wlaidlaw Posted June 7, 2015 Share #281 Posted June 7, 2015 Advertisement (gone after registration) Wilson, the best would be to take a picture at f/4 with the focus at f/2 and another with the focus at f/4. I'm quite sure of this behavior because Lloyd Chamber got the same thing on his copy. The shift is minor though so unless you have a side-by-side comparison, you might not notice it. I did pretty much this as far as you can with the EVF, by focusing at very carefully f4 and setting focusing point on a diagonal rough stone wall pretty much so that the peaking fields are split 50/50 behind and in front of selected point and then opening up to f2 to see if the narrower and less distinct peaking fields are still split 50/50, which they were. If I have time tomorrow I will get out the Nikon charts and run some proper tests to determine how much aperture shift there is. Apart from a CV Nokton 35/1.2 , I seem to have been very lucky on lenses aperture shifting. My 35/1.4 ASPH, a lens notorious for aperture shift, hardly displays any and it is well within the DOF/COC, so in effect, able to be ignored. Given my bad luck recently on new Leica lenses being out of adjustment, I am due some luck to balance things out. Wilson Quote Link to post Share on other sites More sharing options...
Advertisement Posted June 7, 2015 Posted June 7, 2015 Hi wlaidlaw, Take a look here Summilux 28 now out!. I'm sure you'll find what you were looking for!
viramati Posted June 7, 2015 Share #282 Posted June 7, 2015 My summicron 28 certainly doesn't focus shift as it is stopped down, in fact I find it to be my easiest lens to focus accurately on the M 1 Quote Link to post Share on other sites More sharing options...
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