Does the K-x mirror slap not affect everyone?

clipsed · 02-08-2010, 07:31 AM

Hey guys, i just bought my pentax k-x and it's my first dSLR, i'm aware of everyones mirror slap problem and was wondering if its supposed to affect everyone. Here i took 4 photos at around 1/50, 1/60, 1/80 and 1/125 (or there abouts) the speeds that are supposed to be affected with SR on.

below are my results, am i a lucky one? also probly lost some quality on the photos due to reduced size.

Attached Images

Graystar · 02-08-2010, 09:12 AM

Originally posted by clipsed

also probly lost some quality on the photos due to reduced size.

not to mention that half-empty bottle of Wild Turkey!

I haven't had any problems handheld. I've had problems on my very lightweight Slik Sprint Pro 3-Way tripod when the center post is extended. The mirror mass seems to be enough to cause an oscillation. So now when I put the camera on there I set the center as low as possible. I'll sometimes still get a tiny amount of shake on an HDR image, when the camera fires three in a row. That’s what happens when the tripod only weighs as much as the camera.

Otherwise, I haven’t experienced any blurry images at speeds where they shouldn’t occur. I personally have speculated that if there’s a problem it’s likely due to the use of NiMH cells. The K-x does seem to prefer powerful batteries. The sensor is held in place by magnetic fields, and if the field strength drops then the sensor will move. But, of course, that’s just a speculation.

clipsed · 02-08-2010, 03:59 PM

Yeah mine seems to be working fine!

Shub · 02-08-2010, 04:18 PM

Yeah, same here. I tested mine today to make sure, absolutely no problems.

rawr · 02-08-2010, 05:24 PM

No problems with SR at any shutter speeds here.

Relax. Remember, not everything you read on the Internet is true.

drewx2 · 02-08-2010, 05:31 PM

What are all those random black specs on each pic?

clipsed · 02-08-2010, 05:41 PM

Oh yeah, only just noticed them. Hmm.. i looked through my other photos and i did not see them anywhere else, could have been a product of my graphics card as it died shortly after haha.

I can't seem to get a clear 300mm shot at 1/100. Always blurry, is that due to the slap or my shakey hands

clipsed · 02-08-2010, 05:59 PM

This is a picture i just took, 250mm zoom 1/100

GeneV · 02-08-2010, 08:32 PM

The noise bothered me at first, but I've seen no effect on the photos. I don't think the noise is a problem, either for anyone else in the room.

Wheatfield · 02-08-2010, 08:40 PM

Consider that "everyone's mirror slap problem" is probably one person who is able to set up a test to produce a result.

Andi Lo · 02-08-2010, 09:53 PM

Mine's all fine and dandy handheld. Haven't tried tripod yet. I use K10d for that kind of thing anyway.

GeneV · 02-09-2010, 05:44 AM

Originally posted by Andi Lo

Mine's all fine and dandy handheld. Haven't tried tripod yet. I use K10d for that kind of thing anyway.

Same here. My heavier K20d and K10d are more at home on legs.

shoebox · 02-09-2010, 07:46 AM

I haven't had this issue with my k-x (firmware 1.01.00.07).

SB

dude2009 · 02-10-2010, 06:37 PM

mine is working fine at least 95% of time. I occasionally got a blurred shot, but I suppose it's mostly focusing issue, really don't bother to check. Don't have that obsession for perfection on a 600 dollar product. It's been performing beyond my expectation anyway.

rhodopsin · 02-10-2010, 07:01 PM

Originally posted by clipsed

I can't seem to get a clear 300mm shot at 1/100. Always blurry, is that due to the slap or my shakey hands

Shutter speed is too slow. Rule of thumb is minimum speed 1/F where F is lens focal length. SR helps some, but not enough here for 1/100 sec.

