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11-23-2013, 02:37 PM   #31

Join Date: Jan 2009
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Posts: 9,674
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Well I have to look into that, but did a shoot today with the K-3 and all three lenses from f4 to f13 so there must be something in it. At my first glans that there are some amazing images in the bunch.

11-18-2014, 02:58 AM   #32
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Join Date: May 2014
Posts: 115
The teleconverter doubles your DoF by 2, does it although affect the difrraction?

as i mentioned it somwhere earlier, ive tried to compare k-3 to my k-x on macro photos, and there was really no big difference in terms of sharpness and detail resolution.
the smallest detail just grew in size twice, on my k-x it was 2-3px large and on the k-3 4-5px. ive tested it with different macro techniques, mostly with f5.6 and higher.

does it have smth. to do with the airy disc?
k-3 has a pixel pitch about 4m - that means on f2.8 with 3.7m till f1.2 with disc of 1.6m there should be more details visible than on the k-x 5.6m.
the only way to use such apertures is focus stacking, or would a doubler provide no aerial disk growth?

and the best resolution on my k-x will provide f4 with 5.3m good to know.) next test, reversed 50mm f1.4 on f4 with a doubler...) too bad there are not much insects around any more.

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