The whole question of lens sharpness...

Started Jun 12, 2013 | Discussions thread
richardplondon
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Re: The whole question of lens sharpness...
In reply to gdourado, Jun 12, 2013

Being interested in having a lens with good peak sharpness, is not the same thing as being obsessed with having only sharp pictures.

Very often, one wants to control different degrees of sharpness or softness within a picture - through depth of field manipulation by using different subject distances and background distances, together with aperture control, also even with subject and/or camera movement.

That is a (uniquely photographic) "creative parameter" alongside all the other kinds of tone and colour, perspective, composition etc considerations.

And if a given lens is very restricted in its ability to show sharp vs soft contrast in the subject - because it is never capable of being truly sharp, no matter what you do, and/or, if its effective aperture range is not very broad - then certain kinds of pictorial "story" simply cannot be told.

It is worth expanding the concept of a "sharp" lens, BTW, in this respect: a lens needs to show not only a high resolution, and a broad aperture range, but also good control in terms of contrast / flare, to deliver these kinds of pictorial contrasts clearly to the viewer.

RP

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Panasonic Lumix DMC-LX1 Pentax K-5 Sigma 10-20mm F4-5.6 EX DC HSM Pentax smc DA 21mm F3.2 AL Limited Pentax smc DA 70mm F2.4 AL Limited +7 more
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