black-out

English translation: time when the camera mirror blocks the viewfinder

GLOSSARY ENTRY (DERIVED FROM QUESTION BELOW)
English term or phrase:(mirror) black-out
Selected answer:time when the camera mirror blocks the viewfinder
Entered by: Hakki Ucar

12:02 Aug 31, 2007
English language (monolingual) [PRO]
Tech/Engineering - Photography/Imaging (& Graphic Arts)
English term or phrase: black-out
A photograph camera's Key Features:
-Super fast operation (power-up 13 ms, shutter lag 45 ms, black-out 100 ms)

I know power-up means and shutter lag means, but what does black-out mean?
Thanks
Hakki Ucar
Türkiye
Local time: 19:33
time when the camera mirror blocks the viewfinder
Explanation:
In an SLR camera, when the shutter is released, the mirror flips up to let the light through to the matrix. When the mirror is up, the photographer cannot see anything through the viewfinder.
This matters for shutter speeds of less than 100 ms (in your case) because at longer shutter speeds the mirror will be up for a longer time.

HTH

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Note added at 17 mins (2007-08-31 12:19:35 GMT)
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You can read about it e.g. here: http://www.usa.canon.com/consumer/controller?act=ModelInfoAc...

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Note added at 1 hr (2007-08-31 13:40:57 GMT)
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Blackout on a digital camera: http://www.dpreview.com/news/0511/05110104nikond200.asp#feat...

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Note added at 1 hr (2007-08-31 13:49:17 GMT)
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OK, I concede - blackout also exists in "DSLR-like" cameras with electronic viewfinders (and no mirror).
P.
Selected response from:

PAS
Local time: 17:33
Grading comment
Thank you.
4 KudoZ points were awarded for this answer



SUMMARY OF ALL EXPLANATIONS PROVIDED
4 -1time when the camera mirror blocks the viewfinder
PAS


Discussion entries: 5





  

Answers


14 mins   confidence: Answerer confidence 4/5Answerer confidence 4/5 peer agreement (net): -1
time when the camera mirror blocks the viewfinder


Explanation:
In an SLR camera, when the shutter is released, the mirror flips up to let the light through to the matrix. When the mirror is up, the photographer cannot see anything through the viewfinder.
This matters for shutter speeds of less than 100 ms (in your case) because at longer shutter speeds the mirror will be up for a longer time.

HTH

--------------------------------------------------
Note added at 17 mins (2007-08-31 12:19:35 GMT)
--------------------------------------------------

You can read about it e.g. here: http://www.usa.canon.com/consumer/controller?act=ModelInfoAc...

--------------------------------------------------
Note added at 1 hr (2007-08-31 13:40:57 GMT)
--------------------------------------------------

Blackout on a digital camera: http://www.dpreview.com/news/0511/05110104nikond200.asp#feat...

--------------------------------------------------
Note added at 1 hr (2007-08-31 13:49:17 GMT)
--------------------------------------------------

OK, I concede - blackout also exists in "DSLR-like" cameras with electronic viewfinders (and no mirror).
P.

PAS
Local time: 17:33
PRO pts in category: 4
Grading comment
Thank you.

Peer comments on this answer (and responses from the answerer)
disagree  John Alphonse (X): With a mirrored "SLR" the blackout time equals the shutter speed. Here, being digital, the 100 milliseconds refers to processing time of one image before the camera is ready to shoot the next. Milliseconds aren't used to measure shutter speed.
2 hrs
  -> not necessarily - a mirror is always up longer than very short shutter speeds (see the D200). I do concede that this does not only apply to SLR cameras; also, if you have filled the buffer, the blackout is long gone and the camera still isn't ready...
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