Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
04-26-2016, 04:35 PM   #1
Site Supporter

Join Date: Feb 2011
Location: Thessaloniki
Posts: 12
Pentax K-S2 and Astrotracer


I consider buying the K-S2 with Pentax O-GPS1 in order to move light and take wide-field astrophotography shots.
I am aware that initially the Astrotracer function was problematic in K-S2 but later Ricoh-Pentax claimed that a software update solves the issue.
Is there anyone to confirm the flawless operation of Astrotracer on K-S2 now?
Furthermore, which IR remote control would you recommend for long exposures (up to 5 minutes or even more) in Bulb mode?
Is there indeed a way to do this (up to 5 min exposure) just with K-S2's menu settings and without an IR remote at all?

And finally, should I consider another body as well, such as the K3II (or even a used Kr, K5 ...) for better performance of the Astrotracer?

Thank you in advance,

04-26-2016, 05:10 PM   #2

Join Date: Sep 2012
Location: NY
Photos: Gallery
Posts: 2,389
With camera menu settings in Manual mode I can go up to 30 seconds with the shutter speed without the use of a remote or wired remote switch, and also utilize the 2 second delay camera feature to avoid camera shake during a long exposure.

If you want to do longer exposures than 30 seconds you will need to be in Bulb mode and have a remote device (shutter control) to avoid camera shake.

The IR remotes are battery dependent and may lose power quickly in lower temperatures. That is why I have a wired remote that plugs into the camera and derives its power from the camera battery. A shortcut to the wired remote I have is below. I use it with my K-3II or K-5IIS.

Vello RS-C1II Wired Remote Switch for Select Cameras RS-C1II B&H

Last edited by C_Jones; 04-26-2016 at 06:45 PM.
04-26-2016, 05:19 PM   #3
Site Supporter

Join Date: Mar 2008
Location: Prince George, BC
Photos: Gallery
Posts: 2,342
All Pentax DSLRs go up to 30 seconds in manual mode. You will need Bulb mode for anything longer. IR remote shutter triggers are very useful as are wired cable releases for Bulb mode work.
04-26-2016, 07:15 PM   #4
Site Webmaster
Adam's Avatar

Join Date: Sep 2006
Location: Arizona
Photos: Gallery | Albums
Posts: 43,036
QuoteOriginally posted by jbinpg Quote
All Pentax DSLRs go up to 30 seconds in manual mode. You will need Bulb mode for anything longer. IR remote shutter triggers are very useful as are wired cable releases for Bulb mode work.
In astrotracer mode, shutter speeds up to 300s are selectable

Regarding the astrotracer's accuracy, it does require calibration and degrades at longer shutter speeds. Just something to keep in mind.

Adam Webmaster (Site Usage Guide | Site Help | My Photography)'s high server and development costs are user-supported. You can help cover those costs by donating. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:


  • 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!
astrophotography, astrotracer, camera, control, dslr, ir, k-s2, long-exposure, pentax, pentax k-s2, photography, release, remote, shutter
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
For Sale: Instantly download your Pentax eBook! (K-1, K-70,K-3, K-5, K-50, K-S2 and more DSLRs) ebooks4pentax Photographic Equipment for Sale 105 09-28-2017 06:53 PM
Questions re: K-3 II pixel shift and Astrotracer gazelle01 Pentax K-3 102 03-06-2017 06:23 PM
Astrotracer on K-S2 srdjanmax Pentax K-S1 & K-S2 13 04-11-2016 03:23 PM
Pentax k-s2 only body 399$ Black and White niko83 Pentax Price Watch 3 09-03-2015 05:07 AM
Pentax Full Frame and K-S2 images from CP+ Yokohama Vizke Pentax DSLR Discussion 35 02-13-2015 12:52 PM

All times are GMT -7. The time now is 12:17 PM. | 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]