mtop6867
newbie
Reged: 07/07/2008
Posts: 5
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In ap answers, Amateur Photographer dated 27 September, it is explained that a CCD described as 1/1.7in is actually 7.6x5.7mm. Unfortunately, it is not explained how that size is calculated.
In the manual for my Fujifilm Finepix S5700, the specs state that the CCD is 1/2.5in. Can someone tell me what the dimensions of the CCD actually are? And can someone please explain the formula for finding the CCD size from the quoted size of 1/2.5in?
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"Most people are fools, most authority is malignant, God does not exist, and everything is wrong." -Ted Nelson
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Meredith
enthusiast
Reged: 23/10/2006
Posts: 290
Loc: Coventry, UK
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Linky explains all.
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Meredith Lewis
http://www.meredithlewis.co.uk
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Terrywoodenpic
A whiff of silicon...
Reged: 21/01/2006
Posts: 367
Loc: Saddleworth UK
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It is all done to confuse... Only a mad man would use old vacuum tube standards for modern digital sensors.
Although the physical size of a sensor is important in terms of quality,and in regard to the crop factor. Generally these are hidden from us in advertising literature.
In their place we are given only the number of Pixels... as if magically they equate to a quality standard regardless of sensor size and pixel size and spacing. 
If we get any indication at all it is in the arcane vacuum tube sizes.
Perhaps it is time we users campaigned for sensors to be expressed in their real mm size. 
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63 happy photo years from amateur to professional and back to amateur
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beejaybee
Marvin
Reged: 18/07/2007
Posts: 4967
Loc: Really Here In Name Only
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Quote:
Perhaps it is time we users campaigned for sensors to be expressed in their real mm size.
But what's really important is the size of the individual pixel ...
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mike_j
nobbut a beginner
Reged: 23/08/2005
Posts: 1350
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Quote:
Quote:
Perhaps it is time we users campaigned for sensors to be expressed in their real mm size.
But what's really important is the size of the individual pixel ...
I don't know where you would find this exact information. dpreview lists pixel density but doesn't take active photosensor area efficiency into account.
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