Argus C3 Lens Removal and Installation
I found lens removal to
be somewhat troublesome as compared to the bayonet mount of the Leica
M3, and even compared to the Pentax screwmount. This is because
the lens must be coupled to the rangefinder using a gear that goes
between. The removal is not too bad though the small pieces (gear
and retainer) must not be misplaced.
First the gear retainer
is unscrewed while the lens is set to 3-feet. (It's set to 5-feet in
this photo, which is fine too. This allows the removal of the gear
retainer without interference from the lens housing. Some C3
retainers are smaller and should be removable with the lens set on any
Next the gear is
removed from between the lens and rangefinder.
Next the lens is simply
Installing the lens is
the reverse procedure with the lens focus distance matched to the
The 50mm lens has no
markings. For that lens, I retract the lens all the way back into
its housing (infinity) after screwing it back on the camera. I set
the rangefinder to infinity, then carefully drop the gear between lens
and rangefinder wheel, assuring the last gear on the lens engages the
gear with the rangefinder set to infinity.
Then I carefully adjust
the rangefinder to make the lens extend, allowing me to install the gear
cover without having it interfere with the lens housing.