This is a repeat of what I sent to Robert via email. It might be of use to others, however, so I will post it here in the open. I have had my F5 for about 6 weeks. I initially loaded it with alkalines just to see how many rolls I would get. I have shot 12 rolls (36 exposures) and am still on the same set. I have a set of lithiums and another set of alkalines I carry in my bag in anticipation of the alkalines in the camera dying, but this has not happened yet. Some things I do: Is it important to turn the camera off when not in use? Don't know, but I do. In fact, I have developed the habit - and it is a habit so I don't think about it - of turning the camera off even if I won't shoot a picture for several minutes. I have no problems with quickly turning the camera on for a shot(s), leaving it on for brief periods, then turning it off. I primarily use my 80-200/2.8, with autofocus, so the camera is having to move some glass. I also have the viewfinder display set at the default of 8 seconds (I have read of others setting it at 4 secs, but I have had no problems with 8). One thing I do is use manual rewind. How much alkaline power this conserves I can't say, but I'd be willing to bet it saves a lot. However, I have used auto-rewind on four of 12 rolls. I have shot on the Oregon Coast and Las Vegas in the last 6 weeks (lows in the mid 40s in both places), so the low temps haven't been what you describe. This also makes a difference, but probably doesn't account for your severe battery drainage. I also did not use the camera for 3 weeks, and unloaded the batteries from the holder just to be safe. Reloaded them this past week and shot three rolls, no problems. Lastly, I use Energizer Photo alkalines (the package says these are long life alkalines designed for use in modern cameras and other electronic devices). Wal-mart sells these in packages of 4 for something like $2.50 (haven't bought any in 6 weeks so I don't quite remember the price). I'd have to say they work. The only drawback to alkalines so far for me is the weight. I plan on doing some shooting this weekend in colder weather, and will see how they behave. I have my lithiums just in case. Rick Reeves Las Vegas
