Re: [Leica] 21mm SA - metering with M6TTL

[Lucien <director@ubi.edu>]

Mark Pope wrote:
> 
> Hi,
> 
> I had a look at a 21mm Super Angulon on a M2 last week.  I noticed a couple
> of threads recently about this lens.  Many of the comments were borne out by
> some slides that I saw that had been taken with this lens.  They were
> stunning.
> 
> As a A 21mm is a lens that I would like to have (one day), I have three of
> questions:
> firstly, if a 21 SA is fitted to an M6TTL, will the meter work?

Mark,

In November 1988,  Jeremy Kime asked somebody to modify 
his Super-Angulon 21/3,4 in the way described on the
following website:

<http://reality.sgi.com/jessen_esd/angulon_mod.html> (closed today)

> Modifying the Leica Super-Angulon f3.4 :

> TTL metering is possible.
> Not for the Faint-Hearted.

> The f3.4 Super Angulon can be made to work with the light meter on the M6 body. 
> This process involves "machining" the rear collar of the lens 
> (though it can be done with simple tools, outside of a machine shop). 

> 1.It is assumed that you are ready to dismantle and modify your lens. 
> 2.The meter will read 1/3 stop under, which is compensated for by advancing 
> the film speed dial by one notch. 
> 3.The lens should be focused to close range in order to accurately meter. 
> Close-focusing is needed to nudge the rear glass out of the way of the 
> metering eye, and can be quickly done and then un-done while shooting.
> (However, on an M6 with the spot size reduced for tighter metering pattern, 
> this close-focusing has been found to be unnecessary.) 

After modification, Jeremy Kime wrote:

> Got the lens back today, it meters.
> I think the suggestion that it would only be a 1/3 of a stop is generous, so
> far it seems to be about a stop, haven't put any film through it yet but if
> I can end up relying on it being a stop then thats a nice round number to
> deal with and still cheaper than getting that new Elmarit-M ASPH.
> I'll try and test some different apertures on the metering tomorrow.