Forgot Password
Pentax Camera Forums Home
 

View Poll Results: Have you noticed blurred image and/or double image with your K-x
Yes 7435.07%
No 13764.93%
Voters: 211. You may not vote on this poll

Reply
Show Printable Version Search this Thread
10-30-2010, 06:06 AM   #76
Pentaxian
bobmaxja's Avatar

Join Date: Mar 2010
Location: Laval, Quebec Canada
Posts: 1,736
I took over 2000 photo with mine, never say that. I am extremely happy with my K-X

10-31-2010, 07:28 AM   #77
Senior Member




Join Date: Oct 2008
Location: NYC
Posts: 258
After tried 2 K-x bodies (black and White) on 2 different Tamron Lenses (17-55mm and 28-75mm) on 2 trips with unsatisfied blur photos. I compared the K-x by using both lens on the old K10D, I confirmed that the the mirror slap is a real issue. When I was using the k-x outdoor with smaller aperture and exposure over 1/150, everything looked good. I guess that was why the 18-55mm kit lens works better with the k-x. But when I tried to use bigger aperture F2.8 and at exposure under 1/100, I was able to see the blur when zoom into 1:1 ratio. Same issue with SR on and off. This happened over 30% of my photos from those 2 trips. So, I guess that loud mirror slap did cause some image issue. At less When I used my K10D with the same lenses, I don't see any of these issue at all, even at exposure under 1/20. I guess that was why I went back to the K10D.
11-03-2010, 04:24 PM   #78
New Member




Join Date: Apr 2010
Location: Pequannock
Posts: 16
Looks like I have not posted my test results here

http://i824.photobucket.com/albums/zz165/akpch/test/mirror_shake_k-x.jpg

Second copy I have now is not that bad. I keep taking it with me instead of my Canon 400D. With first copy it put me out so bad I could not use for 6 mo.
11-03-2010, 04:51 PM   #79
Veteran Member
Eruditass's Avatar

Join Date: Jul 2009
Location: Pittsburgh, PA
Photos: Gallery | Albums
Posts: 2,206
QuoteOriginally posted by beethovenspiano Quote
It has put me off buying one.
Luckily I was an early adopter so I was not put off (probably would've been) because no one knew and didn't get one with a problem. One of my favorite buying decisions, though

12-06-2010, 01:51 PM   #80
New Member




Join Date: Dec 2010
Location: Vigo
Posts: 2
Hi everybody,

I've made a quick test and, altought it must be corroborated by some extensive testing, I think that the blurry images are somehow related with the battery quality:

Equipment:
K-x with Tamron AF 18-250 DiII

Settings:
18mm f3.5 1/125s

Factors:
Camera Orientation (Hrz / Vert)
Battery (almost emptied SONY NiMh 2500 mA 1.2V / full charged SANYO eneloop NiMh 2000 mA 1.2V)
SR mode (On / Off)

Test 1
almost emptied SONY 2500 mA
Horizontal
SR On
19 shoots
68% good
32% normal (tiny shadows)
Good Sample (100% crop)
Normal Sample (100% crop)

Test 2
Full charged SANYO eneloop 2000 mA
Horizontal
SR On
28 shoots
18% good
64% normal
11% poor
7% very poor
Good Sample (100% crop)
Normal Sample (100% crop)
Poor Sample (100% crop)
Very Poor Sample (100% crop)

Test 3
Full charged SANYO eneloop 2000 mA
Vertical
SR On
20 shoots
100% normal
Normal Sample (100% crop)

Test 4
Full charged SANYO eneloop 2000 mA
Horizontal
SR Off
54 shoots
66% normal
33% normal-poor
Normal Sample (100% crop)
Normal-Poor Sample (100% crop)

Seems that SR system make the results worse, but my thought is that pictures taken with the SONY batteries are much better than with the SANYO ones.
12-06-2010, 04:36 PM   #81
New Member




