Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
12-03-2011, 04:57 AM   #1051
Site Supporter




Join Date: Mar 2009
Location: Gladys, Virginia
Photos: Gallery
Posts: 16,250
Iso 6400 with K5



Really low light -- iso 12800, f2.8, 1/20 second



12-03-2011, 10:06 AM   #1052
Pentaxian
zantaphia's Avatar

Join Date: Mar 2011
Location: Skövde, Skaraborg
Photos: Gallery | Albums
Posts: 497
Night scene from Sweden

Pentax K-5, 18-55 WR:
f/4
1/80 sek
ISO 6400
Center Weighted Average
Shutter priority


12-03-2011, 10:11 AM   #1053
Veteran Member




Join Date: Oct 2010
Location: Baltimore
Posts: 2,542
Kx + Kit Lens 18-55

@ ISO3200

12-03-2011, 08:48 PM   #1054
Pentaxian
Marc Sabatella's Avatar

Join Date: Sep 2006
Location: Denver, CO
Photos: Gallery
Posts: 10,686
K200D at push-processed equivalent of ISO 6400:



12-04-2011, 07:53 AM   #1055
Veteran Member




Join Date: Oct 2010
Location: Baltimore
Posts: 2,542
Kx + Super Takumar 50/1.4

@ ISO3200

12-04-2011, 04:11 PM   #1056
Senior Member




Join Date: Jun 2008
Location: Springdale, Arkansas
Photos: Gallery
Posts: 112
I really like what you do with the K200D. That's what I've got too. But how do you push it to 6400? Do you up the EV value?
12-05-2011, 05:15 AM   #1057
Site Supporter




Join Date: Mar 2009
Location: Gladys, Virginia
Photos: Gallery
Posts: 16,250
QuoteOriginally posted by krmitchell1055 Quote
I really like what you do with the K200D. That's what I've got too. But how do you push it to 6400? Do you up the EV value?
What Marc does is deliberately underexposes by a stop or two and then in postprocessing pushes the exposure up. So shooting at iso 1600 and then pushing two stops gets you to iso 6400. If you want to do this using EV, you would actually dial in EV -2 and then push it when developing the RAW photo.

Truthfully, that is all that most cameras are doing anyway above iso 1600. I don't think any Pentax cameras shoot over iso 1600 with sensor gain, they just start using software manipulation to underexpose and then push process the photo. Some sensors are more tolerant of such manipulation than others.
12-06-2011, 04:14 PM - 1 Like   #1058
Pentaxian
Marc Sabatella's Avatar

Join Date: Sep 2006
Location: Denver, CO
Photos: Gallery
Posts: 10,686
Yep, although I'm actually shooting M mode virtually all the time, so EV compensation doesn't come in to play for me. In concert photography and other low light settings, I just open the lens wide open, set the slowest shutter speed I think I can get away with given the focal length I am shooting and the amount of subject motion, and accept whatever underexpose I end up with, knowing I can push it in PP. It's kind of like TAv mode on the higher end cameras, except instead of the camera choosing how much to push the image (by raising ISO), I am basically making that same choice after the fact. Works better, I think, as the camera would tend to be fairly inconsistent, varying exposure based on irrelevant details like whether the subject's shirt is white or black, whether the subject is centered in the frame or not, whether a spotlight appears in the frame or not, etc. Whereas my way gives me pretty consistent exposure, so if I make an adjustment to one picture in PP, I can pretty much copy it to the rest of that batch.

As for the PP involved, it's just a simple brightening, combined with judicious use of NR and sharpening. You definitely want to be shooting RAW if you plan on doing this much, as a two-stop push in PP basically means losing two out of the eight bits of data if you are starting from JPEG. That's going to result in quite a loss of detail as well as dynamic range. With RAW - which is 12 bits on the K200D - there really is a surprisingly decent amount of detail to start with in the image. I find that most of the noise that results is "chroma noise" - colored specks - and PP software is usually pretty good at reducing that without killing off too much more detail.

