Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
07-05-2010, 01:58 PM   #151
Veteran Member
LeeRunge's Avatar

Join Date: Jun 2010
Location: Utah, USA
Posts: 310
I am new to the K-7 and have been doing a lot of night shooting with Bulb and a remote over 30 seconds. You have to basically wait the shutter time x2 to get a shot, so a 10 minute shot is a 20 minute shot. So you miss all the action waiting on the camera. I was trying to get shots of a firefight a few nights ago and only got a few tracers flying around, it would have made for a cool shot.

07-11-2010, 12:35 AM   #152
Site Supporter
pentaxmz's Avatar

Join Date: Dec 2008
Location: Seattle
Posts: 659
Original Poster
QuoteOriginally posted by Freak Quote
Here there is a huge market of modding 5DMKII's with cooling fans for Astrophotoraphy, You only have to do a google search to see the problems are huge on the Canons on anything over 8mins. So for me the same issues continued without after market cooling.
I know little about the 5DMKII cameras but I can certainly tell you that the Canon 30D - 50D's are absolutely excellent for long exposures.... and certainly superior to any other digital camera in this class (or perhaps any class).

QuoteOriginally posted by Freak Quote
Nobody has said anything that i did not, I think it should be an option on the Pentax to turn it off... And never claimed otherwise, to pretend this is only a Pentax issue however is incorrect.
Well, when comparing to Canon and Nikon, yes... this is definitely a problem with only the Pentax K20D and K7.

QuoteOriginally posted by Freak Quote
As for Pentax, Why don't you turn the Camera off and avoid the DFS?
As clearly indicated throughout this thread, this is not possible with either the K20D or the K7. It is speculated that DFS is forced on these cameras b/c the Samsung CMOS imager has an unusually high amount of noise b/c of excessive heat generated.
07-12-2010, 02:17 PM   #153
Site Supporter
LeoTaylor's Avatar

Join Date: Feb 2007
Location: Connecticut
Photos: Gallery
Posts: 679

I didn't notice this thread had restarted, the last time I posted here was about seven months ago.

PENTAXMZ, I'm saddened to read you might be leaving us for Canon. The 5D MKII is the Cadillac of astro DSLRs. I saw one demonstrated by Mike Unsold at NorthEast Astro Forum and I was impressed. But then for the amount you paid and will pay for lenses you could buy Pentax Corp!

One reason I may never move past my K100D variations is I want to have the option of turning off NR and doing my own dark frames. I actually use the internal NR but want the freedom to chose.

Another option vs a Canon 5 is a real astro camera. In the Spring I bought an SBIG ST4000XCM One-Shot-Color. So far I'm impressed, I'm back to maintaining a library of reusable Darks, real cooling (not a fan slapped on but a Peltier cell directly cooling the sensor, sealed chamber with desiccant (needed when you cool below freezing), ability to take darks with the shutter closed (no need to be present and cap the lens/scope), self guiding with a second sensor, and so on.

My modified K110D has not been used in awhile!

Leo Taylor

Last edited by LeoTaylor; 07-12-2010 at 02:19 PM. Reason: typos
07-13-2010, 07:22 AM   #154
New Member
James also's Avatar

Join Date: Mar 2010
Location: Victoria
Photos: Gallery
Posts: 24
Good luck PentaxMZ

As far as I can see this is just a bit of Pentax knowing better than their clients. Surely it would take very little to give the owner of the camera the option of turning off this function. If we didn't like the results then we would turn the function back on. I have not been trying to take multiple exposures of longer than 30 sec so it has not affected me as yet. It is good to know the limitations of the camera in advance.

I'd say that you have a legitimate gripe, which in the future may become mine.

The reason for the thread was to discuss a concern not to be told to take your buisness elsewhere.


07-14-2010, 06:53 PM   #155
Veteran Member

Join Date: Dec 2007
Posts: 923
There's probably a K-7 successor coming in 6 months to a year....lets see how it goes...

Pentax generally has a good record responding to user feedback over successive bodies, but I'm not sure if this particular issue is in the "too hard" category with their current series of sensors...

  • 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, dfs, dslr, exposure, exposures, k7, mode, photography, vote
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
Nature Long exposures at the beach ismaelg Post Your Photos! 8 04-20-2010 10:39 PM
Cityscape Long Exposures attack11 Post Your Photos! 6 01-20-2010 01:49 PM
K20d - long exposures Luke_ Pentax DSLR Discussion 5 07-28-2009 05:30 AM
Long Exposures Dancing metroeloise Post Your Photos! 3 01-07-2009 04:35 PM
Long exposures. blwnhr Post Your Photos! 12 08-05-2008 03:36 AM

All times are GMT -7. The time now is 04:45 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]