Fred Miranda comparison confirms DXO results. 5D III blown away.

Started Apr 26, 2012 | Discussions thread
stephenmelvin Veteran Member • Posts: 4,547
But that's not how it works

gipper51 wrote:

stephenmelvin wrote:

gipper51 wrote:

kelpdiver wrote:

not convinced about the decision to interpolate (and not describe how) the canon image to 36mp. That seems even less appropriate than downscaling the D800 down. Leaves you wondering how much of the difference is real versus the upscale.

Why would throwing information away from the bigger file to match the lower res camera be the better way?? By this method an 80mp medium format camera will only be 'marginally' more detailed than a 8mp 20D if you scaled it down.

You always scale the lower res camera up.

Nope, you scale the higher res camera down. It will still possess an advantage, since it starts with a lot more information.

That's how DXO does it for part of their test.

That may be their method, but that's just stupid IMHO for the real world...for the very reason I listed above.

But that's not how it works in the real world, when you print the image out. You do print, don't you?

So, for example, you want to print an 8x12 on a printer that's 300 ppi. That's about 8 megapixels. Guess what? The RIP throws the extra resolution away.

This is why the D800's resolution advantage doesn't show up until the prints get really big.

It's like telling your rich friend: "Hey buddy, but this limiter chip in your Ferrari so it only goes 65mph and my Buick will get us to New York just as fast!".

It's nothing like that.

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