Re: [OM] is this distortion? what kind?

[Winsor Crosby]

> Acer, I've clipped and rotated the pertinent parts of the steps you're
> talking about and there's distortion in both of the steps, about 1/2 0n my
> estimation. This is quite normal for any lens. Your monitor probably distorts
> more thant the lens does. See below:
>
> http://members.aol.com/wkato/images/28-35.jpg
>
> >  > i was looking at some old pix, and came across this one with the
> >   > 28/3.5. note lower step, it seems to be concave down (sorry no idea what
> >   > to call it) while the upper step is level all the way across. is this WA
> >   > distortion at the edge? what is is called? thanks,
> >   >
> >   >
> http://albums.photopoint.com/j/View?u=380427&a=9125406&p=31108137&Sequence=0
>  >  &res=high

Interesting that there would be pincushion distortion when barrel 
distortion is usually what you get in wide angle lenses.  Gary 
Reese's test of this lens also revealed barrel distortion. I think 
something else is at work here.
Winsor
--
Winsor Crosby
Long Beach, California, USA
mailto:wincros@xxxxxxxxxxx



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