[rollei_list] Re: OT: Replacing Mercury Cells in a Nikon F
- From: "Eric Goldstein" <egoldste@xxxxxxxxx>
- To: rollei_list@xxxxxxxxxxxxx
- Date: Sat, 3 May 2008 23:30:16 -0400
The output of SO cells is virtually as flat as those of Hg cells.
Eric Goldstein
--
On 5/3/08, Richard Knoppow <dickburk@xxxxxxxxxxxxx> wrote:
> Thats just the problem, you can't "recalibrate" because the error depends
> on the voltage and that is not constant for most types of cells. The great
> virtue of the mercury cell is that its voltage curve is very flat. That
> allows using the cell without a regulator. Regulators in general dissipate
> some of the energy in the cell so, if its possible to do without one its
> desirable.
> My solution is a makeshift. I have no idea how long the cells will last
> but the meter has a definite check point so there is a positive indication
> if the cell voltage changes much. This gives me a simple and cheap way to
> keep the TTL lightmeter in this camera going, at least for the present.
> I have a junk finder so I can see if there is room in it for some sort of
> regulator. That would allow using alkaline cells although they are not long
> lived compared to mercury cells either.
---
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