Do we still need a TC?

Started Nov 11, 2013 | Discussions thread
paulkienitz Veteran Member • Posts: 5,297
Re: Basic error

MightyMike wrote:

I'd suggest that many lenses still out resolve even high pixel count sensors by a good margin.

This is getting harder to believe.  Today's crop-format sensors have a photosite spacing between 3.5 and 4 microns.  I don't think there are a ton of lenses out there that can resolve finer than that.  For one thing, the diffraction blur circle at f4 is already over 5 microns in theory, and f2.8 lenses are not usually sharper than f4 ones.  In practice it seems possible to extract smaller detail than this, but it's an uphill fight.

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