Stains on your K5d sensor poll

ve2vfd · 12-23-2010, 03:16 PM

Originally posted by JayBee

My first email via Pentaxcanada.ca's webform generated a reply from Pentax USA. This website International Service Network (America) : Support & Service : PENTAX lists the email address service@pentaxcanada.ca. That's the one that got me a reply from Mississauga.

Thats good to know! At least now I know that the Pentax Canada webform email app is flawed.

I'll resend (for the third time) my email at that address right now.

Thanks a million!

Pat

stormcloud · 12-23-2010, 04:20 PM

sadly have to report mine is stained too but thankfully only one very small one off to the very edge of the frame so dont think i'll send it back specially since its only visable at apertures i very rarely use

falconeye · 12-23-2010, 06:14 PM

Originally posted by 2form

Falconeye, Could your analysis of AndyNick’s images possibly be the first confirmation of your earlier concerns “The most worrysome possibility is particles evaporating from a hot ceramic package (condensing on the inner side of the cover glass).”Falconeye - Advanced stainology…. or do you have another hypothesis as to how the string of pearls may have developed after the camera was shipped in AndyNicks case.

I don't think Andy's stains are at a different place than other string of pearl stains. Supposed to be IN the cover glass. A different mechanism wouldn't create the same pattern.

My #1 explaination is an error on our part. After all, physicists found a magnetic monopole and cold fusion. So, why not a dynamic string of pearls.

My #2 explaination would be a hidden glass defect becoming obvious only after mechanical tension. Where the mechanical stress is caused by the thermal expansion of the ceramic chip housing due to heat of operation.

As no other case was reported so far, I guess this is a very rare coincidence. I've put my K-5 into heat with 1h of continuous video and the stains didn't change.

Originally posted by AndyNick

will send off a message to them about this particular case.

Thanks.

tram57 · 12-24-2010, 10:41 AM

Has anyone received a k-5 with the os upgrade installed from the factory that had the sensor stain issue or have all of these been 'clean'?

Lumix · 12-24-2010, 06:10 PM

SN: 390XXXX No Stains

ve2vfd · 12-24-2010, 07:52 PM

Originally posted by ve2vfd

Thats good to know! At least now I know that the Pentax Canada webform email app is flawed.

I'll resend (for the third time) my email at that address right now.

Well, that was the problem! I got an answer from Pentax Canada service within 24 hours of emailing service@pentaxcanada.ca It's a relief to see the problem seems to be with their site's webform.

I'll be sending in my K5d after the holidays for an exchange.

They confirmed that they are looking into the webform-mail on their site.

Pat

Ian G · 12-24-2010, 08:26 PM

Originally posted by tram57

Has anyone received a k-5 with the os upgrade installed from the factory that had the sensor stain issue or have all of these been 'clean'?

I replaced my first K-5 with an obvious string of pearls and the new one came with the firmware update slip and a very stubborn single speck near the center of the frame. when i i view actual pixels, there might be a halo but i'm not positive. Haven't tried a wet clean but this speck was there right out of the box. (shrug)

Ian

henryk · 12-25-2010, 01:28 PM

K-5 arrived yesterday 12/24 from B&H. S/N 396XXXXX. No stains. A couple of very tiny dust motes (one in the upper left corner, one in the lower center right) visible at f22 but not at f8. The box carries a small white label with the S/N over a grey circle -- I read somewhere that cameras retested for stains would carry a label with a circle, but don't know if this is the one mentioned. Firmware version is 1.01.

janneman · 12-25-2010, 04:35 PM

cannot seem to cast a vote anymore...
anyways, Hamid the deliveryguy was brave enough to deliver me my second K-5 of the socalled "checked batch" in snow and ice...
No3913415.....

oooh yes a string... again....

tram57 · 12-25-2010, 07:47 PM

Well opened the beast from amazon. Sn390xxxx. No stains. A couple of isolated spots with dark center and halo at f32 but a couple of sensor cleans and a puff from the rocket with the mirror up removed these.

No stain.

jolepp · 12-26-2010, 03:20 AM

Originally posted by janneman

cannot seem to cast a vote anymore...
anyways, Hamid the deliveryguy was brave enough to deliver me my second K-5 of the socalled "checked batch" in snow and ice...
No3913415.....

oooh yes a string... again....

