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-   -   2/3 Sensor Mult factor (https://www.dvinfo.net/forum/under-water-over-land/112646-2-3-sensor-mult-factor.html)

Mat Thompson January 18th, 2008 07:54 AM
2/3 Sensor Mult factor
 
Hi guys
Just a quick question someone may be able to clear up. With a 1/3 sensor the mult factor is 7.2 when using 35mm film lenses. So what is the mult factor when considering 2/3 chips? There mult be a formula I guess but I haven't been able to find anything?

Dale Guthormsen January 18th, 2008 08:14 AM
Mat,

what a great question.

sense it is twice as big would it cut it down to 3.6?

Or does it reduce 7.2 by a third which makes it 4.824?


Probably something totally different. Waiting to hear on this one too!!

Gordon Hoffman January 18th, 2008 10:04 AM
Mat
I believe you divide the 35mm diagonal measurement by the diagonal measurement of the ccd being used to get the crop factor.
eg 43.3(35mm)/11(2/3)= 3.9
eg 43.3(35)/6(1/3)= 7.2

Gordon Hoffman

Mat Thompson January 19th, 2008 06:59 AM
Cheers Gordon, thats interesting. Am I being a bit dull if I ask where the ccd numbers have come from?

Gordon Hoffman January 19th, 2008 05:43 PM
Mat not at all. This dicussion has a link to a site that seems to agree with what they came up with.
http://dvinfo.net/conf/showthread.php?t=13433

Gordon

Alkim Un February 14th, 2008 05:24 PM
Quote:
Originally Posted by Gordon Hoffman (Post 810376)
Mat
I believe you divide the 35mm diagonal measurement by the diagonal measurement of the ccd being used to get the crop factor.
eg 43.3(35mm)/11(2/3)= 3.9
eg 43.3(35)/6(1/3)= 7.2

Gordon Hoffman
then 1/2 inch cam gives 5.5 mult. factor with same calculation.

alkim.

Gordon Hoffman February 17th, 2008 08:25 AM
Hi Alkim. I believe it's around 5.4.

Gordon


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