The whole question of lens sharpness...

Started Jun 12, 2013 | Discussions thread
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Re: Sharpness not too important on 2.4MP monitor ...
In reply to PK24X36NOW, Jun 13, 2013

PK24X36NOW wrote:

BertIverson wrote:

gdourado wrote:

... Do we really need more and more sharpness? For portraits, events, models... is super sharpness even a good thing? How much is enough? ...

My take on this is simple. If one can fill the frame (avoiding cropping), lens sharpness is usually irrelevant when viewing on a 2.4MP monitor. Viewing a 16MP shot on a 2.4MP monitor means about 4-6 sensor pixels are rendered into 1 pixel on the monitor. In the case of a zoom lens, it only needs to be real sharp at the extreme long end. At lesser FL one will fill the frame (see above).

my 0.02 -- PS pixel peeping not allowed

Bert

When viewing the whole image, then the effect is probably not going to be seen in a big way on screen, as you indicated, but, alas, "pixel peeping" is how critical image sharpness can be seen in a way that could only be replicated in film days with a microscope (looking at a slide or negative, not a print, which would not display all of the original's information), and that is where image sharpness differences can be seen on a computer screen. Viewing "actual pixels" on screen is the (size) equivalent of massive print sizes that are seldom, if ever, going to be made by most people. The contrast ratios available in print are also far more limited than viewing on screen.

Just to be clear, it is a mistake to think that just because most people will not be making large prints that their small prints will not benefit from a sharper and therefore high resolution (no, not MP) image. When I used to shoot medium format film i could easily see the difference in even small prints over 35mm film. Then you also have to consider the advantages of being able to crop a more sharper and therefore higher resolution image.

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