Re: [Leica] Difference between leica meter

["Logan Reinwood" <reinwood007@hotmail.com>]

>From: John Collier <jbcollier@powersurfr.com>
>Reply-To: leica-users@mejac.palo-alto.ca.us
>To: <leica-users@mejac.palo-alto.ca.us>
>Subject: Re: [Leica] Difference between leica meter
>Date: Wed, 09 Jan 2002 08:16:42 -0700
>
>The M meters mount in the accessory shoe of the M camera and couple to the
>shutter speed dial. You set the desired shutter speed, take a meter reading
>and set the lens to the aperture displayed.
>
>The M and MC meters use selenium cells which have the benefit of not 
>needing
>a battery and a colour response that closely matches our own. They also 
>have
>limited low light performance, clumsy booster cells to try and work around
>this and the metering area is very wide (65 degrees which is not that 
>useful
>at times). The cells also oxidise over the years and require replacement.
>There are only two places that I know of still doing selenium cell
>replacement, fortunately, it is not that expensive.
>
>The MR meters use powered cds cells and a have good low light sensitivity.
>The metering area corresponds to the area of the 90mm lens so semi-spot
>readings are easy to do. They use a 1.35v mercury battery which is now
>difficult to find but there are several easy fixes for this.

Hi John,

Thanks for your explanations.

How do you fix the 1.35v battery problem? Put a 1.5V battery and compensate 
with the ISO setting ?

regards, logan




The colour
>sensitivity tends to darken reds and yellows if I remember correctly and 
>the
>meter is subject to memory problems if exposed to bright light (it can
>sometimes take 2 or 3 minutes for the meter to be accurate again). The MR
>has a "T" shaped meter on switch out the side that interferes with the
>rewinding on M4 and up cameras. The MR-4 has a meter on switch on top of 
>the
>meter which solves this problem.
>
>The ISO/ASA dial is easily bumped on all the M meters so keep an eye on it.
>
>I use a MR-4 on my M2 and M4-2 cameras and, with careful metering, accurate
>exposures to with a 1/3 stop are possible. It is easier and much quicker to
>use the built in meter of my M6TTL and so I tend to use that instead. So I
>meter with my M6TTL and transfer the settings to the other cameras.
>
>John Collier
>
>
>
> > From: "Logan Reinwood" <reinwood007@hotmail.com>
> >
> >
> > What are the differences between the leica meters (MC, MR-4, etc.)?
> > Which one is the latest made ?
> >
> > Are they still usable, precise eough? How to differentiate them?
> >
> >
>
>--
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