02-08-2010, 07:31 AM	#1
clipsed Junior Member Join Date: Jan 2010 Posts: 32	Does the K-x mirror slap not affect everyone? Hey guys, i just bought my pentax k-x and it's my first dSLR, i'm aware of everyones mirror slap problem and was wondering if its supposed to affect everyone. Here i took 4 photos at around 1/50, 1/60, 1/80 and 1/125 (or there abouts) the speeds that are supposed to be affected with SR on. below are my results, am i a lucky one? also probly lost some quality on the photos due to reduced size. Attached Images

02-08-2010, 05:59 PM	#8
clipsed Junior Member Join Date: Jan 2010 Posts: 32 Original Poster	This is a picture i just took, 250mm zoom 1/100 Attached Images

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02-08-2010, 09:12 AM	#2
Graystar Inactive Account Join Date: Jan 2010 Location: Brooklyn, NY Posts: 144	Originally posted by clipsed also probly lost some quality on the photos due to reduced size. not to mention that half-empty bottle of Wild Turkey! I haven't had any problems handheld. I've had problems on my very lightweight Slik Sprint Pro 3-Way tripod when the center post is extended. The mirror mass seems to be enough to cause an oscillation. So now when I put the camera on there I set the center as low as possible. I'll sometimes still get a tiny amount of shake on an HDR image, when the camera fires three in a row. That’s what happens when the tripod only weighs as much as the camera. Otherwise, I haven’t experienced any blurry images at speeds where they shouldn’t occur. I personally have speculated that if there’s a problem it’s likely due to the use of NiMH cells. The K-x does seem to prefer powerful batteries. The sensor is held in place by magnetic fields, and if the field strength drops then the sensor will move. But, of course, that’s just a speculation.

02-08-2010, 03:59 PM	#3
clipsed Junior Member Join Date: Jan 2010 Posts: 32 Original Poster	Yeah mine seems to be working fine!

02-08-2010, 04:18 PM	#4
Shub Senior Member Join Date: Dec 2009 Location: Ontario Photos: Albums Posts: 163	Yeah, same here. I tested mine today to make sure, absolutely no problems.

02-08-2010, 05:24 PM	#5
rawr Veteran Member Join Date: Jun 2009 Posts: 11,913	No problems with SR at any shutter speeds here. Relax. Remember, not everything you read on the Internet is true.

02-08-2010, 05:31 PM	#6
drewx2 Forum Member Join Date: Jan 2010 Location: California Photos: Albums Posts: 53	What are all those random black specs on each pic?

02-08-2010, 05:41 PM	#7
clipsed Junior Member Join Date: Jan 2010 Posts: 32 Original Poster	Oh yeah, only just noticed them. Hmm.. i looked through my other photos and i did not see them anywhere else, could have been a product of my graphics card as it died shortly after haha. I can't seem to get a clear 300mm shot at 1/100. Always blurry, is that due to the slap or my shakey hands

02-08-2010, 08:32 PM	#9
GeneV Veteran Member Join Date: Oct 2008 Location: Albuquerque NM Photos: Albums Posts: 9,830	The noise bothered me at first, but I've seen no effect on the photos. I don't think the noise is a problem, either for anyone else in the room.

02-08-2010, 08:40 PM	#10
Wheatfield Moderator Join Date: Apr 2008 Location: The wheatfields of Canada Posts: 15,986	Consider that "everyone's mirror slap problem" is probably one person who is able to set up a test to produce a result.

02-08-2010, 09:53 PM	#11
Andi Lo Veteran Member Join Date: Jul 2008 Location: Halifax, Nova Scotia Posts: 2,924	Mine's all fine and dandy handheld. Haven't tried tripod yet. I use K10d for that kind of thing anyway.

02-09-2010, 05:44 AM	#12
GeneV Veteran Member Join Date: Oct 2008 Location: Albuquerque NM Photos: Albums Posts: 9,830	Originally posted by Andi Lo Mine's all fine and dandy handheld. Haven't tried tripod yet. I use K10d for that kind of thing anyway. Same here. My heavier K20d and K10d are more at home on legs.

02-09-2010, 07:46 AM	#13
shoebox Junior Member Join Date: Jan 2010 Photos: Gallery Posts: 38	I haven't had this issue with my k-x (firmware 1.01.00.07). SB

02-10-2010, 06:37 PM	#14
dude2009 Inactive Account Join Date: Dec 2009 Location: San Jose Posts: 24	mine is working fine at least 95% of time. I occasionally got a blurred shot, but I suppose it's mostly focusing issue, really don't bother to check. Don't have that obsession for perfection on a 600 dollar product. It's been performing beyond my expectation anyway.

02-10-2010, 07:01 PM	#15
rhodopsin Veteran Member Join Date: Dec 2009 Location: Deep Forest Posts: 643	Originally posted by clipsed I can't seem to get a clear 300mm shot at 1/100. Always blurry, is that due to the slap or my shakey hands Shutter speed is too slow. Rule of thumb is minimum speed 1/F where F is lens focal length. SR helps some, but not enough here for 1/100 sec.