Using old cameras can be troublesome dues to the use of old mercury cells ...that are now prohibed !
One solution is to use a suitable diode (see instruction). the assembly needs a DO35 package.
I made several adapters :
SR44 to PX625 : works well
SR44 to PX675 : can be tricky/impossible to insert with the camera as the PX675 and the SR44 have the same size and the adapter add some thickness
SR41 to PX675 : Haven't tested as I don't have SR41 ....but you have the source to adapt !
The last image is a printed one with the diode in it. Juste be sure to put the diode in the right way in respect with the battery
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