Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
06-08-2009, 10:44 AM   #1
Forum Member




Join Date: Jan 2008
Posts: 55
K-7 image quality concern

I've looked at some K-7 pictures taken recently (firmware v0.35) and honestly I'm a bit worried about final images quality. Even at iso 100, there is high amount of noise especially in shadows, plus some vertical banding (@100iso) ! the overall K-7 samples look softer than K10D. I remember the k20d was problematic too. This is the same place, but not with same angle.

File-Upload.eu - Your free file hoster!

here is K-7, 100 iso, 28mm M prime lens
image moved to zip file

here is K10D, 100 iso, 50mm M prime (chinon) lens (no sharpening applied)
image moved to zip file

Waiting to have some final firmware images but, if it doesn't improve at low (base) iso, this camera is definitly not an upgrade for me.

-----------------------------------------------------------------------

june, 14 th update:

comparing sharpness with nikon toy camera D5000 & nikon D700



The Pentax image is official one found on pentax site. State of the art star lens show a pretty lack of sharpness and contrast on K-7, even at f/5 which is basically where the lens should be stellar. What's the deal with this new sensor ?


Last edited by claude21; 06-14-2009 at 07:05 AM. Reason: bad links
06-08-2009, 10:49 AM   #2
Pentaxian
gazonk's Avatar

Join Date: Feb 2009
Location: Oslo area, Norway
Photos: Gallery | Albums
Posts: 3,509
QuoteOriginally posted by claude21 Quote
I've looked at some K-7 pictures taken recently (firmware v0.35) and honestly I'm a bit worried about final images quality. Even at iso 100, there is high amount of noise especially in shadows, plus some vertical banding (@100iso) ! the overall K-7 samples look softer than K10D. I remember the k20d was problematic too. This is the same place, but not with same angle.

here is K-7, 100 iso, 28mm M prime lens

Waiting to have some final firmware images but, if it doesn't improve at low (base) iso, this camera is definitly not an upgrade for me.
Are you trolling? How can you sea noise or banding in that small image?? (I tried for fun to push the shadows, but I see absolutely no noise at all)
06-08-2009, 11:02 AM   #3
Veteran Member




Join Date: Jul 2008
Location: Sweden, Umea
Posts: 869
Dont feed the trolls!!
06-08-2009, 11:04 AM   #4
Forum Member




Join Date: Jan 2008
Posts: 55
Original Poster
QuoteOriginally posted by gazonk Quote
Are you trolling? How can you sea noise or banding in that small image?? (I tried for fun to push the shadows, but I see absolutely no noise at all)
sorry, image shack have resized the originals. I'll repost them

06-08-2009, 11:29 AM   #5
Site Supporter
hinman's Avatar

Join Date: Oct 2006
Location: Fremont, CA
Photos: Albums
Posts: 3,425
QuoteOriginally posted by claude21 Quote
sorry, image shack have resized the originals. I'll repost them
I am not a pixel peeper. I really don't see what you are concerned about. The original seem to come from this flickr account. I am quite pleased with the photos.

Pentax K-7 - a set on Flickr

Thanks,
Hin
06-08-2009, 05:56 PM   #6
Veteran Member
KungPOW's Avatar

Join Date: Nov 2007
Location: Vancouver, Canada
Photos: Gallery
Posts: 1,702
Fine be worried. I hope it keeps you up at night.

So you post this because you expect that photo to be the same as the final firmware?

You have no way of knowing WHAT the final firmware will look like. Until then, posts like this just spread FUD. But I bet you know that.
06-08-2009, 06:15 PM   #7
Pentaxian




Join Date: Sep 2006
Location: Kaunas
Posts: 1,452
Samples of pre-production camera are not impressive at all. However it's a pre-production camera, right?

I don't believe that Pentax is going to make K-7 image quality worse than K20D.

By the way, what does FUD mean?

Last edited by Edvinas; 06-08-2009 at 06:21 PM.
06-08-2009, 06:17 PM   #8
Veteran Member
Duck Dodgers's Avatar

Join Date: Dec 2007
Location: in the 24½th Century!
Photos: Gallery
Posts: 439
Fear, uncertainty and doubt - Wikipedia, the free encyclopedia

06-08-2009, 07:19 PM   #9
Loyal Site Supporter




Join Date: Mar 2009
Location: Southern Indiana
Photos: Gallery
Posts: 14,963
I am much more concerned by the high noise levels coming from uninformed people than I am about any news I've heard about the K-7.
06-09-2009, 12:30 AM   #10
Pentaxian
gazonk's Avatar

Join Date: Feb 2009
Location: Oslo area, Norway
Photos: Gallery | Albums
Posts: 3,509
QuoteOriginally posted by Rondec Quote
I am much more concerned by the high noise levels coming from uninformed people than I am about any news I've heard about the K-7.
good one

But you shouldn't really worry about any of the two!
06-09-2009, 12:44 AM   #11
Pentaxian
gazonk's Avatar

Join Date: Feb 2009
Location: Oslo area, Norway
Photos: Gallery | Albums
Posts: 3,509
QuoteOriginally posted by hinman Quote
I am not a pixel peeper. I really don't see what you are concerned about. The original seem to come from this flickr account. I am quite pleased with the photos.

