Best Portrait Combo?

Started Aug 7, 2014 | Discussions thread
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69chevy Senior Member • Posts: 1,617
Re: Best Portrait Combo?

Ido S wrote:

Just another Canon shooter wrote:

I wonder how often you shoot at ISO 12800? At "moderate" ISO like 1600, etc., the A7S is about 1.5 stop better, which is even better than the theoretical 1.17 (= log_2(1.5^2)).

Well, it did somehow slip from my attention. Now that I look at a straight-on comparison, showing both graphs on the same page instead of flipping back and forth between tabs, I see that at sane high ISO settings the difference is indeed closer to 1.5 stops.

Now factor in that in order to get the same size print, the smaller format will need more "magnification". (By this, I mean that the smaller pixels must be enlarged to fill the same area.)

In a printed picture, it's easily two full stops.

If viewing on a monitor is your only method of displaying your photos, DXO numbers are relevant.

If you print large format, they mean nothing.

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