Retina Automatic 1 Prontormat-S (04)

            Kodak Retina Automatic 1.

Well, with the Alfred Gauthier Prontormat-S shutter so conveniently away from the body it's a good time to study some of it's innards.

This is a view on the backside.

During filmtransport the shutter is armed by rotating the Shutter Cocking Axle 180 degrees cw (clockwise) as seen from this side.
During this motion also the Step Cam Ring is turned ccw so that the Step Cam is just free from the Needle Follower and locks in that position

When the shutterbutton is pressed (and not blocked) the Shutter Release 
 unlocks the Step Cam Ring which then rotates cw by springforce till it hits the Needle Follower. So the rotational angle of the Needle Follower determines how far the Step Cam Ring can rotate and so also how far the Diaphragma Blades are closed because these are connected to this Ring . Next the shutter itself is fired.

The above sequence with the Step Cam is only valid for the shutter used in the AUTO mode. In B or Flash Mode the diaphragma is set by the shutter mode ring. So even the Retina Automatic 1 can be used in a kind of manual mode when you set the shutter mode ring to a diaphragma setting in the Flash mode range. The shutterspeed in Flash mode is 1/30 Second.

On the rim of the shutterhousing there is an (in height) oval shaped slit. Only in the AUTO-position of the Shutter mode ring the Shutter Button Deblocking Pin on the Kodaks housing (not visible in this picture) is NOT pushed in. I assume that in that case the Shutter Button Deblocking is only possible when there is enough light catched by the Selenium photocell and that the mechanisms for that are somewhere in the body of the camera.

There is also a Pin sticking out of this shutter. It's heigth out of the shutter is altered whenever one of the lens focus distance symbols o, oo, ooo is reached. This heigth difference is made visible in the viewfinder of the Retina were you see the same symbols appearing. This makes changing the focus-zone (Portrait, Group, Landscape) possible without looking at the focus distance scale on the lens. 

To the Post for Electric Contact was soldered the red wire. It's just leading to the flash synchronisation contact somewhere in the shutter.

Taken on: May 24, 2010

Tags:

Kodak

Retina

Gauthier

Prontormat-S

back

side

view

Step

cam

needle

electric

shutter

cocking

Reomar

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Sets appears in: • Kodak Retina Automatic 1 Prontormat-S Trouble

Groups appears in: • THE KODAK RETINA • Camera Repairs

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