Using a T flash on a 4 (as opposed to 4T) has no effect on camera battery
life as
the OM-4 viewfinder flash LED is not powered by the camera batteries as the LED
in
early 2Ss are.
"Idle" Drain (display off) in early unserviced OM-4s was as high as 35 micro
amps as
opposed to 8-10 microamps in a T or 4Ti.
John
sunil manga wrote:
> Dear BRYANT,
> in terms of battery life between OM-4 & OM-4T the difference
> is about '5x' using a
> T-32 flash. Otherwise the battery goes onand on.
> Sunil.
>
> Bryant Wetzel wrote:
>
> > John,
> > Thanks for the good information. I know that this OM-4 has had the
> > same
> > set of batteries for better than six months and they are still going
> > strong. So, if I put a meter in line with the battery and measure current
> > drain, I should wait until the meter circuit times off and then note the
> > drain? What could I expect in the way of differences between a 4 and 4t?
> >
> > Regards,
> >
> > Bryant
> >
> > ----------
> > > From: John Hermanson <omtech@xxxxxxxxx>
> > > To: olympus@xxxxxxxxxxxxxxx
> > > Subject: Re: [OM] OM 4 for Sale, UPDATE
> > > Date: Friday, June 26, 1998 10:14 PM
> > >
> > > Yes, that is a misconception. The red LED mod, part no. ZJ182700 is for
> > use in
> > > the 2s, 2 spot/program only, and was never needed in the OM-4. There
> > never was a
> > > flash sync mod for the 4 because the OM-4 viewfinder LED (red or green)
> > was never
> > > powered by the camera batteries.
> > > As body production progressed, parts and circuits were improved and that
> > could
> > > include the circuit inside the top cover which featured a transistor for
> > flash sync
> > > control. In the original 4, this transistor was glued into a plastic
> > holder under
> > > the main body flex. There are atleast 3 or 4 flex circuits inside an
> > OM-4.
> > > My OM-4T has a green flash LED. The most improved 4 circuit came out in
> > the 4T
> > > (and 4Ti). Whether the factory changed LED colors when they did this I
> > don't know.
> > >
> > > I do know that battery drain was dramatically improved from the 4 to the
> > 4T, and
> > > that drain had nothing to do with T flash use. (Which was the subject of
> > the red
> > > LED mod in the 2S).
> > >
> > > John
> > >
> > > Bryant Wetzel wrote:
> > >
> > > > John,
> > > > I have an Olympus fiche that clearly shows two top covers for
> > the OM-4,
> > > > one is a smaller circuit and the later one is a much larger circuit.
> > The
> > > > early OM-4 had a green led, and the later OM-4 had a red one. Am I
> > wrong?
> > > >
> > > > Regards,
> > > >
> > > > Bryant
> > > >
> > > > ----------
> > > > > From: John Hermanson <omtech@xxxxxxxxx>
> > > > > To: olympus@xxxxxxxxxxxxxxx
> > > > > Subject: Re: [OM] OM 4 for Sale, UPDATE
> > > > > Date: Friday, June 26, 1998 4:38 PM
> > > > >
> > > > > Just a short correction, the OM-4 was never part of the Green LED/Red
> > LED
> > > > problem.
> > > > > That was the OM-2S only.
> > > > >
> > > > > John
> > > > >
> > > > > Bryant Wetzel wrote:
> > > > >
> > > > > > All,
> > > > > >
> > > > > > Below is a new update as of 6-26-98 at about noon Denver
> > time
> > > > so you will
> > > > > > know what is left out of the bunch of OLY goods I am selling.
> > > > > >
> > > > > > Regards,
> > > > > >
> > > > > > Bryant
> > > > > >
> > >
> > >
> > >
> > >
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