I'm currently using ACDSee Pro 5 for my PP, and it has a nice new feature where you can adjust the sharpening to not affect areas that are not well-defined edges. This means the noise in the more featureless areas is not sharpened, which in turn allows to sharpen more normally to bring out more detail in the edges without increasing noise, as opposed to having to back off on the sharpening as one might normally do with high ISO images. While the fancier NR tools in Lightroom or in dedicated plugins like the one from Topaz can produce better results still, I rather like the look of the images I'm getting from ACDSee Pro 5 these days, to the point where I'm less and less afraid to push as far as ISO 6400. Used to be it was rare I'd get anything I felt like showing anyone, but now it's almost more the rule than the exception. I guess I'm also becoming less and less focused on noise, though.

12-06-2011, 06:05 PM   #1059
Veteran Member




Join Date: Oct 2010
Location: Baltimore
Posts: 2,542
Kx + Tamron AF 28-80/3.5-5.6

@ ISO 6400

12-07-2011, 01:51 AM   #1060
Veteran Member
Don From The Radio's Avatar

Join Date: Jul 2011
Location: Delaware
Photos: Gallery | Albums
Posts: 344
K-5, ISO 3200
1/2000, f/1.4 on a Sigma 30


Last edited by Don From The Radio; 12-07-2011 at 02:15 AM.
12-07-2011, 07:56 AM   #1061
Junior Member




Join Date: May 2011
Location: Bucks County, Pennsylvania
Photos: Albums
Posts: 43
So, Marc, you just keep the ISO set at 1600 in low-light/concert shooting?
12-07-2011, 12:34 PM   #1062
Pentaxian




Join Date: Feb 2011
Location: Hoek van Holland
Photos: Gallery | Albums
Posts: 1,252
QuoteOriginally posted by Don From The Radio Quote
K-5, ISO 3200
1/2000, f/1.4 on a Sigma 30

I like the shot, just wondering. Why ISO3200 if you still had room with your shutter speed?
12-07-2011, 01:04 PM   #1063
Pentaxian
Marc Sabatella's Avatar

Join Date: Sep 2006
Location: Denver, CO
Photos: Gallery
Posts: 10,686
QuoteOriginally posted by spanky Quote
So, Marc, you just keep the ISO set at 1600 in low-light/concert shooting?
Yes, in part because that's as high as the K200D goes. Otherwise I might try something between there and 3200. In most environments, shots tend to end up being underexposed maybe half a stop when shooting f/2.8 and 1/45" (a typical exposure setting for me). But of course the actual exposure varies according to lighting, and I don't leave shutter speed locked at 1/45", either - could be anywhere from 1/30" to 1/90". So if the lighting is unusually dim, and/or I need to go the 1/90" because my subject is moving more than usual, that's when I tend to need as much as a two stop push.
12-08-2011, 02:33 PM   #1064
Pentaxian




Join Date: May 2008
Location: Seattle, WA
Posts: 1,378
Marc, that's crazy but good. I've started using my K200D again for concerts and it works great. One thing that you do that I do not is use manual lenses which makes your job more difficult. Well done.
12-09-2011, 08:32 PM   #1065
Veteran Member




Join Date: Oct 2010
Location: Baltimore
Posts: 2,542
Kx + Super Takumar 50/1.4

@ ISO4000

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, dolphin, dslr, flickr, gallery, iso, photography, post
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
How to post high resolution photo here? Underbridge Pentax Medium Format 5 12-25-2012 08:56 PM
People K-5 high ISO... how high can we really go... igor Post Your Photos! 2 03-24-2012 01:10 AM
Is there a high iso gallery for K-7? justtakingpics Pentax DSLR Discussion 13 05-31-2010 05:32 PM
K-7 high ISO vs K20D high ISO supa007 Pentax DSLR Discussion 72 05-10-2010 04:24 PM
Pentax k20d High ISO Photo Gallery PentaxPoke Pentax DSLR Discussion 68 02-18-2009 05:19 AM



All times are GMT -7. The time now is 09:51 PM. | 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