Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
01-20-2011, 09:51 AM   #1
Junior Member

Join Date: Oct 2010
Posts: 34
Low ISO chroma noise?

I have a K-7 and I noticed a night shot had a lot of blue chroma noise in it but I was above ISO 1000 in that shot. So I did the sensor sweep in camera and that seemed to make it better.

But the other day I used my 50mm, at night, at IS0 250 and handheld at a slower shutter speed, enough that it was sharp enough. Maybe 1/8 second? It exposed close to proper in the bright areas lit by building lights.

But I zoomed in to the 1:1 view and there were all the blue spots which I assume is chroma noise everywhere and that was in the brightest part of the scene.

Is that normal?

UPDATE: Ok I realized that while I shot this at IS0 250 I was using Picasa and had to add fill light and sharpening. Doing so, while looking 1:1 in Picasa made this shot all blue chroma noise everywhere. So maybe it is just the K-7 sucks more than my DL in dark areas. I don't see that same effect on the DL.

Here are some comparison shots anyway. Maybe I am just expecting too much of this camera.
The shot I am worried about is the girl smoking by the metal pillars ISO 250.

Last edited by Corvairfan; 01-20-2011 at 05:38 PM.
01-20-2011, 10:36 AM   #2
Veteran Member
lavascript's Avatar

Join Date: Jul 2009
Location: Baton Rouge
Posts: 390
I would say that ISO250, 1/8 sec, having some degree of noise in the shadow areas is normal. But posting the pic would help tremendously.

  • 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, chroma, dl, dslr, iso, k-7, noise, photography, picasa, shot
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
K5 Low ISO Noise ----- Not! JeffJS Pentax K-5 52 06-24-2011 12:07 AM
High Noise at Low ISO? JGB Troubleshooting and Beginner Help 19 11-11-2010 07:39 PM
More to KX high ISO than low noise telfish Pentax DSLR Discussion 1 02-11-2010 02:22 PM
Noise at low ISO in k200d Pusiek Pentax DSLR Discussion 10 08-24-2008 02:53 PM
K20 and K10 LOW ISO noise... Snowcat Pentax DSLR Discussion 0 01-28-2008 12:34 PM

All times are GMT -7. The time now is 04:15 PM. | 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]