>> |
ac
!!VPzQAxYPAMA
>>156624 Mercury batteries were 1.3V. Alkalines are 1.5V, kinda.
I.e., Alkalines slowly lose voltage over time. Mercurys, on the other hand, keep a constant 1.3V pretty much up until the day they die, when they drop suddenly and sharply down to zero.
For this reason, most camera makers who made cameras to take mercury cells didn't put any voltage regulation hardware in there, so an alkaline's gradual decline into senility will mean inconsistent metering even if you get it adjusted for the 1.5V. I.e., you can't just set an EV comp because the compensation needed will vary with time.
C41 film generally has enough latitude that it's not a big deal, but it can screw you over with a less forgiving film.
The best option is to get a CRIS Camera MR9 adapter, which lets you use a silver-oxide cell. Silver-oxide batteries have the same straight voltage curve as mercuries, and the MR9 adapts 'em to fit and give that voltage curve at the actual correct voltage.
|