Re: Various Lens Tests (may be long)

[Joseph Tainter]

The only question I have is, can you tell us there was no focus error 
for the tests you conducted? Did you rely on AF, MF, or MF with 
magnifier? Just curious. If DA14 didn't perform that well, I wonder how 
it compared to K/A15/3.5.

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Alan, I used autofocus, except for the Zenitar, of course. Since these 
are all wide angles, even at f2.8 dof should take care of any autofocus 
variation. Lens differences that I observed at f2.8 tended to be 
confirmed at smaller apertures, where dof increases. So I don't think 
focusing had anything to do with the results. I did think about this 
beforehand. The shots were from 1.5 to 2.0 m. from the wall. F/Calc 
tells me that at this distance and f2.8, 16 mm. focal length, dof is 
over one meter.

Others have reported that the DA 16-45 at 16 mm. outperforms the DA 14.
I have used the DA 14 only a couple of times for images from which I 
made enlargements (on A4/8-1/2 x 11 inches). The results seemed just 
fine. The differences I saw at actual pixels may not have much 
correspondence to real world shooting.

Joe