Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
11-27-2009, 06:58 PM   #1
Junior Member
fusionimaging's Avatar

Join Date: Nov 2009
Location: Colorado
Posts: 36
Exposure Time

Hey guys,
I was wondering if there is any way to program my k20 to shoot a 2 min. or longer exposure? I'm pretty sure there is way, as I have heard people doing 1-2 hour exposures, but I can't seem to figure out how. Thanks in advance.

11-27-2009, 07:31 PM   #2
Junior Member




Join Date: Aug 2009
Location: Georgia
Posts: 48
You must use the "Bulb" mode for exposure times greater than 30 seconds. You can't "program" an exposure time in this mode. The shutter remains open for as long as the shutter release button is depressed. Or, you can use a remote with a locking button.
11-28-2009, 10:46 AM   #3
Inactive Account




Join Date: Oct 2008
Location: Rochester, NY
Photos: Gallery | Albums
Posts: 119
Set the camera to B for bulb mode and you pretty much have to use a stopwatch as a reference for longer exposures. Mind you if you're going that long you're probably set to a low ISO and the difference of a few seconds or even minutes when you get into hour long exposures is not a huge difference.

Bear in mind though that the K20 defaults to a frame subtraction which means the camera will be occupied taking a second black frame of equal length. So a 1 hr exposure means the camera won't be available for a second frame until 2 hrs later. A few people have gotten around this by taking multiple 29 sec frames and then stacking them in photoshop. Just something to keep in mind.
11-28-2009, 01:15 PM   #4
Ash
Community Manager
Loyal Site Supporter
Ash's Avatar

Join Date: Mar 2007
Location: Toowoomba, Queensland
Photos: Gallery | Albums
Posts: 22,679
Get a cable release that has a lock down shutter release feature.
Then with stopwatch/alarm (or just plain old watch) in hand, lock the shutter open in Bulb mode and wait...

11-28-2009, 02:20 PM   #5
Junior Member
fusionimaging's Avatar

Join Date: Nov 2009
Location: Colorado
Posts: 36
Original Poster
Ok, I'll look into a remote with a lock feature. Thanks for the info guys.
11-29-2009, 01:31 PM   #7
Junior Member
fusionimaging's Avatar

Join Date: Nov 2009
Location: Colorado
Posts: 36
Original Poster

Awesome! Thanks for the info.
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, exposure, pentax help, photography
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
how to bracket exposure time? Urmas R. Pentax DSLR Discussion 4 02-01-2010 07:31 AM
K20d/K7 maximium exposure time? Luke_ Pentax DSLR Discussion 3 09-21-2009 10:53 AM
Long time exposure must use NR? yipchunyu Pentax DSLR Discussion 21 06-21-2009 05:08 PM
Trouble with Exposure Time jcleary47 Photographic Technique 7 06-17-2008 04:24 AM
Exposure time limitation while using manual lenses? ruff Pentax DSLR Discussion 9 05-20-2008 03:02 PM



All times are GMT -7. The time now is 12:16 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