Glossary entry (derived from question below)
English term or phrase:
(mirror) black-out
English answer:
time when the camera mirror blocks the viewfinder
Added to glossary by
Hakki Ucar
Aug 31, 2007 12:02
16 yrs ago
10 viewers *
English term
Türkiye
20 years in IT translation!
Native in: Turkish (Variant: Standard-İstanbul ) 
Works in: English, Turkish to English, English to Turkish
black-out
English
Tech/Engineering
Photography/Imaging (& Graphic Arts)
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
-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
Responses
| 4 -1 | time when the camera mirror blocks the viewfinder |
PAS
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Change log
Sep 1, 2007 12:25: Hakki Ucar changed "Edited KOG entry" from "<a href="/profile/615862">Hakki Ucar's</a> old entry - "black-out"" to ""time when the camera mirror blocks the viewfinder""
Sep 1, 2007 12:28: Hakki Ucar changed "Edited KOG entry" from "<a href="/profile/615862">Hakki Ucar's</a> old entry - "mirror black-out"" to ""time when the camera mirror blocks the viewfinder""
Responses
-1
14 mins
Selected
time when the camera mirror blocks the viewfinder
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.
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)
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OK, I concede - blackout also exists in "DSLR-like" cameras with electronic viewfinders (and no mirror).
P.
Peer comment(s):
| 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
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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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4 KudoZ points awarded for this answer.
Comment: "Thank you. "
Discussion
http://photonotes.org/cgi-bin/entry.pl?id=Mirrorblackout