The blur index of 50/2 is actually increasing from F4 that means resolution
is reducing. You better look at dpreview for easier understanding of the
actual performance, its resolution is reduced to half at F16 that means
could only resolve ~4MP.
http://www.dpreview.com/lensreviews/olympus_50_2_o20/page3.asp
C.H.Ling
----- Original Message -----
From: "David Irisarri"
Hi Chuck,
I am not an engineer and I don´t really understand this complex
technical data so I apologize if I am reporting something wrong but I
remember reading this in slrgear about E-510 and Zuiko Digital 50 f2.
Sharpness
Looking at the blur graph, the lens is incredibly sharp: it barely
surpasses one blur unit at ƒ/2, and by ƒ/4 it produces images as sharp
as our scale can detect. This sharpness trend continues all the way to
ƒ/16, where diffraction limiting starts to set in. By ƒ/22, the lens
still produces fantastic results, registering just over 2 on our blur
scale. Some lens owners would be content to see the kind of performance
you see at ƒ/22 at more commonly used apertures such as ƒ/8. Overall,
absolutely superb performance.
Do you think E-3 is diffraction limited?
http://www.slrgear.com/reviews/showproduct.php/product/35/cat/all
Warmest regards,
David
Chuck Norcutt escribió:
> Nothing to do with color but aperture is certainly a consideration with
> pixel density of the E3. Diffraction will begin to limit E1 resolution
> at apertures smaller than f/8. An E3 will be diffraction limited at
> apertures smaller than about f/5.6. It's not that you can't shoot the
> E3 at f/8 but if you do the resolution limits will be closer to the E1.
>
> There should be nothing you can set in the camera that will affect raw
> development unless you're accepting the conversion using the parameters
> that would have been used if the camera had made a JPEG. If I were home
> I'd say send me one and let me convert it for you to see what I could do
> in ACR. But the only computer I've got at the moment is the "Krappy
> Kolor" laptop.
>
> Now that I'm thinking about it I'm wondering if diffraction can in fact
> have an effect on color. Diffracted beams don't go where they're
> intended. Check color for shots of f/5.6 or wider vs. f/8 or smaller.
>
> Chuck Norcutt
>
>
> Ian W wrote:
>
>> Last night I was looking through my pictures with my wife (using
>> irfanview) and we came to the conclusion that they were better colour,
>> sharpness and in some other unexplained way than ones taken with the
>> E-3, not much but enough to notice has anyone else found this.
>>
>> maybe its to do with aperture and its raw development or maybe it's some
>> in camera setting I have wrongly set.
>>
>> has anyone else found this?
--
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