Stinketh :-(

30v iPentax · 12-26-2010, 06:12 AM

Ei uusia Sony antureita seuraavaan Pentax malliin.

Free Soul · 12-26-2010, 12:11 PM

Today I went to the local photo-store. First checked the available K5 for stains and for AF on tungsten light.

The first one SN 38XXXXX had 1 stain. It was visible even on the camera's display preview.
The second and the last one SN 391XXXX was clear. It's mine already.

30v iPentax · 12-26-2010, 11:43 PM

Jotain vikaa on silloinkin jos uudessa tai viikonvanhassa kamerassa näkyy pölyhiukkasiakin. Puhumattakaan tahroista, olisi kaikki kamerat vaihdettava ja sony kennot poistettava kokonaan.
Kaikki turhat selitykset pois ja asia korjattava.

30v iPentax · 12-27-2010, 07:08 AM

Jo oli minullakin tahroja. Uusi mittaus paljasti kaiken. 300mm MF Ääretön F32 ISO 80 - 100 +1 EV
Harmaa taivas. Yksi selkeä piste ympärillä vaaleampi kekä, siaitsi vasen alareuna ja muutama vaaleempi läiskä yläpuolella lähellä keski viivaa. En tiedä näitten sensorien tekotapaa, mutta arvelisin kuivuneita nesteläiskiä? Eli huono hykieenia.

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

12-24-2010, 06:10 PM	#410
Lumix New Member Join Date: Dec 2010 Photos: Gallery \| Albums Posts: 10	SN: 390XXXX No Stains Last edited by Lumix; 12-27-2010 at 10:33 AM.

12-25-2010, 01:28 PM	#413
henryk Forum Member Join Date: Jan 2008 Location: Evanston IL Posts: 62	Stainless K-5 arrived yesterday 12/24 from B&H. S/N 396XXXXX. No stains. A couple of very tiny dust motes (one in the upper left corner, one in the lower center right) visible at f22 but not at f8. The box carries a small white label with the S/N over a grey circle -- I read somewhere that cameras retested for stains would carry a label with a circle, but don't know if this is the one mentioned. Firmware version is 1.01.

12-25-2010, 04:35 PM	#414
janneman Veteran Member Join Date: Sep 2006 Location: Netherlands Photos: Gallery Posts: 908	is the poll closed?/ cannot seem to cast a vote anymore... anyways, Hamid the deliveryguy was brave enough to deliver me my second K-5 of the socalled "checked batch" in snow and ice... No3913415..... oooh yes a string... again....

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12-23-2010, 03:16 PM	#406
ve2vfd Veteran Member Join Date: Aug 2007 Location: Montreal, Canada Photos: Gallery Posts: 2,433 Original Poster	Originally posted by JayBee My first email via Pentaxcanada.ca's webform generated a reply from Pentax USA. This website International Service Network (America) : Support & Service : PENTAX lists the email address service@pentaxcanada.ca. That's the one that got me a reply from Mississauga. Thats good to know! At least now I know that the Pentax Canada webform email app is flawed. I'll resend (for the third time) my email at that address right now. Thanks a million! Pat

12-23-2010, 04:20 PM	#407
stormcloud Senior Member Join Date: Oct 2009 Posts: 232	sadly have to report mine is stained too but thankfully only one very small one off to the very edge of the frame so dont think i'll send it back specially since its only visable at apertures i very rarely use

12-23-2010, 06:14 PM	#408
falconeye Veteran Member Join Date: Jan 2008 Location: Munich, Alps, Germany Photos: Gallery Posts: 6,871	Originally posted by 2form Falconeye, Could your analysis of AndyNick’s images possibly be the first confirmation of your earlier concerns “The most worrysome possibility is particles evaporating from a hot ceramic package (condensing on the inner side of the cover glass).”Falconeye - Advanced stainology…. or do you have another hypothesis as to how the string of pearls may have developed after the camera was shipped in AndyNicks case. I don't think Andy's stains are at a different place than other string of pearl stains. Supposed to be IN the cover glass. A different mechanism wouldn't create the same pattern. My #1 explaination is an error on our part. After all, physicists found a magnetic monopole and cold fusion. So, why not a dynamic string of pearls. My #2 explaination would be a hidden glass defect becoming obvious only after mechanical tension. Where the mechanical stress is caused by the thermal expansion of the ceramic chip housing due to heat of operation. As no other case was reported so far, I guess this is a very rare coincidence. I've put my K-5 into heat with 1h of continuous video and the stains didn't change. Originally posted by AndyNick will send off a message to them about this particular case. Thanks.

