Luna Pro may have as many as 3-4 adjustment pots under the back plate.
As far as non-linear 1n-6263 diode use in the OM-1/1N, meter is so close
it does not matter (as long as cds are good). On the button at BV15,
BV12. BV9 within 1/8 - 1/16 stop, same at BV6.
I had an exchange with a couple of guys on one of the forums, seems they
really didn't want an easy solution. One guy was going to build a
battery pack power supply using 4 - AA and the "proper" circuit to power
his meter. A back pack with a car battery might be good too. I finally
suggested that it appeared they had no intention of ever having a
working meter or taking pictures, they just wanted to show who would be
more "accurate".
___________________________________
John Hermanson | CPS, Inc.
21 South Ln., Huntington NY 11743
631-424-2121 | www.zuiko.com
Olympus OM Service since 1977
Gallery: www.zuiko.com/album/index.html
On 2/10/2012 4:48 PM, Moose wrote:
> On 2/10/2012 12:53 PM, Chuck Norcutt wrote:
>> That's how John H does OM-1 conversions.
>
> Well, that's not all he does. He also adjusts the meter circuit.
>
>> You'll find that and other solutions discussed
>> here:<http://www.buhla.de/Foto/batt-adapt-US.pdf>
>
> A very useful resource, which looks to have been updated since I last
> saved a copy.
>
> Still, the diode solution introduces some modest non-linearity
> inherent in the way the diode operates, as John has said here several
> times. So when a meter provides calibration capability for battery
> differences, that would seem to me to be the better solution.
>
> As the relatively lowly Super Pilot has such adjustments, I can't
> imagine the Luna Pro doesn't. Not only would finding a schematic of
> the circuit and/or instructions for adjustment likely give better
> results, it is much less expensive.
>
> Light Adjustments Moose
>
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