Jürgen,
First, congratulations. Great cameras.
It takes a PX28 (or equivalent type) 6 Volt battery.
One battery would last for at least 20.000 exposures. If only you would manage to get that many exposures before the battery drained all by itself...
The camera's basic functions are quite simple.
The most important bit is not to damage the shutter curtains.
To help you not do that, the first curtain will retract ('fire') when you remove the magazine.
A 'feeler' button on the rear, next to the upper magazine hook, is responsible for that.
However, when you fire the shutter with the magazine off, or reset the shutter, the curtains will appear again. What ever you do: do not touch them!
Linked to this is the need to reset the curtain before (!!!) you remove the darkslide from a newly attached magazine.
Forget that, and you may waste a frame. So always remember to do this.
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Next, the battery.
With the shutterspeed ring set to "C", it will not need one. The focal plane shutter will work like the auxillary shutter in the 500-series machines, and you will need shuttered lenses to get timed exposures.
Always make sure the camera is in the 'ready'-state before inserting a battery. If you don't, the battery will drain rather fast until you do reset the camera.
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You reset the camera by pushing in the disk visible in the center of the wind crank during the first bit of the rotation.
When you do, the camera is reset, but the film in the magazine is not trasnported. So you can use this to do double exposures too.
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The shutter speed ring can be set to all click-stops, also those in between the ones with numbers. When set, for instance, between "125" and "250", the shutter will use the speed that's in between these two.
All click-stops, except the ones between "1" and "B", and between "B" and "C". How the camera will behave when you do appears to differ between production runs, but it will not result in something you want (my FCW's lock the shutter open when released with the ring set between "1" and "B", only to close when i move the shutterspeed ring to either "B" or "1". And act as if set to "B" or "C" when set between these two settings. I don't know which).
There is a little lever on the camera's left, above the battery compartment. When set to "O", the shutterspeed ring is free to move, Set to "L" (for "lock"), it is locked. This is usefull when using the shutter in shuttered lenses, with the camera's shutterspeed ring set to "C".
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When using the shutter in shuttered lenses, the shutterspeed ring must be set to "C".
When using the focal plane shutter with shuttered lenses, the shutterspeed ring should of course be set to the speed you need to use. The shutterspeed ring of the lens must then be set to "F" (on CF and later lenses), or to "B" (on "C" lenses).
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When using flash, make sure hat you connect the synch cord to the shutter that is in use: to the PC-terminal on the body when using the focal plane shutter, to the PC-terminal on the lens when using the shutter in the lens.
The focal plane shutter will 'synch' with all speeds up to 1/90 (marked "X" on the shutterspeed ring).
When you set a faster speed, the flash will not fire. So if it doesn't, don't start by loking for badly connected, or broken synch cables, or faulty flash units, but check the shutterspeed ring first.
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You can remove the wind crank (push the metal tab down, not towards the camera, and rotate anticlockwise).
When you do, you reveal the bayonet mount used by the winder.
But you then also can program the mirror. You will notice there is a red dot on the axle, and numbers 1 through 3 on the crank. The numbers correspond to the mirror movement:
- 0: the mirror goes up, and stays up until you reprogram the thing (this is real "mirror lock up". People often call mirror prerelease that, but this is the one and only real thing).
- 1: the mirror moves up when you release the camera, and stays there. It comes down again when you turn the wind crank. Just like the mirror in 500-series cameras.
- 2: the mirror goes up, and comes down again: instant return mirror.
To program the mirror, you have to remove the crank, pull out the axle, rotate it, and let it go back in again. When you do, you'll notice there are no clear click stops, nor is there an indication of at what setting it is. So it's a bit of a trial-and-error thing.
You can use any setting any time, i.e. it doesn't matter what type of lens you are using, or anything. It's up to you.
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Do not (!!!) attach a Hasselblad Polaroid 80 back. It has a glass plate that protrudes enough to damage the shutter curtains beyond repair.
Polaroid 100 (and later) backs have a glass plate too, but are safe.
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Changing lenses, viewfinders, magazines, etc., is the same as with other Hasselblads.