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02-08-2010, 07:31 AM   #1
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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.

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02-08-2010, 09:12 AM   #2
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QuoteOriginally posted by clipsed Quote
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. Thatís what happens when the tripod only weighs as much as the camera.

Otherwise, I havenít experienced any blurry images at speeds where they shouldnít occur. I personally have speculated that if thereís a problem itís 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, thatís just a speculation.
02-08-2010, 03:59 PM   #3
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Yeah mine seems to be working fine!
02-08-2010, 04:18 PM   #4
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Yeah, same here. I tested mine today to make sure, absolutely no problems.

02-08-2010, 05:24 PM   #5
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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
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What are all those random black specs on each pic?
02-08-2010, 05:41 PM   #7
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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, 05:59 PM   #8
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This is a picture i just took, 250mm zoom 1/100

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02-08-2010, 08:32 PM   #9
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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
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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
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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
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QuoteOriginally posted by Andi Lo Quote
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
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I haven't had this issue with my k-x (firmware 1.01.00.07).

SB
02-10-2010, 06:37 PM   #14
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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
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QuoteOriginally posted by clipsed Quote
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.
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