Modern Classic SLRs Series :
The MF-4 250 Bulk Film Back Part III

Pull Film.jpg (8k)
6.Load the supply cassette.

Load the first cassette by making sure that the two pins on top of the cassette slide into the cutout inside the cassette chamber. As the cassette spindle knob returns to its original position by spring force, keep pulling it up until the cassette is fully seated into place. Now repeat steps 5 and 6 for the cassette on the takeup side.

Full backview.jpg
7. Confirm the cassettes' positions.

When the cassettes are loaded in their correct positions, the red dots on the lower part of the outer shells of the cassettes will line up with the white lines on the cassette chambers.

RewindBack.jpg
8. Take up slack of the film.

Rotate the cassette spindle knobs in the direction of the arrows to take up any slack of the film. At this time, check to make sure that the film sprockets engage the perforations on the edges of the film.

Hinge.jpg
9. Replace the rear cover.

To replace the rear cover, first insert the cover's hinge shaft into the hinge.

Sopport pin.jpg
Closeback.jpg
10. Turn the rear cover support pin knob clockwise until it stops. 11.Close the cover.
Push the cover down forcefully until it clicks.

Full Backview.jpg
12. Set the open/close knobs to the "CLOSE" position.

Turn both open/close knobs to the "CLOSE" position. This makes film transport smooth. Rotate the cassette spindle knobs once again to take up any slack of the film inside the cassettes.

13. Unlock the shutter release buttons on the magazine back and the motor drive.
Lift up and turn the shutter release button locking ring on the magazine back to set the white index line at the red dot, unlockinq the shutter release button. Pull up and set the motor drive's S-C mode selector to either "S" or "C."

Frame.jpg
14. Set the motor drive's frame counter to the orange dot.

15. Make five (5) blank exposures
By depressing the shutter release button on the magazine back, make five blank exposures. While making blank exposures, make sure that the white dots on the cassette spindle knobs rotate in the same direction (toward the takeup side). This indicates that the film is being transported correctly.

Notes:

1) When you make blank exposures with the motor drive's S-C mode selector at the "C" position, be careful not to waste film by making too many blank exposures.
2) You are advised to set the camera's shutter speed diaI manually to a high shutter speed for making the blank exposures rapidly. If the shutter speed dial is set at the 'A" position and the blank exposures are made with the lens cap on, the shutter will stay open for a long time as soon as the camera's frame counter reads "1".
3) The camera's film advance lever Cannot be used to advance the film when the magazine back is mounted on the camera


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Modern Classic SLRs Series :
The MF-4 250 Bulk Film Back Part III
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