Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
02-24-2010, 12:29 PM   #31
Veteran Member
GoremanX's Avatar

Join Date: Dec 2009
Location: Georgia, VT
Photos: Albums
Posts: 1,652
Original Poster
QuoteOriginally posted by Nass Quote
So DFS is a bit of a wrong assumption then, what I should simply request is that noise removal be turn offable at > 30 seconds too.

^^ is that correct/better/clearer?

Appreciate that's tricky, might make for icky results, but that's a choice I'm prepared to live with!
No, definitely DFS is what we want to be able to disable. The DFS is what's doubling our exposure time for shots over 30 seconds. Your petition wording is perfectly fine.

What the DFS actually gets used for is what we're debating

02-24-2010, 12:36 PM   #32
Senior Moderator
Loyal Site Supporter
Nass's Avatar

Join Date: Aug 2009
Location: The British Isles
Photos: Gallery
Posts: 2,212
For what it's worth, I called up Pentax today about it. That person has logged it with Japan, but actually suggested I get some online people behind the request. The more interest that's shown in this, the more serious they'll take it... understandable.
02-24-2010, 12:45 PM   #33
Veteran Member
GoremanX's Avatar

Join Date: Dec 2009
Location: Georgia, VT
Photos: Albums
Posts: 1,652
Original Poster
I just re-read the petition text, and here are some spelling corrections that are needed:

We have a very simple request for an additional firmware option to do with Dark Frame Subtraction "DFS" on the dSLRs on which it is mandatory for exposures in Bulb mode over 30 seconds (ie your flagship model the K-7). Please could you issue, in a future firmware oupdate, an option to be able to turn this off as and when we'd like to?

The problem we face is this: we can only make half as many images with your great cameras as other brands, because at the end of a long exposure... the camera makes itself do another one (the inbuilt DFS). This has ramifications for astro-photography, night photography and long exposure photography, amongst others.

We love your cameras and we've bought into your system, but this one little thing just ruins our day!


(as far as I can tell, DFS is only enabled in Bulb mode and only when the exposure is longer than 30 seconds)
02-24-2010, 12:47 PM   #34
Inactive Account




Join Date: Nov 2008
Location: USA
Posts: 924
Dark frame subtraction - Wikipedia, the free encyclopedia

02-24-2010, 12:50 PM   #35
Veteran Member
GoremanX's Avatar

Join Date: Dec 2009
Location: Georgia, VT
Photos: Albums
Posts: 1,652
Original Poster
Hey look! The same page my quote came from!
02-24-2010, 12:52 PM   #36
Senior Moderator
Loyal Site Supporter
Nass's Avatar

Join Date: Aug 2009
Location: The British Isles
Photos: Gallery
Posts: 2,212
Can't edit, you can only add
02-24-2010, 01:01 PM   #37
Inactive Account




Join Date: Nov 2008
Location: USA
Posts: 924
Fixed pattern noise is not hot pixels. I've had experience with noise in both CCD and CMOS sensors. It gets horrid in long exposures without extra cooling. And Pentax isn't about to install a cooler. Nor will they tell folks that the long exposure photos look like dog crap, without DFS. So they cover their ass by making it mandatory. Then they don't have to explain to the average plodder why their $1,000.00 camera photos need extra work.
02-24-2010, 01:08 PM   #38
Veteran Member
GoremanX's Avatar

Join Date: Dec 2009
Location: Georgia, VT
Photos: Albums
Posts: 1,652
Original Poster
QuoteOriginally posted by wildlifephotog Quote
Fixed pattern noise is not hot pixels. I've had experience with noise in both CCD and CMOS sensors. It gets horrid in long exposures without extra cooling. And Pentax isn't about to install a cooler. Nor will they tell folks that the long exposure photos look like dog crap, without DFS. So they cover their ass by making it mandatory. Then they don't have to explain to the average plodder why their $1,000.00 camera photos need extra work.
You know what else looks like crap? ISO 6400 on a K-7 without noise reduction. THAT looks atrocious. And yet it's possible, since some photographers would rather do their own noise reduction than let the camera do it for them. Pentax allows this by offering specific options in the camera. The *ability* to disable DFS is EXACTLY THE SAME THING! Your reasoning makes no sense at all.

02-24-2010, 01:21 PM   #39
Senior Moderator
Loyal Site Supporter
Nass's Avatar

Join Date: Aug 2009
Location: The British Isles
Photos: Gallery
Posts: 2,212
QuoteOriginally posted by GoremanX Quote
You know what else looks like crap? ISO 6400 on a K-7 without noise reduction. THAT looks atrocious. And yet it's possible, since some photographers would rather do their own noise reduction than let the camera do it for them. Pentax allows this by offering specific options in the camera. The *ability* to disable DFS is EXACTLY THE SAME THING! Your reasoning makes no sense at all.
GoremanX said it better than me. Just let us choose... Pentax doesn't delete the RAW if it "dislikes" the image either... plenty of crap images on any camera... but it's OUR crap
02-24-2010, 01:23 PM   #40
Inactive Account




Join Date: Nov 2008
Location: USA
Posts: 924
It's not my reasoning. It's their probable reasoning for ultimate marketing to the world's average shooter. I bought a K200D just so I could turn all the crud off.
Long exposure, more than 30 seconds, is not the norm.
I've sat and shot 390 photos in 6.5 hours. I wouldn't attempt a third of that with a K7 while hand guiding. And I'm sure Pentax would think I was a whacked out nut.
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!
bulb, camera, dslr, frame, minute, mode, photography, picture, pixels, shot
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
K200D, Bulb mode and the remote CookieMonster Troubleshooting and Beginner Help 7 09-16-2010 06:49 AM
Night Bulb mode startrails.. a question really bergmania Post Your Photos! 2 12-02-2009 04:23 AM
Incorrect bulb mode function? reytor Troubleshooting and Beginner Help 8 09-05-2009 07:26 PM
Aperture in Bulb mode? ismaelg Troubleshooting and Beginner Help 15 04-21-2009 11:52 PM
Bulb mode settings switch79 Photographic Technique 9 06-21-2007 05:45 PM



All times are GMT -7. The time now is 10:41 AM. | 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