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Ex2F : when F1.8 just wont cut it

Started Jul 30, 2016 | Discussions thread
ttbek Veteran Member • Posts: 4,869
Re: Ex2F : when F1.8 just wont cut it

jacketpotato wrote:

norman shearer wrote:

tecnoworld wrote:

oh ok.

But in the first?

I'm not sure about the first post. The EX2F is 7.60 x 5.70mm vs APS-C which is 23.60 x 15.60mm. That's closer to 3 stops than 4. So F2.8 rather than F4 is the equivalent?

I'm not sure if equivalency is all about sensor size though? Doesn't sensor efficiency and megapixels also play a part?

Just a basic thing I tested when I had Ex1, I tested with Ex2F and my Apsc.

Semi Darkened room (toilet ):

Ex2F enables 1/125th ISO100 at F1.4 24mm, whereas my Apsc with lens F4 required ISO1600 for 1/125th (typical 16mm or 18mm lens usually starts at F3.5) .

Much more comfortable for me to carry Ex2F than a Giant £700 F1.4 16mm apsc lens

That doesn't follow from that at all. You're getting confused.

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