[Leica] older 35 cron soft in corners?

[feli2 at earthlink.net (feli)]

I just had mine cleaned and adjusted by Leica, New Jersey (circa  
$80). I believe I am seeing
a little more snap wide open and they tightened up the focus and  
aperture movements considerably.
Mine was starting to feel a little rough around the edges. I believe  
the lubricants had dried up and dirt
had accumulated on the threads.

feli

On Jun 20, 2005, at 5:13 PM, Don Dory wrote:

> I also have a gen IV 35 Summicron.  I think that distortion is pretty
> small, however, vignetting to 2.8 is something close to two stops and
> the sharpness drops off pretty quickly in the corners until F4.
>
> Also, the lens is susceptible to poor results if the front group
> unscrews somewhat.  After twenty years the laquer? used to set the
> threads has come loose on many units and this movement can cause
> performance to suffer.
>
> Don

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