A7r 24-70 at 70mm vs EM1 12-40 at 40mm (80mm EFL)

Started Mar 6, 2014 | Discussions thread
npires Senior Member • Posts: 1,733
Re: Some crops with Olympus resized to 36 MP

LTZ470 wrote:

Talk is cheap and so is up sizing 16Mp vs 36Mp...lol...

Lets be honest and just use 100% Crops folks of both photos...that would be fair would it not?

No it's not. Because you're not comparing images at a 1:1 ratio between the two sets. You either down sample the larger image to the same size as the smaller image or you up scale the smaller image to the larger size and then compare.

It's better to resize the smaller image because if you downsize the larger image depending on the method used for the resize you can introduce artifacts/eg moire where as for an upscale this is less likely to happen.

The way the original crops are shown in the OP give a skewed bias towards the smaller sensor. IMO they also look over sharpened.

I also own neither camera so am not being biased to one or other other. Simply I work with graphics for a living and this is how we do our job!

 npires's gear list:npires's gear list
Sony RX100 III Sony Alpha NEX-5 Sony a7 II Sony FE 55mm F1.8 Sony FE 70-200 F4 +3 more
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