pre mna hlavna nevyhoda hentakych strojov je baterkove riadenie zavierky [ak som teda spravne pochopil http://www.mir.com.my/rb/photography/hardwares/classics/emfgfg20/fg20/spec.htm ] lebo v zime sa mi pri dlhsom foteni v -10 a menej ;) stalo, ze to sice meralo, aj cvakalo, ale nejak pomaly az lubovolne.. [praktica bx20]

na http://en.wikipedia.org/wiki/Nikon_FM2 je ze:
The camera features Nikon's famous close tolerance assembly and minimal space lubrication, meaning that it will reliably operate in temperature extremes of −40 °C to +50 °C.

ale kazdopadne sa na tom fg20 da 1/90s [mechanically controlled 1/90 sec. at M90 setting] vzdy pouzit aj bez baterky, za tu cenu oplacko ;)