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01-30-2008, 05:15 AM   #1
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Help - K100d Can't shoot faster then 1/750

I just realized i can't shoot over 1/750, check the black area, what is this? the mirror not opening enough? :S
This where taken with a k100d+FA35

Full Sizes: Zenfolio | Pedro Barbosa | teste


1/500



1/750



1/1000



1/1500



1/2000


01-30-2008, 06:01 AM   #2
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I think it is a shutter problem.

Note the image will be inverted on the sensor, therefore if the mirror was not moving, the bottom of the frame would be black not the top.

It may be the trailing edge is sticking a little. Perhaps dirt perhaps something else.
How many frames have you shot
01-30-2008, 06:05 AM   #3
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QuoteOriginally posted by Lowell Goudge Quote
How many frames have you shot
Just one, it was not in burst mode.
One shot for each shutter speed, in Tv mode.
01-30-2008, 06:08 AM   #4
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QuoteOriginally posted by Pornflake Quote
Just one, it was not in burst mode.
One shot for each shutter speed, in Tv mode.
sorry, I meant in total on the camera?

Also can you run a program like ExposurePlot on your photo directory to see if there were other shots above 750. that way you will be able to determine possibly when this happened

01-30-2008, 06:16 AM   #5
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Aprox 5000 photos taken with it.

i've noticed this in the last summer when i bought my first m42 lenses, but i thought it was my lack of experience.

I really can't tell when this started, because i always shoot in Av :S


I'll google a bit, maybe i can find something.

All the help apreciated :S
01-30-2008, 06:23 AM   #6
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QuoteOriginally posted by Pornflake Quote

I really can't tell when this started, because i always shoot in Av :S
Regardless, the shutter speed will still be in the EXIF information; I believe this is what Lowell was referring to. Besides ExposurePlot, there's Exiftool and PhotoME, both of which will also reveal each shot's EXIF data.
01-30-2008, 06:27 AM   #7
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QuoteOriginally posted by Duck Dodgers Quote
Regardless, the shutter speed will still be in the EXIF information; I believe this is what Lowell was referring to. Besides ExposurePlot, there's Exiftool and PhotoME, both of which will also reveal each shot's EXIF data.
Yes i know what exif is.
I was trying to say is that i shoot in Av so i know +- the F stops i use.
If i shot mostly in Tv mode i would know +- the shutter speeds used.


Don't know if i make my self clear.
01-30-2008, 06:35 AM   #8
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QuoteOriginally posted by Duck Dodgers Quote
Regardless, the shutter speed will still be in the EXIF information; I believe this is what Lowell was referring to. Besides ExposurePlot, there's Exiftool and PhotoME, both of which will also reveal each shot's EXIF data.
Yes there are a lot of tools to read the exif data, but exposure plot is very good because it gives you a brakedown of how many shots you take at what shutter speeds. you jues select the root directory for your images and it does the rest.

01-30-2008, 06:40 AM   #9
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Thanks i will check that in the weekend when at home.
01-30-2008, 06:54 AM   #10
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Go send your camera in for service, looks like your shutter is failing.
01-30-2008, 06:55 PM   #11
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No more ideas?
01-30-2008, 07:58 PM   #12
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My idea is your shutter is failing.
01-31-2008, 06:15 AM   #13
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Try one more test shot at 1/4000. If even more of the frame is dark (compared to the 1/2000 shot), then yes, I'd say your shutter curtain is lagging.
01-31-2008, 06:24 AM   #14
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QuoteOriginally posted by Duck Dodgers Quote
Try one more test shot at 1/4000. If even more of the frame is dark (compared to the 1/2000 shot), then yes, I'd say your shutter curtain is lagging.
Yes, that's what's happens, it appears black twice as much then at 1/2000 :S

No home fix for this shutter lag?
01-31-2008, 06:36 AM   #15
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QuoteOriginally posted by Pornflake Quote
No home fix for this shutter lag?
Wow, I'd be afraid of mucking it up. My instinctive reaction would be to take it to local camera-repair shop, and see what they recommend. The fix might be as simple as some dry graphite lubricant (or whatever the recommended friction modifier is). Again, I would defer to their expertise.

The old Canon AE-1 series would develop the "Canon Squeal," which was mitigated by a couple of drops of very light machine oil at just the right spot on its shutter. This may be similar. Or it may be a bit of dirt in the mechanism.
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