Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
11-03-2012, 03:59 PM   #1
Inactive Account

Join Date: Apr 2011
Posts: 10
Large green bands on night shots (K20D)

Hi all, I'm after some advance regarding night shots with a K20D.

This evening I drove into the countryside to take few cold night shots but when I downloaded the photos may have green banding on them (mainly on the left of the photo).

Banding is less on ISO100 compared to ISO400 but it's still very noticeable (exposure times where approx 2 minutes).

Any ideas?


Last edited by mateus; 11-03-2012 at 04:10 PM.
11-03-2012, 04:11 PM   #2
Forum Member

Join Date: Apr 2010
Location: Santa Barbara
Photos: Albums
Posts: 60
If I recall correctly, this was a well documented problem with K20D's Samsung sensor what needed to be replaced (warranty covered it at that time). They tried a software patch, but the fix was only marginal.
11-03-2012, 05:49 PM   #3
Inactive Account

Join Date: Apr 2011
Posts: 10
Original Poster
Really? Oh dear.

Well I'll carry on and hope for the best!

Last edited by mateus; 11-04-2012 at 04:07 AM.
11-04-2012, 04:09 AM   #4
Inactive Account

Join Date: Apr 2011
Posts: 10
Original Poster
Maybe it's the cold weather too? Apparently taking long exposures at below 2c causes banding!

11-04-2012, 08:25 AM   #5

Join Date: Aug 2011
Location: Windhoek, Namibia
Photos: Gallery
Posts: 385
I could not see any the green banding on my monitor, but have had a problem with intermittent green lines as well (

It was not as cold as during your expedition, but is has not recurred after the firmware update. I must admit, since getting a K5, the K2o does not get a lot of usage any more

Good luck
11-04-2012, 12:01 PM   #6
Site Supporter
Site Supporter
pixelsaurus's Avatar

Join Date: Jul 2007
Location: Levin, NZ
Photos: Gallery | Albums
Posts: 864
Did you have Noise Reduction turned on or off? Banding can be an issue with some sensors at high ISO and long exposures. You may have to embrace the Dark Side and incorporate darks, (same exposure/ISO as primary exposure but with the camera capped to keep out the light. It becomes a record of the noise characteristics of the sensor), and then subtract them in a program like Deep Sky Stacker or IRIS. Both are freeware.
11-05-2012, 02:06 AM   #7
Inactive Account

Join Date: Apr 2011
Posts: 10
Original Poster
Thanks for all the replies. Certainly the banding is not as bad as the example in your post Basie and I am on firmware 1.05. I'll try again but this time I'll get the sensor warmed up first with a few 30s shots as suggested by another user.

I'm not sure how Deep Sky Stacker works as how does one get a photo of stars without long exposures. I'll read the tutorials with interest.

(Oddly the green band in my example photo is not visible on my cheap work PC monitor but is very visible on my expensive Dell monitor at home.)

Last edited by mateus; 11-05-2012 at 02:15 AM.

  • 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!
night, night shots, pentax help, shots
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
Pentax K20D - vertical bands, noise, and hot pixel problems... :-( pentaxmz Pentax DSLR Discussion 26 04-04-2012 04:33 AM
Dark Bands on K20D picture NicPic Troubleshooting and Beginner Help 6 05-11-2011 08:28 AM
Star points on lights in night shots dosdan Pentax SLR Lens Discussion 5 10-30-2009 02:03 PM
Taking night shots w/ K20D..... UpNorth Pentax DSLR Discussion 21 02-16-2009 05:43 AM
Any Tips on shooting bands or cars?? rmtagg Pentax DSLR Discussion 20 05-13-2008 06:20 PM

All times are GMT -7. The time now is 07:35 AM. | See also:, 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?
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]