Olympus 17mm f1.2 vs Fujifilm x100v f2

Started 3 months ago | Questions thread
northlondon43
OP northlondon43 Senior Member • Posts: 1,810
Re: Olympus 17mm f1.2 vs Fujifilm x100v f2

WT21 wrote:

northlondon43 wrote:

Samuel Dilworth wrote:

The Fujifilm has a 23.5 × 15.6 mm sensor, so the sensor area is 366.6 mm^2.

Micro Four Thirds cameras typically have a sensor area around 17.3 × 13.0 mm for an area of 224.9 mm^2. That makes the Fujifilm sensor 1.63 bigger. It therefore collects 1.63 times more light at a given f-number.

However, the f-numbers are different here (f/1.2 versus f/2). The Olympus image is (2 ÷ 1.2)^2 = 2.78 times brighter than the Fujifilm image, and 2.78 ÷ 1.63 = 1.70. So in the end the Olympus collects 1.70 more light. That’s about two-thirds of a stop faster without all of this needless precision.

This ignores vignetting differences and sensor efficiency differences that might sometimes matter, but you get the idea.

Many thanks

Because you have your answer here, why do you keep looking at other answers? If you only need amount of light, it’s answered above by mr dilworth. Done

Because I'm open to other explanations. As I thought I'd explained I'm not technically minded so someone might offer another way of putting it.

Don't be so flaming rude mate.

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Adrian
An amateur, atheist, alliterationist

 northlondon43's gear list:northlondon43's gear list
Fujifilm X100V Panasonic Lumix DC-G9 Panasonic Lumix G 25mm F1.7 ASPH Panasonic Leica 12-60mm F2.8-4.0 ASPH Olympus 17mm F1.2 Pro +4 more
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