Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
07-26-2012, 02:50 PM   #1
New Member




Join Date: Oct 2006
Posts: 8
Pentax k5 stains

So i got a new k5 and I have 2 small stains on the sensor but when using 55-300 the stains are all over the place.
Cant really see it that much with other lenses except for the 55-300 /f16/iso 400
My question is, is this because of glass reflections or am I missing something? .. ohh and the camera froze during the test, had to remove battery. Just want to confirm it before sending it back .
Snr:4332...

PS: Dont mind vignetting , my fault

Attached Images
 
07-26-2012, 03:10 PM   #2
Pentaxian
aleonx3's Avatar

Join Date: Jul 2007
Location: Brampton, Ontario
Photos: Gallery | Albums
Posts: 3,888
they don't look like stains to me (at least until it is proven); it is certainly dirty... did you by chance, change lens while you are outdoor with lots of wind?
07-26-2012, 03:33 PM   #3
Pentaxian




Join Date: Jun 2009
Location: GMT +10
Photos: Albums
Posts: 10,844
Looks like dust or dirt to me.

Have you:

(a) run the Dust Removal function a few times [Setup 4 menu > Dust Removal > OK]?
(b) run the Dust Alert test function (p-341 of the K-5 Manual)?

From (b), what does the saved Dust Alert image show? Post the resulting JPG.
07-26-2012, 03:41 PM   #4
New Member




Join Date: Oct 2006
Posts: 8
Original Poster
Thanx aleonx3 and rawr. I will try that tomorrow (middle of the night here) and will do more testing , really hope its just dust .
The Dust Alert test will only show dust but not stains?

07-26-2012, 04:13 PM   #5
Site Supporter
jimr-pdx's Avatar

Join Date: May 2010
Location: 1hr north of PDX
Photos: Gallery | Albums
Posts: 3,551
All 'stains' I've had shown to me look greasy/oily, with rings around them like splatter marks. Dark spots alone are most often dust.. hope it's still true for your sake.
07-26-2012, 05:40 PM   #6
Pentaxian




Join Date: Jun 2009
Location: GMT +10
Photos: Albums
Posts: 10,844
QuoteOriginally posted by 9while9 Quote
The Dust Alert test will only show dust but not stains?
Yes. But if it shows dust where you see stains, that will be a good result.

The stains classically look like strings of pearls, and tend to remain in the one place. They aren't known to move around the sensor from lens change to lens change.
07-26-2012, 05:52 PM   #7
Veteran Member
fotogaffer's Avatar

Join Date: Aug 2011
Location: Niagara Region, Ontario, Canada
Photos: Gallery
Posts: 716
I had the dreaded sensor stains on my first (early) K5 and it was exchanged for another model without stains by Pentax Canada. This does not look like sensor stains, but more like dust on the sensor to me.
07-26-2012, 07:02 PM - 1 Like   #8
Pentaxian
bobmaxja's Avatar

Join Date: Mar 2010
Location: Laval, Quebec Canada
Posts: 1,736
Another false alert with a wrong title
Dust Dust Dust

07-27-2012, 04:28 AM   #9
New Member




Join Date: Oct 2006
Posts: 8
Original Poster
Hi

So i did the dust alert thing and I cant really see anything. Talked to pentax and they say it's probably dust but they will clean it for free. I will know more when i get it back next week.
@bobmaxja: what are the odds of having dust on a brand new k5 with brand new lens on the first day? Seen dust before on my previous pentax but never like this.
Thanx everyone, much appreciated!
Attached Images
 
07-27-2012, 08:32 AM   #10
Pentaxian
bobmaxja's Avatar

Join Date: Mar 2010
Location: Laval, Quebec Canada
Posts: 1,736
You are not the first one that happened receiveing camera with dust on the sensor
07-27-2012, 09:39 AM   #11
Site Supporter
K57XR's Avatar

Join Date: Feb 2011
Location: Colorado, USA
Posts: 828
QuoteOriginally posted by 9while9 Quote
what are the odds of having dust on a brand new k5 with brand new lens on the first day?
Another slight possibility is that is not a brand new camera - erroneously shipped? Have you check shutter count and build date from exif? Though the SN you provided (43xx) seem to be new batch. I have a 43xx serial number with build date April 2012.
08-01-2012, 08:56 AM   #12
New Member




Join Date: Oct 2006
Posts: 8
Original Poster
So this is how it ended: Got k5 back from pentax today. Along with the camera there was a note from pentax repair shop: "Sensor replaced"

..so I'm guessing it was not just dust, but they fixed it in no time

Cheers and thanx everyone.
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
camera, dslr, k-5, k-5 ii, k-5 iis, k5, pentax k-5, pentax k5, stains
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Random freezes + sensor stains. Help! fbacim Pentax K-5 13 10-02-2011 09:51 AM
Sensor stains Paschalis Pentax K-5 4 09-14-2011 02:45 PM
Pentax K-5 CMOS pletter/Stains Photodana Pentax K-5 4 03-05-2011 05:09 AM
any official comment from Pentax due to k-5 stains? 006 Pentax K-5 4 12-28-2010 11:24 PM
A chat with Pentax USA on sensor stains and what they propose (or not) telfish Pentax K-5 74 12-11-2010 03:46 PM



All times are GMT -7. The time now is 11:22 AM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top