[Leica] 90 AA - focus shift?

[hopsternew at gmail.com (Geoff Hopkinson)]

Let's see samples everyone!

Cheers
Geoff
http://www.pbase.com/hoppyman
NO ARCHIVE

On 8 November 2010 09:24, John Collier <jbcollier at shaw.ca> wrote:

> I can't comment on the digital/focus shift issue but my 90/2AA was tack
> sharp though out the focus range. Wide open it was slightly softer in the
> corners up close but only slightly and light years ahead of any other 80 to
> 110 lens.
>
> John
>
> On 2010-11-07, at 1:20 PM, Tim Gray wrote:
>
> > I've heard the 90 AA is a wonderful lens. I've also heard that it is
> horrible below 3 m OR it loses a bit of performance in that range.  
> Probably
> closer to the latter, but I'd like to hear opinions on that if you have 
> any.
>  How good/bad is it closer in?
> >
> > Which brings me to my 2nd question. I've read that the decrease in
> performance close in on this lens is due to focus shift. True? Does that
> mean there is a plane of bitingly sharp detail, but just not where you want
> it to be?
>
>
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