Instruction manual

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when you use the viewfinder you may not be able to see the full frame if you have
to put your glasses on to look through it.
Diopter correction is a feature that allows you to focus the image in the optical
viewfinder, usually by means of a knob, slider, or dial located next to the
viewfinder. This feature is normally only found on larger cameras, like the D200.
Part of mission preparation includes setting up the camera, and this includes
setting the diopter correction. Look at something within shooting range, raise the
camera's viewfinder to your eye, and adjust the diopter until the scene is sharp.
For the D200, press the shutter-release button halfway and adjust the diopter until
the focus brackets are in sharp focus.
1.2 Batteries
One difference between digital cameras and film-based models is that most
digital cameras tend to consume a lot of power. This means that you need to use
high-performance batteries and that you'll probably want to buy a set of
rechargeable batteries that fit your camera and the portable GPS (usually ‘AA’
batteries) that attaches to the camera, if applicable.
Some cameras come with custom-designed rechargeable Lithium Ion battery
packs in the box. If this is the case, there's no decision of which brand and type
of batteries to buy; get an extra battery pack from the manufacturer and keep it
charged as a spare.
Older-style batteries (particularly Nickel Cadmium - NiCad) had what is
termed the memory effect: if you ran a rechargeable battery down only halfway
before recharging, the battery would eventually give you only half as much battery
life. This required users to drain them completely before recharging. This is no
longer an issue with the new Lithium Ion and NiMH batteries, so after the second
recharging you can top them off anytime (such as just before a mission).
Even the newer rechargeable batteries can only be expected to last about
three years (five at most). Once they are spent, you should dispose of them
properly (or recycle in the case of lithium ion batteries).
If battery charge becomes an issue during a sortie, remember that the two
biggest drains on the batteries are the camera’s LCD screen and the flash (not
applicable to CAP missions). Turning off the LCD screen will extend battery life
during a sortie.
Cold temperatures will shorten battery life. Lithium Ion batteries (not the
rechargeable types) often function much better in cold weather than do NiMH or
alkaline batteries.
Refer to the battery section in the “Between Missions” chapter for battery
care.
1.2.1 Lithium Ion
Lithium ion batteries are used in many digital cameras because they pack a
lot of energy into a small size, are lightweight, and performance is good even in
cold weather conditions. They cost more than NiMH batteries, but they usually
give you more pictures per battery (the new Energizer e Lithium battery allow you
to take so many pictures that the higher cost is offset by the number of photos you
get per battery).