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which 50mm?

Thanks mr. rusty!
Noel and myself have been around the issue of LR44 vs SR44. The OM40, as well as all OM 2 digits can be used with LR44 as they have the necessary circuitry to compensate for the expected alkaline behaviour.
But, LR44 don't last as long as SR44.
My OM-2SP is on its second month with LR44 and has had a dozen or so rolls. So far so good!
BTW, any time you visit London, drop a PM. I'm sure a meeting and some street photography can be arranged!
 
For the same battery technology
Zinc>silver>alkaline in service capacity.
The zinc is cheap & if you block some of the holes it should last some time.
The alkaline voltage will dip alarmingly under load more so as it uses up service life.
At the end of a days shoot I remove all batteries.
One can measure the 'dark' current of the camera with a multi meter so - in one of my OM4 was 7.0 mA!
 
I have an OM-2S which needs to have its batteries removed when the camera isn't being used. I am told this is normal for an OM-2S. The OM-10 seems to put very little strain on its batteries.
 
I have an OM-2S which needs to have its batteries removed when the camera isn't being used. I am told this is normal for an OM-2S. The OM-10 seems to put very little strain on its batteries.

My OM2s usually gives me between 3 and 12 montns use out each set of silver-oxide cells. I don't remove them between uses. I've owned the camera since it was new.
 
Don't underestimate the Nikon Series E lenses. my 50mm f/1.8 is an outstanding performer for still and video.that said,I prefer my 50mm f/1.4 for the speed and color performance
 
I have a fairly complete collection of Nikon lenses from f20 to f300mm.the focal ebgths, I use most are: 24,35,50 and 85mm;all great in their own right;I wouldn't substitute either one for another.There is good reason to have a 50 and a 35mm in your bag as long as you know when to pull them out