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Camera shake and lp/mm



 
 
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  #1  
Old August 11th 04, 12:15 PM
RolandRB
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Default Camera shake and lp/mm

Is there a formula for relating shutter speed, maybe focal length, and
reduction in resolution in lp/mm for typical camera shake?

I would be most grateful.

Thanks
  #2  
Old August 11th 04, 12:55 PM
Lassi Hippeläinen
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Default Camera shake and lp/mm

RolandRB wrote:

Is there a formula for relating shutter speed, maybe focal length, and
reduction in resolution in lp/mm for typical camera shake?

I would be most grateful.


I would be grateful for a formula for "typical camera shake". The rest I
can then work out myself...

-- Lassi
  #3  
Old August 11th 04, 02:31 PM
Vincent Becker
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Default Camera shake and lp/mm

RolandRB wrote:
Is there a formula for relating shutter speed, maybe focal length, and
reduction in resolution in lp/mm for typical camera shake?


The Pope is in France this weekend, I'll ask him. He is a world-renowned
shake expert.


--
Vincent Becker
Photographies et appareils anciens - Photography and classic cameras
URL:http://www.lumieresenboite.com
  #4  
Old August 11th 04, 02:31 PM
Vincent Becker
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Default Camera shake and lp/mm

RolandRB wrote:
Is there a formula for relating shutter speed, maybe focal length, and
reduction in resolution in lp/mm for typical camera shake?


The Pope is in France this weekend, I'll ask him. He is a world-renowned
shake expert.


--
Vincent Becker
Photographies et appareils anciens - Photography and classic cameras
URL:http://www.lumieresenboite.com
  #5  
Old August 11th 04, 02:56 PM
dadiOH
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Default Camera shake and lp/mm

RolandRB wrote:
Is there a formula for relating shutter speed, maybe focal length,
and reduction in resolution in lp/mm for typical camera shake?


Fuzzy is fuzzy.

--
dadiOH
_____________________________

dadiOH's dandies v3.0...
....a help file of info about MP3s, recording from
LP/cassette and tips & tricks on this and that.
Get it at http://mysite.verizon.net/xico
____________________________


  #6  
Old August 11th 04, 02:56 PM
dadiOH
external usenet poster
 
Posts: n/a
Default Camera shake and lp/mm

RolandRB wrote:
Is there a formula for relating shutter speed, maybe focal length,
and reduction in resolution in lp/mm for typical camera shake?


Fuzzy is fuzzy.

--
dadiOH
_____________________________

dadiOH's dandies v3.0...
....a help file of info about MP3s, recording from
LP/cassette and tips & tricks on this and that.
Get it at http://mysite.verizon.net/xico
____________________________


  #7  
Old August 11th 04, 03:51 PM
Hemi4268
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Posts: n/a
Default Camera shake and lp/mm

Is there a formula for relating shutter speed, maybe focal length, and
reduction in resolution in lp/mm for typical camera shake?


You can work this out by figuring the image motion in radians per second one
might get. Just use a laser pointer against a piece of color RC paper posted
on a wall in a dark room.

Process the paper and measure the movement. Do test for 1, 2 and 4 seconds.

Now all you need to do is use a number generator against the movement.

Final results will be in chance per 10 images.

So say at 100th of a second with a 100 mm lens you have 3 chances out of ten
for no motion. At 1000th of a second it's 10 out of ten. At a 10th it might
be 1 out of 10 meaning you must take 10 images to get one with little or no
motion.

Larry
  #8  
Old August 11th 04, 04:14 PM
Neil Gould
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Default Camera shake and lp/mm

Recently, Hemi4268 posted:

Is there a formula for relating shutter speed, maybe focal length,
and reduction in resolution in lp/mm for typical camera shake?


You can work this out by figuring the image motion in radians per
second one might get. Just use a laser pointer against a piece of
color RC paper posted on a wall in a dark room.

Process the paper and measure the movement. Do test for 1, 2 and 4
seconds.

Now all you need to do is use a number generator against the movement.

Final results will be in chance per 10 images.

So say at 100th of a second with a 100 mm lens you have 3 chances out
of ten for no motion. At 1000th of a second it's 10 out of ten. At
a 10th it might be 1 out of 10 meaning you must take 10 images to get
one with little or no motion.

I like it, even if it does seem overly optimistic!

Neil


  #9  
Old August 11th 04, 06:34 PM
Jeremy
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Posts: n/a
Default Camera shake and lp/mm

RolandRB wrote:

Is there a formula for relating shutter speed, maybe focal length, and
reduction in resolution in lp/mm for typical camera shake?



I recall reading Erwin Puts' take on this on his Leica website. He
attributed camera shake as THE single factor most likely to contribute to
blurring of the image. I believe that he wrote that it could be as much as
a 40% loss of sharpness, versus 2% for using a good filter, as a comparison.

I was really impressed by that statement--to the point that I began using a
tripod for virtually all of my shots--even those taken with my 2.3 MP
digicam. The improvement was astounding. I did not realize how much of an
effect a good tripod had on the image quality.

It makes little sense to invest in fine equipment and lenses, only to
compromise their ability to produce excellent images by failing to use a
rock-solid tripod, in my opinion. The tripod, and lenshood, have done more
to improve my lens' sharpness than anything else I could have done. And it
didn't require any formal lens testing to confirm that--the difference was
clearly visible just by looking at the prints.



  #10  
Old August 11th 04, 06:34 PM
Jeremy
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Posts: n/a
Default

RolandRB wrote:

Is there a formula for relating shutter speed, maybe focal length, and
reduction in resolution in lp/mm for typical camera shake?



I recall reading Erwin Puts' take on this on his Leica website. He
attributed camera shake as THE single factor most likely to contribute to
blurring of the image. I believe that he wrote that it could be as much as
a 40% loss of sharpness, versus 2% for using a good filter, as a comparison.

I was really impressed by that statement--to the point that I began using a
tripod for virtually all of my shots--even those taken with my 2.3 MP
digicam. The improvement was astounding. I did not realize how much of an
effect a good tripod had on the image quality.

It makes little sense to invest in fine equipment and lenses, only to
compromise their ability to produce excellent images by failing to use a
rock-solid tripod, in my opinion. The tripod, and lenshood, have done more
to improve my lens' sharpness than anything else I could have done. And it
didn't require any formal lens testing to confirm that--the difference was
clearly visible just by looking at the prints.



 




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