Join Date: Dec 2010
Location: Just outside Prague
Posts: 1
I have encountered the problem you described, but it was always my fault, not the camera's.
12-06-2010, 05:26 PM   #82
Senior Member




Join Date: Sep 2010
Posts: 149
hey guys i must admit you scared just scared me.. how to test, I mean with or without flash, does it matter? tyvm. with flash everything seems to be fine.
12-07-2010, 05:56 AM   #83
New Member




Join Date: Apr 2010
Location: Pequannock
Posts: 16
QuoteOriginally posted by SMeK Quote
hey guys i must admit you scared just scared me.. how to test, I mean with or without flash, does it matter? tyvm. with flash everything seems to be fine.
I'd say don't bother if you did not notice issue yet. My second sample has some of it but I can totally live with that much blur.

12-07-2010, 06:17 AM   #84
Veteran Member
alohadave's Avatar

Join Date: Jan 2008
Location: Quincy, MA
Photos: Gallery | Albums
Posts: 2,024
QuoteOriginally posted by Jesus Quote
Not to high jack this thread , but , I was in a electronics store in Phoenix last weekend , got to handle several cameras including the K-X and "wow" , the volume of sound from the mirror slap shocked me and the weight too , compared to the others .

Pay no attention to this post .
You should hear the K100D Super. It's like a gunshot.
12-07-2010, 05:46 PM   #85
Junior Member




Join Date: Aug 2009
Posts: 29
I have had a lot of trouble with blurred/doubled images on my K-m and have also noticed it on my K-x.

A couple of months ago, I finally decided to send in the K-m to pentax to see if they could fix it. The double images were not the only problem with the camera, the viewfinder was also quite foggy. I got the K-m back in under a month from Pentax Canada. The doubled images are still there, but to a lesser extent. Pentax did not tell me what they did to the camera, but I do know they replaced the viewfinder, since the scratch that was on the back of the viewfinder is gone.
I bought the K-x just after sending in my K-m, hoping it would not have a problem with doubled images. I have still noticed double images at 1/60 to 1/125 of a second. I find I have much fewer double images when using the Tamron 17-50 then when using the kit lens. I think this is because to Tamron is much heavier and helps to steady the camera. I also have less double images when I remember to wait for the SR to show that its ready in the viewfinder. By using a heavier lens and waiting for SR to be ready, I have greatly reduced the pencentage of double images and no longer have to worry about my camera ruining my photographs.

I find the article on shutter induced blur on the Lumolabs site does a good job of explaining the double images that I have been experiencing.
The full explanation can be found here: http://www.falklumo.com/lumolabs/articles/k7shutter/index.html

Last edited by nick c; 12-07-2010 at 06:07 PM.
12-08-2010, 06:52 AM   #86
New Member




Join Date: Dec 2010
Location: Vigo
Posts: 2
QuoteOriginally posted by nick c Quote
I have had a lot of trouble with blurred/doubled images on my K-m and have also noticed it on my K-x.

A couple of months ago, I finally decided to send in the K-m to pentax to see if they could fix it. The double images were not the only problem with the camera, the viewfinder was also quite foggy. I got the K-m back in under a month from Pentax Canada. The doubled images are still there, but to a lesser extent. Pentax did not tell me what they did to the camera, but I do know they replaced the viewfinder, since the scratch that was on the back of the viewfinder is gone.
I bought the K-x just after sending in my K-m, hoping it would not have a problem with doubled images. I have still noticed double images at 1/60 to 1/125 of a second. I find I have much fewer double images when using the Tamron 17-50 then when using the kit lens. I think this is because to Tamron is much heavier and helps to steady the camera. I also have less double images when I remember to wait for the SR to show that its ready in the viewfinder. By using a heavier lens and waiting for SR to be ready, I have greatly reduced the pencentage of double images and no longer have to worry about my camera ruining my photographs.