12-24-2010, 10:41 AM	#409
tram57 Senior Member Join Date: Feb 2010 Photos: Gallery Posts: 176	Has anyone received a k-5 with the os upgrade installed from the factory that had the sensor stain issue or have all of these been 'clean'?

12-24-2010, 07:52 PM	#411
ve2vfd Veteran Member Join Date: Aug 2007 Location: Montreal, Canada Photos: Gallery Posts: 2,433 Original Poster	Originally posted by ve2vfd Thats good to know! At least now I know that the Pentax Canada webform email app is flawed. I'll resend (for the third time) my email at that address right now. Well, that was the problem! I got an answer from Pentax Canada service within 24 hours of emailing service@pentaxcanada.ca It's a relief to see the problem seems to be with their site's webform. I'll be sending in my K5d after the holidays for an exchange. They confirmed that they are looking into the webform-mail on their site. Pat

12-24-2010, 08:26 PM	#412
Ian G New Member Join Date: Jan 2010 Location: Philly Posts: 8	Originally posted by tram57 Has anyone received a k-5 with the os upgrade installed from the factory that had the sensor stain issue or have all of these been 'clean'? I replaced my first K-5 with an obvious string of pearls and the new one came with the firmware update slip and a very stubborn single speck near the center of the frame. when i i view actual pixels, there might be a halo but i'm not positive. Haven't tried a wet clean but this speck was there right out of the box. (shrug) Ian

12-25-2010, 07:47 PM	#415
tram57 Senior Member Join Date: Feb 2010 Photos: Gallery Posts: 176	Well opened the beast from amazon. Sn390xxxx. No stains. A couple of isolated spots with dark center and halo at f32 but a couple of sensor cleans and a puff from the rocket with the mirror up removed these. No stain.

12-26-2010, 03:20 AM	#416
jolepp Veteran Member Join Date: Oct 2010 Location: Finland Photos: Albums Posts: 3,196	Originally posted by janneman cannot seem to cast a vote anymore... anyways, Hamid the deliveryguy was brave enough to deliver me my second K-5 of the socalled "checked batch" in snow and ice... No3913415..... oooh yes a string... again.... Stinketh :-(

12-26-2010, 06:12 AM	#417
30v iPentax Inactive Account Join Date: Apr 2010 Location: Suomi , Finland Posts: 368	Ei uusia Sony antureita seuraavaan Pentax malliin.

12-26-2010, 12:11 PM	#418
Free Soul Forum Member Join Date: Dec 2007 Location: Bulgaria Photos: Gallery Posts: 94	Today I went to the local photo-store. First checked the available K5 for stains and for AF on tungsten light. The first one SN 38XXXXX had 1 stain. It was visible even on the camera's display preview. The second and the last one SN 391XXXX was clear. It's mine already.

12-26-2010, 11:43 PM	#419
30v iPentax Inactive Account Join Date: Apr 2010 Location: Suomi , Finland Posts: 368	Jotain vikaa on silloinkin jos uudessa tai viikonvanhassa kamerassa näkyy pölyhiukkasiakin. Puhumattakaan tahroista, olisi kaikki kamerat vaihdettava ja sony kennot poistettava kokonaan. Kaikki turhat selitykset pois ja asia korjattava.

12-27-2010, 07:08 AM	#420
30v iPentax Inactive Account Join Date: Apr 2010 Location: Suomi , Finland Posts: 368	Jo oli minullakin tahroja. Uusi mittaus paljasti kaiken. 300mm MF Ääretön F32 ISO 80 - 100 +1 EV Harmaa taivas. Yksi selkeä piste ympärillä vaaleampi kekä, siaitsi vasen alareuna ja muutama vaaleempi läiskä yläpuolella lähellä keski viivaa. En tiedä näitten sensorien tekotapaa, mutta arvelisin kuivuneita nesteläiskiä? Eli huono hykieenia.