Re: [Leica] Movement of Aperture Ring on Summicron-M 90 APO

[John Collier <jbcollier@powersurfr.com>]

It sounds to me that the lens is fine. The newer lenses I own have a
slightly looser feel to the aperture ring. It has never caused any problems
for me and I have never given it a moments thought.

John Collier

> From: "Mxsmanic" <mxsmanic@hotmail.com>
>
>SNIP
>
> I looked again last night, and the ring moves by about 0.35 mm--about the
> width
> of the tiny white lines with which the figures on the ring are engraved).
> That
> works out to just 1/26 of a stop (there is a bit over 9 mm between stops).
> The
> blades _seem_ to move, but I'm not sure (it's hard to recognize 1/26 of a
> stop!).  Obviously, this cannot possibly have an effect on my photos, so my
> only
> real concern is that it might get worse, I guess.
>
>SNIP
> 
> For what it is worth, this lens shows me detail that I didn't think I could
> get
> in scans.  My scanner can do 53 lp/mm at best, and this lens appears to easily
> beat that.  Now, that in itself is no surprise, especially for a Leica lens;
> but
> what surprises me is that I am getting this on shots that I took _handheld_,
> and
> it _is_ a 90-mm lens.  So I'm really surprised (and happy) that I'm getting
> such
> amazing sharpness even with handheld shots (maybe my hands are steadier than I
> thought, or something).