Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
01-01-2008, 11:21 AM   #1
Veteran Member
Workingdog's Avatar

Join Date: Dec 2007
Location: York, PA
Photos: Gallery
Posts: 726
Shake Reduction Question

The question came up in the "post your photos" forum about the affect of having shake reduction "on" vs. "off" when panning with the K10D. The manual goes into a few scenarios where the SR may not fully function and recommends "off" when using a tripod, but nothing about panning. Can anyone enlighten me? Is SR "on" during panning good, bad, or makes no difference?
If nobody can answer, I will do an experiment and post the results. It would go something like this: 4 pictures
lens at 200 mm
#1 - f6.3, 1/800 sec, SR on
#2 - f6.3, 1/800 sec, SR off
#3 - f14, 1/100 sec, SR on
#4 - f14, 1/100 sec, SR off

01-01-2008, 12:47 PM   #2
Veteran Member
Rickster's Avatar

Join Date: Jun 2007
Location: SE Idaho - Rocky Mtns
Posts: 433
Shake Reduction can minimize small movements in the camera characterized by small accelerations. A smooth pan will only have 2 accelerations. one when you start the pan and one when you stop the pan. If your shutter is opened after the start of the pan and closed before the end of the pan, all the SR can do is minimize the non-linear parts of the pan.

cheers,
Rick
01-01-2008, 02:13 PM   #3
Pentaxian
Lowell Goudge's Avatar

Join Date: Jan 2007
Location: Toronto
Photos: Gallery | Albums
Posts: 15,314
as rickster points out, as long as the pan is smooth, shake reduction will not cause any problems, and would be useful because even if the pan is smooth in the horizontal, the K10 for example has rotational and vertical shake also.

Perhaps this is something for pentax to consider,. someone else, I think sony has the ablilty to turn off the horizontal mode of shake reduction to allow for panning.

Maybe a future upgrade.
01-01-2008, 02:51 PM   #4
Veteran Member
jgredline's Avatar

Join Date: Oct 2007
Location: LosAngeles, Ca.
Photos: Albums
Posts: 10,531
Perhaps I am alone, but I could swear that with shake reduction on in my 100dsuper, it really slows up. With it off it speeds up. I do not notice that much of a difference on the K10D

01-02-2008, 07:16 AM   #5
Veteran Member
JCSullivan's Avatar

Join Date: Sep 2006
Location: Windsor, Canada
Posts: 3,058
I guess I'm the one that originally suggested switching-off the SR figuring that, if the camera is moving on purpose, the SR would be defeating its purpose.

Again, it was only a suggestion on my part but, you could test-it-out no matter what.
01-02-2008, 08:10 AM   #6
Veteran Member
Rickster's Avatar

Join Date: Jun 2007
Location: SE Idaho - Rocky Mtns
Posts: 433
QuoteOriginally posted by JCSullivan Quote
I guess I'm the one that originally suggested switching-off the SR figuring that, if the camera is moving on purpose, the SR would be defeating its purpose.

Again, it was only a suggestion on my part but, you could test-it-out no matter what.
We could probably cobble up a test or two using a laser pointer to determine the efficacy of SR while panning.
01-02-2008, 09:51 AM   #7
Veteran Member
Workingdog's Avatar

Join Date: Dec 2007
Location: York, PA
Photos: Gallery
Posts: 726
Original Poster
Rick,

The laser pointer test sounds interesting. What will we see with SR on vs. SR off; a dot, a straight line, a wavy line? That would be an indicator of what's going on, or not going on.
01-02-2008, 11:18 AM   #8
Veteran Member
Rickster's Avatar

Join Date: Jun 2007
Location: SE Idaho - Rocky Mtns
Posts: 433
QuoteOriginally posted by Workingdog Quote
Rick,

The laser pointer test sounds interesting. What will we see with SR on vs. SR off; a dot, a straight line, a wavy line? That would be an indicator of what's going on, or not going on.
If the laser is attached to the camera and SR is off you should see a dot. When SR is turned on you should see the relative motion of the CCD to the laser. (I think) If the laser is mounted on a tripod and swept horizontally you would see a line or if panning a dot. The presence or lack of "wriggles" in the captured image should give an indication of the SR effect.

