[Leica] Possible lens adjustments

[john at mcmaster.co.nz (John McMaster)]

I know the guys at Lacklands in Auckland (NZ distributors), pleasant but not 
"all knowing". I sent the info of these tests off to them today but heard 
nothing back as yet.... 

I sent my M9 (dropped it last year, rangefinder calibration out) and all 
lenses to Solms in Jan, several of them for 6-bitting and all for setting up 
with my M9, got them back about a month ago. I tested them at infinity 
(Noctilux had been unable to focus that far before!) and all were good.

The used prices for the 75mm are close to what I would pay for a new one 
(dealer discount, reclaim GST) so holding off for that thanks ;-) There was 
one being sold in Auckland a couple of weeks back (4000NZD) 
but I turned it down. The Aus one is 3300AUD, so 4160NZD. Add the 15% GST 
here and it goes to 4830NZD and I ordered mine when it was 4700NZD inc GST 
(reclaimable)!

john
________________________________________


You had the lens adjusted already at Solms?????
I would certainly contact them then and explain exactly what you have
happening. You know the guy to talk with for ANZ customers?
Get me off list if I didn't already pass that to you.
I would expect that wide open it should be spot on (for sure within DoF) in
close if camera and everything else is correct.
PS there's an APO Summicron 75 on eBay here currently. I'm just sayin'

Cheers,
Geoff
http://www.pbase.com/hoppyman



On 16 April 2012 08:37, John McMaster <john at mcmaster.co.nz> wrote:

> Thanks, the DoF increased but I did not really see a jump in focus point
> as I stopped down. I would have expected Solms to have noticed this?
>
> I have had a 75mm Summicron on order since last July ;-) Taken far longer
> to arrive than my other "impossible to get" lenses (35mm Summilux asph FLE
> and 50mm Summilux asph)...
>
> john
> ________________________________________
>
> I am going to assume you got different results from different apertures,
> and
> that manifested itself at differently at different distances...on your M9.
>
> If my memory serves me correctly, this is a problem with this specific
> lens.... ( and maybe others, I forget)  It has to do with the design.
>
> The modified cam works based upon distance, making it more accurate at
> any/all distances.  For $90, if that would fix it, it would be a bargain!
>
> There is no aperture correction possible... maybe.....
>
> Apparently the 75 Summicron does not suffer the same problem.  With the
> prices of the Summilux being what they are, you might just be able to swap
> a
> Summilux for a Summicron.... suffer the 1 stop loss, and come out a winner.
>
> Ditto the Summarit, but it is slower... and a lot cheaper.... but 1 1/2
> stops slower...maybe not what you were after.
>
> Frank Filippone
> Red735i at earthlink.net
>
>
> Just what is possible with tweaking?
>
> I tested my 75mm Summilux yesterday, tripod and 1.4x magnifier, at f1.4-f8
> in full stops. I am more interested in the wide open focus.
>
> It is spot on 10m to infinity.
>
> It back focusses greatly 3m to 8m (+10cm)
>
> It back focusses less so <3m
>
> Will it ever focus correctly at all distances?
> Will I have to choose an aperture and distance to get optimum calibration
> and the rest all fit around that?
>
> thanks
>
> john
>