110A Packfilm Conversion: The Rangefinder

front screw location
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front screw location

Since this two-window finder is going to be replaced by the single-window from a Model 900 I won’t be going into any detail about its inner workings.

Instead, just remove it.

The front only has a single screw

rear screw locations
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rear screw locations

There are two inside the back.

The right side is a bit tough, you’ll need a philips head screwdriver small enough to fit into the recess.

The left screw is larger than the other two, save them.

hotshoe pieces; don' class=
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hotshoe pieces; don’t remove the last piece

The hotshoe contains the last screw. Its wired to the lens’ PC flash socket by 2 wires.

Remove the screw, metal contact and plastic spacer.

What you don’t see is one of the flash wires within the finder housing held by the screw you just removed.

The other contact is soldered to the last piece by a post extending into the finder housing. Since I am going to be replacing this hotshoe, its quite alright to cut the wire. If you are going to keep the original hotshoe keep track of what goes where.

With the housing off, its time to gut what’s left.

4 - removemirror
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unhook springs, yellow & purple arrows; push, green arrows; pull up, red arrows

The first part to remove is the focus mirror. It is held to the post by tension from the bent copper backing. And to keep it taught, there is a bent wire, purple arrow, you need to unhook.

Push, green arrows, and pull up on the mirror to remove it.

Unhook the spring, yellow arrow, to detach the cam arm from the finder plate.

remove 3 screws and 1 bolt
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remove 3 screws and 1 bolt

There are 3 screws, red arrows, and 1 tiny bolt, blue arrow to remove the plate.

remove small bolt, mirror post & lossen cam screw
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remove small bolt, mirror post & lossen cam screw

Next to go is the stationary mirror which is held down by a small bolt and the mirror post which is actually threaded into the camera body. Later, this hole will need to be enlarged to accept the Model 900 finder’s mirror post.

If you are going to keep the 110a finder stock, be careful not to bend or lose the tension wire beneath the post bolt, green arrow

Loosen the focus cam screw, yellow arrow, to remove the cam and arm.

If keeping 110A finder, note the location of the cam and the arm. This is infinity focus.

pry but don' class=
image-935

pry but don’t bend

With little force, pry up the pieces. How much care you take with this depends on if you will keep the 110A finder or swap for a 900.