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Opticallimits > Forums > Just Talk > Focal Length equivalence: DX to FF

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Focal Length equivalence: DX to FF
Brightcolours Offline
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#10
05-19-2011, 03:56 AM
[quote name='Lomskij' timestamp='1305768011' post='8572']

Oops, forgot the square dependence. However after recalculation I still get that Canon is ~1.3 stop and Nikon is ~1.15 stop. Mind sharing how do you get that 1 1/3 stop figure?

[/quote]

f2.8 to f2 is one stop... f2 to f 1.8 is 1/3rd stop.

For Canon, its f1.8 -> f2.88, a bit over 1 1/3rd.

For Nikon its f1.8 -> f2.7, a bit under 1 1/3rd. Actually... f2.726 for for instance a D300 (1.52x crop), f2.808 for a D3100.
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Messages In This Thread
Focal Length equivalence: DX to FF - by IanCD - 05-18-2011, 09:54 PM
Focal Length equivalence: DX to FF - by mst - 05-18-2011, 10:15 PM
Focal Length equivalence: DX to FF - by IanCD - 05-18-2011, 10:19 PM
Focal Length equivalence: DX to FF - by mst - 05-18-2011, 10:50 PM
Focal Length equivalence: DX to FF - by Guest - 05-18-2011, 11:26 PM
Focal Length equivalence: DX to FF - by Guest - 05-19-2011, 01:20 AM
Focal Length equivalence: DX to FF - by Brightcolours - 05-19-2011, 03:56 AM
Focal Length equivalence: DX to FF - by Guest - 05-19-2011, 07:26 AM
Focal Length equivalence: DX to FF - by Guest - 05-19-2011, 08:01 AM

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