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Post by belgiumreporter on Jun 10, 2015 7:03:15 GMT -5
Why compare The nikon D3 and pentax Q ? well just because i can and because i wanted to know to wich extend a Q could compare to a D3 ( 5.5 crop sensor against full frame) The Q is hailed as a fine camera and the 5.5 crop Q is better than anything else in it's leage ( think of nikon 1) Once again my test is far from scientific, but shows a real life situation and not a resolution graph. To make things a bit more interesting i've used the nikon 1:1,2 50mm on both cameras. The results so far show that there's no point in using a full frame lens on the Q exept if you want to take advantage of the 5,5x multiplication factor of the Q, but this comes with a (heavy) price. Wide open any fx lens i've tested on the Q is useless, things improve if you stop down. I'll be showing you this in another thread. As far as this test goes, here's the results of a nikkor 50mm 1:1.2 wide open on both cameras. You'll notice the diffrence in perspective as the 50mm behaves as a 220mm on the Q. First the full picture secondly the crop at 100%. You'll also notice the 50 1:1,2 isn't much of a performer wide open even on the D3. Things improve dramaticly if you stop down to 2.8 but then the discussion can start why to buy a 1:1.2 in the first place...
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Deleted
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Post by Deleted on Jun 10, 2015 19:47:20 GMT -5
The Nikkor 1:1.2 probably isn't the best test lens as it is known more for being fast than being sharp. Try a micro nikkor or even the 50mm f/2 Nikkor (one of my all time favorites (easily outperforms the f/1.4 Nikkor and is smaller and lighter.).
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Post by belgiumreporter on Jun 11, 2015 8:59:22 GMT -5
here's some more results of the 50 1:1,2 on the pentax Q : Wide open quality is horrible, but starts to improve at f2 gets good at f2.8 still some CA better at f4 sharpness about the same as f4 but at f5.6 CA is better at f8 diffraction kicks in and the image becomes unsharp (though due to increased DOF it may seem the image is still sharp but wrongly focussed) CA and diffraction are almost non existing on the D3 so unless i am very mistaking the small sensor size of the Q coupled with FX lenses introduces these aberations. (image quality when using original Q lenses is better)
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