I find the article on shutter induced blur on the Lumolabs site does a good job of explaining the double images that I have been experiencing.
The full explanation can be found here: LumoLabs -- Shutter-induced blur for Pentax K-7
Wow! amazing study.

Assuming that a massive tripod cannot be always used:

I guess K-x shutter should be similar as K-7. So there is some blur inherent to the heavier and faster shutter that cannot be avoided.

I'm not shure if the second (and seems to be the most important) factor: "unstable image sensor position controller or equivalent non-linear effect triggered by body acceleration" could be somehow improved (firmware update?)

My theory of the battery quality could be consistent with this second cause. Good batteries might reduce this effect in a certain extent?
12-30-2010, 01:13 AM   #87
Site Supporter
Site Supporter
Steve Beswick's Avatar

Join Date: Apr 2009
Location: Ontario, California
Photos: Gallery
Posts: 1,584
I know I am really late to the game on this issue, but has anyone considered that this might just be mashed shutter syndrome for most peoples issues? Is it possible the camera is light enough that instead of rotational blur from mashing the shutter the whole camera is moving? After viewing many test photos that show significant blur in the 1/100th range, that somehow magically clears up by 1/30th or so, this seems like the only logical conclusion to me.
12-31-2010, 12:08 AM   #88
New Member




Join Date: Apr 2010
Location: Pequannock
Posts: 16
QuoteOriginally posted by Steve Beswick Quote
I know I am really late to the game on this issue, but has anyone considered that this might just be m, ashed shutter syndrome for most peoples issues? Is it possible the camera is light enough that instead of rotational blur from mashing the shutter the whole camera is moving? After viewing many test photos that show significant blur in the 1/100th range, that somehow magically clears up by 1/30th or so, this seems like the only logical conclusion to me.

Not sure what mashed shutter is but on 1/30 issue does not disappear, it just that second edge on the picture is not so visible.
12-31-2010, 12:18 AM   #89
Site Supporter
Site Supporter
Steve Beswick's Avatar

Join Date: Apr 2009
Location: Ontario, California
Photos: Gallery
Posts: 1,584
QuoteOriginally posted by akpch Quote
Not sure what mashed shutter is but on 1/30 issue does not disappear, it just that second edge on the picture is not so visible.
Mashed shutter - the classic photographic mistake - pressing the shutter button entirely too hard. If the bluring is at it's worst in the 1/60th to 1/100th range that is usually the tell tale sign. The only thing that is throwing me off with this one is that M.S.S. usually presents as rotational blur, not lateral. Still, it is more likely to happen in vertical shots, so that would support my theory. Also, the lighter the camera, the more careful one must be to prevent M.S.S.
12-31-2010, 01:39 AM   #90
Inactive Account




Join Date: Feb 2010
Photos: Gallery
Posts: 488
I have serious problems with the shutter blur and the k-x. I would like to know the actual numbers where the problem starts and stops. And how big a blur in Mp there is.
I started another thread but i have yet to see the numbers. It is hard to blame it on the mashed shutter thing. If you hold down the button for a second or 5 and every pic is the same.
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!
and/or, camera, dslr, image, k-x, mirror, photography, sr, units
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Is the k-x mirror slap issue real? kyknos Pentax DSLR Discussion 31 10-29-2010 10:16 AM
Does the mirror slap rather hard on older bodies (K2, Spotmatic)? pasipasi Pentax Film SLR Discussion 4 05-26-2010 11:34 AM
I want K-x but mirror slap...:( kingtux Troubleshooting and Beginner Help 43 02-16-2010 01:25 PM
Does the K-x mirror slap not affect everyone? clipsed Pentax DSLR Discussion 15 02-10-2010 11:01 PM
6X7 mirror/shutter slap Gooshin Pentax Medium Format 21 01-15-2010 11:31 PM



All times are GMT -7. The time now is 07:21 AM. | See also: NikonForums.com, CanonForums.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