Non Hg devices

From Camerapedia.org

Although the following cameras were designed to use a 1.35 volt mercury cell, they include voltage regulation circuitry and thus work correctly with an alkaline battery and do not require a mercury cell, an alternative 1.35 V cell or an adapter. Each camera takes a single cell unless otherwise indicated.

(Many cameras and lightmeters were designed for and require a 625 mercury cell: list of cameras and list of exposure meters.)

Manufacturer/Brand	Model	Battery size
Pentax	Spotmatic SP-F/SP-F Motor/SP-F Data II	625
Pentax	All other Spotmatics	400

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