Pentax K-7 - a set on Flickr

Thanks,
Hin
Thanks for the link, Hin. The full version of the image I commented on looks very good to me. Not quite the way I would have processed it (but then I don't like "Bright mode" which is used here), but I pushed the shadows to ridiculous levels without seeing any noise, so my initial impression is very, very good.

In fact, I wonder if it has even lower noise in the shadows than my K10D at ISO 100. (If the K-7 is better than the K10D at low ISO and better than the K20D at high ISO, CBA will be hard to resist!)
06-09-2009, 07:55 AM   #12
New Member




Join Date: Jun 2009
Location: Seattle WA
Posts: 16
I agree with your concerns, by the way and hope the final firmware is better. Even that awesome iguana shot from Frank has a lot of noise to my eyes at 100%

Mark
06-09-2009, 08:13 AM   #13
Veteran Member




Join Date: Nov 2006
Location: Hong Kong
Posts: 1,934
To Compare..

You need to view the K-7 image at 80% if you view the K10 image at 100% as the pixel counts are different.

In fact, I like the image from K-7 better, the highlight handling is just more updated and "modern" whilst the K10D has to underexpose the scene to keep the highlight details, which resulted in a dark overall picture.

As for the noise in the blue sky, I don't find much difference between the two.

QuoteOriginally posted by claude21 Quote
I've looked at some K-7 pictures taken recently (firmware v0.35) and honestly I'm a bit worried about final images quality. Even at iso 100, there is high amount of noise especially in shadows, plus some vertical banding (@100iso) ! the overall K-7 samples look softer than K10D. I remember the k20d was problematic too. This is the same place, but not with same angle.

File-Upload.eu - Your free file hoster!

here is K-7, 100 iso, 28mm M prime lens
image moved to zip file

here is K10D, 100 iso, 50mm M prime (chinon) lens (no sharpening applied)
image moved to zip file

Waiting to have some final firmware images but, if it doesn't improve at low (base) iso, this camera is definitly not an upgrade for me.
06-09-2009, 09:17 AM   #14
Veteran Member




Join Date: Dec 2007
Posts: 923
Even with pixel-peeping in the shadows, I couldn't see what's wrong with the K-7 image.

If anything, I think the K-7 shot was taken in brighter sunlight than the earlier K10D shot, higher dynamic range (brighter highlights, deeper shadows).
A more challenging shot for the camera, and it handled it well.
06-09-2009, 05:09 PM   #15
Pentaxian
falconeye's Avatar

Join Date: Jan 2008
Location: Munich, Alps, Germany
Photos: Gallery
Posts: 6,862
QuoteOriginally posted by claude21 Quote
I've looked at some K-7 pictures taken recently (firmware v0.35) and honestly I'm a bit worried about final images quality. Even at iso 100, there is high amount of noise especially in shadows, plus some vertical banding (@100iso) ! the overall K-7 samples look softer than K10D.
Doing a head-to-head comparison of images from K-7 vs. K20D, same subject, same lens, same RAW conversion, is high up on my list. Probably to be done this week end.

Partly because of threads like this. I'll also run higher iso tests later this month when the updated firmware gets available.

From what I've seen so far, I think that banding is a non issue with K-7. I'll research this more as well, when doing my iso tests.
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, image, iso, k-7, k-7 image quality, k10d, lens, nikon, pentax, photography, sharpness
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Are you satisfied with the K-x image quality? rjm Pentax DSLR Discussion 37 01-21-2010 06:27 AM
How can I get good image quality from a K-x?? Manfred Troubleshooting and Beginner Help 38 12-20-2009 08:18 PM
K or M Series - Which has the best image quality 8540tomg Pentax SLR Lens Discussion 20 10-05-2009 07:53 AM
DA 16-45mm image quality sveinmb Pentax SLR Lens Discussion 25 09-18-2008 03:58 PM
Some concern about image quality. Bart Pentax SLR Lens Discussion 17 07-23-2007 05:54 PM



All times are GMT -7. The time now is 12:53 PM. | See also: NikonForums.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