Archived posting to the Leica Users Group, 1997/11/24

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Subject: Re: 50 Noct. in bright light
From: Paul Schliesser <paulsc@eos.net>
Date: Mon, 24 Nov 97 14:19:20 -0400

>>    I'm just curious about this. Everything I read about the 50/1 Noctilux
>> says it isn't for general photography and only for low light use.

50mm lenses are very specialized. A lot of people think that the aperture 
rings are there so that the lenses can be stopped down: this is not true! 
The aperture control is there only to "turn the lens off" when it is not 
in use.

The Noctilux is ONLY for shooting at f/1. To shoot at f/1.4, switch to a 
Summilux; for f/2 shooing you should only use a Summicron; that's why 
they made it. Get out your collapsable Elmar for f/2.8, and you need to 
have a screw-mount Elmar for f/3.5.

If f/3.5 is too wide an aperture for your shot, wait for it to get dark, 
so you can start using the faster lenses again.

>> So what
>> would happen if I mounted a Noctilux on my M3 (and don't I wish I could
>> afford to!) and took pictures in the noonday sun? Would civilization, such 
as
>> it is, crumble?

Why take such a big chance? To be safe, noonday shooting with the 
Noctilux should be done with ISO 12 film, pulled 2 stops during during 
processing, so you can use f/1.

- - Paul