Bought in Canada.

Lucky Sky · 12-06-2010, 10:09 PM

3836xxx stained and on it's way back to B&H Photo.

WerTicus · 12-06-2010, 10:10 PM

I was about to order one from an over seas online retailer and i asked them to check my camera for stains before shipping it to save postage in the event they found stains, and they found them

Its the last one anywhere till new batches arrive next year.

Originally posted by Itai

Think Pentax forgot to put a sign saying "Employees must wash hands"

Ahh, so its urine? This does not make things better....

noons · 12-06-2010, 10:12 PM

Gee... there's a fair ratio of stained:unstained k5's out there...

View Poll Results: Is your K5d sensor stained?
YES - There are stains on my sensor	193	56.43%
NO - My sensor has no stains	149	43.57%
Voters: 342. You may not vote on this poll

12-06-2010, 07:37 PM	#91
jamesk8752 Site Supporter Join Date: Dec 2006 Location: Suburban Detroit, MI, USA Posts: 238	No problem here... My K-5, s/n 390071x, purchased from Amazon on Black Friday, has no sign of this defect. During my testing I did find one little dust bunny which my Rocket blower disposed of very neatly. Regards, Jim

12-06-2010, 08:00 PM	#95
ve2vfd Veteran Member Join Date: Aug 2007 Location: Montreal, Canada Photos: Gallery Posts: 2,433 Original Poster	Originally posted by andi Great! Look, since my post, there's been around 50 posts about the so called stains and not a single picture posted... That looks to me like a case of paranoia. Edited what I initially wrote... it was juvenile and I apologize... Look Andi, as I mentioned in the initial post this thread is for reporting defective (and non defective) K5d's, NOT for discussion, opinions and arguing. If you want to start an argument then please START YOUR OWN THREAD. Pat Last edited by ve2vfd; 12-06-2010 at 08:14 PM.

12-06-2010, 08:45 PM	#99
MrPetkus Veteran Member Join Date: Feb 2010 Location: Long Island, NY Posts: 387	I posted earlier but didn't post my handsome string of pearls. Last edited by MrPetkus; 04-17-2012 at 08:49 PM.

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12-06-2010, 07:54 PM	#92
andi Senior Member Join Date: Sep 2009 Posts: 200	Originally posted by dadipentak Well, I did post photos in the "no more tests" thread ... Great! Look, since my post, there's been around 50 posts about the so called stains and not a single picture posted... That looks to me like a case of paranoia.

12-06-2010, 07:58 PM	#93
m8o Veteran Member Join Date: Jul 2007 Location: 40°-55'-44" N / 73°-24'-07" W [on LI] Photos: Gallery \| Albums Posts: 3,092	Originally posted by andi Great! Look, since my post, there's been around 50 posts about the so called stains and not a single picture posted... That looks to me like a case of paranoia. What are you on? ...you conveniently ignore my link because it doesn't fit your narrative?

12-06-2010, 08:00 PM	#94
Trig Senior Member Join Date: Aug 2009 Location: Acushnet, MA Photos: Gallery Posts: 211	I tested mine. Started to panic when I saw 2 specks. Did a cleaning with a rocket blower and it was just dust. It sure looked like the single dots people are reporting here. It did not look like the "strings". I have NO stains on my K-5's Sensor. My K-5 Serial Number: 3836XXX purchased here is the US from B&H Question: Do these "stains" show up on a "dust alert"? Last edited by Trig; 12-08-2010 at 01:34 PM.

12-06-2010, 08:00 PM	#96
telfish Veteran Member Join Date: Aug 2009 Location: NY Posts: 407	Well my replacement camera is on it's way, should be here Thursday or Friday. First thing I will do is shoot at F32 using the same lens and distance I did for the tests that Falk worked on. I will let you know how I get on. If I get another one with the spots I will send it back and keep sending faulty units back until I get one without this defect. My wife's K5 does not have these spots so it is possible to get a decent one. I shoot Macro, often at F16-F32 for DOF. I cannot accept a camera with splodges most right in the center of the field of view.

12-06-2010, 08:01 PM	#97
dgaies Veteran Member Join Date: Oct 2009 Location: Maryland / Washington DC Posts: 3,917	Originally posted by andi Great! Look, since my post, there's been around 50 posts about the so called stains and not a single picture posted... That looks to me like a case of paranoia. I hate to say this, as I really enjoy the photos you've posted in other threads and think you're a very talented photographer, but at the moment you're coming off as a bit of a jerk. Whether or not this issue would bother you if it was present on your sensor is hardly the point of this thread. And to call the issue BS and/or a case of paranoia is somewhat disrespectful, IMO, to the people who feel there is an issue.

12-06-2010, 08:22 PM	#98
Itai Senior Member Join Date: Sep 2009 Location: Montreal Photos: Gallery Posts: 209	No stains on my sensor but some on my mirror, luckily those were easy to clean. Think Pentax forgot to put a sign saying "Employees must wash hands" - Itai

12-06-2010, 08:54 PM	#100
pinholecam Pentaxian Join Date: Oct 2009 Location: North Photos: Gallery Posts: 4,709	Stains/dust/indents could come from anything in the assembly process (ie. sensor pickup tool that was not clean; process that involves wiping; maybe lint free cloth used was not clean; operator #3361xxx not following assembly procedures; etc). Good to alert Pentax to the real problem and they should scrutinize the assembly process to get it corrected. Personally, having looked though enough scopes and failure analysis for my day job, I'd have to say that nothing looks 'clean' under high enough magnification, so expectations have to be realistic. For me f8, f11 (for my usage) and nothing shows up, its considered. Ok. YMMV of course Almost the same case with the hot pixel issue for the D7K. Some ppl are testing with lens cap on, ISO1600 or higher and shutter speeds under 1s. Expecting that the higher sensitivity and bias currents to not show up anything, under non-usage conditions, which blows the problem out of proportion. my few cents.

12-06-2010, 09:04 PM	#101
jbinpg Site Supporter Join Date: Mar 2008 Location: Prince George, BC Photos: Gallery \| Albums Posts: 3,546	Clean, s/n 3823965.

12-06-2010, 09:15 PM	#102
Raven_bc Inactive Account Join Date: Dec 2010 Posts: 4	Sadly I see the spots too. S/N:3849420 Bought in Canada.

12-06-2010, 10:09 PM	#103
Lucky Sky Inactive Account Join Date: Sep 2006 Location: Lone Tree, Colorado, USA Posts: 77	3836xxx stained and on it's way back to B&H Photo.

12-06-2010, 10:10 PM	#104
WerTicus Veteran Member Join Date: Mar 2009 Location: Perth Australia Photos: Albums Posts: 1,514	I was about to order one from an over seas online retailer and i asked them to check my camera for stains before shipping it to save postage in the event they found stains, and they found them Its the last one anywhere till new batches arrive next year. Originally posted by Itai Think Pentax forgot to put a sign saying "Employees must wash hands" Ahh, so its urine? This does not make things better....

12-06-2010, 10:12 PM	#105
noons Senior Member Join Date: May 2010 Location: WA, Australia Posts: 164	Gee... there's a fair ratio of stained:unstained k5's out there...