[LargeFormat] rest

[philip Lambert]

Is there an easy way of checking the accuracy of shutter speeds? I have
several old lenses whose shutters seem to run slower than a new shutter.
Philip
----- Original Message -----
From: "Clive Warren" <cocam@cableinet.co.uk>
To: <largeformat@f32.net>
Sent: Monday, January 29, 2001 7:43 PM
Subject: Re: [LargeFormat] rest


> At 5:13 pm +0200 29/1/01, Dave Southwood wrote:
> >is it bad for an average l - format lens to left in the shutter open
> >position ('T') with the diagphragm dilated while not in use? its
> >very convenient but seems as though, when its cocked, the mechanism
> >is under some duress and might lose its original tensile properties
>
> Leaving the shutter cocked is probably a bad idea as the main spring
> which operates the shutter is under tension and could eventually
> stretch.  This will affect the shutter speeds - ie they may become
> longer over time.
>
> Generally, the best way to store a shutter is with the speed setting
> at something low eg 1 second or B or T and the shutter UN-cocked.
>
> In practice, most shutter speeds are off anyway but there is little
> point in making the situation worse if you can help it. This is
> particularly true for older shutters where the spring has probably
> lost some of its tension anyway....
>
> --
> All the best,
>
>              Clive Warren   http://www.f32.net
>                             Large Format travel and stock photography
>
> _______________________________________________
> LargeFormat mailing list
> LargeFormat@f32.net
> http://www.pairlist.net/mailman/listinfo/largeformat
>