----- Original Message ----- From: Frantisek Vlcek Subject: 67 & batteries in LOOONG exposures
> Hi, > a friend who has a 67 goes to mountains and he plans to do some > long bulb exposures in the night (that's usually around 30minutes > or more). He needs to know how much batt. to take (as they are also > somewhat expensive) > > Anybody has tried how much total time open can you get > out of the batteries? The owners manual says you will get approximately 6 hours of timed exposure out of a fresh silver oxide battery. > > Also, can you stack up regular 44 type batteries (4 of them), or > two 3v Lithium batteries (the 2/3DLN type I think) which are the > height of 2x44 ? Yes to both. If you dissasemble a PX28 silver oxide battery, you will discover 4 s76 batteries inside. If you take apart a PX28 lithium, you will find 2 DL1/3n batteries inside. > > What is the best type for it - silver oxide or lithium? I guess > Lithium, as they have the best temperature range effectivity. Crap shoot, as the silver battery packs more effective power, but it loses it faster in the cold. If the person has sure hands, he could pop the battery out and warm it before using it. How cold is he expecting to see? William Robb - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
