Re: EOS 20/2.8 vs 20-35/3.5-4.5

[Vesa Perala]

>direct comparison, f/2.8 vs f/3.5 is "a little" unfair. It's a 2/3 stop
>difference.

I believe in Canon-terminology 3.5 is half a stop slower than 2.8.
Just like 4 - 4.5 - 5.6.

If it really matters.

Vesa

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