OK ... I did a quick and dirty test ... I was panning in both images a plain wall.

Here's the image with SR off ... as expected there is a dot (the laser is a cheapie so the dot is not perfectly round)



Here's the image with SR on - we can see the camera shifted the CCD to compensate for hand shake.




Last edited by Rickster; 01-02-2008 at 07:32 PM.
01-02-2008, 12:10 PM   #9
Senior Member




Join Date: Jul 2007
Location: Maaseik, Belgium
Photos: Gallery
Posts: 157
This picture is made panning with SR on.

Guido

01-02-2008, 12:23 PM   #10
Site Supporter
SpecialK's Avatar

Join Date: Dec 2006
Location: So California
Photos: Gallery
Posts: 14,441
The KHundredD manual recommends turning off SR while panning at slow shutter speeds - and fails to indicate what a "slow" shutter speed is...

I noticed some odd effects when testing SR at about 90th and slower with SR on.
01-02-2008, 12:57 PM   #11
Forum Member




Join Date: Aug 2007
Location: San Jose, Ca.
Posts: 78
Anyone know why the manual recomends turning SR off while using a tripod? On occasion, I have forgotten to turn it off and don't seem to notice any ill effects? Any ideas or has anyone noticed any problems?
01-02-2008, 01:19 PM   #12
Veteran Member
Jodokast96's Avatar

Join Date: Oct 2007
Location: Erial, NJ USA
Photos: Gallery | Albums
Posts: 2,133
The lack of movement from using a tripod could throw off the SR and cause it to hunt.
01-02-2008, 01:37 PM   #13
Pentaxian
Lowell Goudge's Avatar

Join Date: Jan 2007
Location: Toronto
Photos: Gallery | Albums
Posts: 15,314
QuoteOriginally posted by AV82GOLF Quote
Anyone know why the manual recomends turning SR off while using a tripod? On occasion, I have forgotten to turn it off and don't seem to notice any ill effects? Any ideas or has anyone noticed any problems?
there are different, and not compensated properly vibrations at high frequency on a tripod.
01-02-2008, 01:54 PM   #14
Veteran Member
jgredline's Avatar

Join Date: Oct 2007
Location: LosAngeles, Ca.
Photos: Albums
Posts: 10,531
You know. My first Pentax was the K110D (no shake reduction) and at first my pictures were a little bit shaky to say the least, but after a half year or so, It forced me or taught me how to properly hold my camera and now I get some really good sharp pics with it. In fact now on my 100dsuper and K10D i normally have it off now as I enjoy the faster auto focus more than the shake reduction. Now the only time I use the anti shake is when I am using a lens longer than 250mm...Other wise it is off...

When I have talked with folks who own the 1st ds as well, they too get some great pics as do film photographers who got used to not having the anti shake...
01-02-2008, 06:22 PM   #15
Veteran Member
Workingdog's Avatar

Join Date: Dec 2007
Location: York, PA
Photos: Gallery
Posts: 726
Original Poster
JG, so you're saying that the AF is definitely quicker with SR turned off? What about fps?

Rickster, can we see that laser test with the laser panning on a tripod and you following it with the camera handheld?
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, dslr, f14, f6.3, photography, question, reduction, sec, sr
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
K-x shake reduction question Coby Video and Pentax HDSLRs 2 01-06-2010 09:21 AM
Shake reduction julianactive Pentax SLR Lens Discussion 2 05-06-2009 04:13 PM
shake reduction oatman911 Pentax DSLR Discussion 17 03-07-2009 04:38 AM
k20d + manual lens, tricky shake reduction question! Isaac314 Pentax DSLR Discussion 2 09-03-2008 09:35 AM
Thank you Shake Reduction! tcdk Post Your Photos! 4 09-03-2008 09:29 AM



All times are GMT -7. The time now is 08:04 PM. | 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