On Fri, Jul 10, 2009 at 8:47 PM, Chuck
Norcutt<chucknorcutt@xxxxxxxxxxxxxxxx> wrote:
> Not so long ago Olympus was talking about a planned 12 MP maximum for
> the 4/3 sensor. If you read the test of the DZ 50/2 you can see exactly
> where the 12 MP maximum comes from. At f/4.5 the lens is resolving 1500
> line pairs vertically toward the outside and about 1600 dead center.
> Come off f/4.5 though and resolution starts to drop. A 4/3 sensor that
> can resolve 1500 line pairs vertically has pixel dimensions of 3000 x
> 4000 or... 12 MP.
>
> Since the DZ 50/2 must be one of the better lenses, if it can't go
> beyond 12 MP it doesn't make much sense to go to even smaller pixels.
> The same is true in the Canyon camp. I suspect that there are precious
> few lenses that can resolve the 15 MP of the 50D sensor and the same
> holds for the 21 MP sensor of the 5D Mk II (although the 50/1.4 can do
> it across the full sensor at f/5.6-f/8 but not above or below that).
>
> So, the sensors are now outresolving the lenses and even the best
> lenses. I guess we don't need any more pixels... but that won't prevent
> the manufacturers from giving us more. :-)
I will share this with a relative who bought a 5DmkII when they first
came out. He shoots at the half resolution setting, mainly because he
didn't want to double his file storage instantly and didn't think he
needed it for his purposes. It sounds like he really doesn't need it.
Joel W.
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