Re: [Leica] Disassembly of 35 Summaron

[John Collier <jbcollier@home.com>]

Lens disassembly procedure for a bayonet mount lens:

Remove lens retaining ring from the back of the lens.

Pull out the optical assembly from the focusing barrel.

Remove C-ring from the back of the optical assembly and the two connecting
screws from the slots in the aperture dial.

Pull off the aperture dial.

Unscrew the centre cone from the front of the optical assembly.

Lift off the name ring.

Remove the three screws now exposed and lift off the filter ring.

A retaining ring holds the front lens group (The group itself is not
threaded but it's a close fit and can jam easily. If it does jam, refit the
retaining ring and try again)

Unscrew the rear lens group.

A hole is provided in the rim of the inside element mount for the purpose of
pulling it out with a small wire hook. This mount is not threaded either.

Shake out the slotted ring and the diaphragm blades forward.

Look at all the little pieces, shards of chipped glass and cry. Buy a bottle
of single malt and look in Shutterbug for another lens.

Cheers,

John Collier

If the threaded rings are binding after a few turns, apply a SMALL amount of
WD-40 with a q-tip. Disassembly info was from the "Leica Camera Repair
Handbook" by Thomas Tomosy.



> From: Rob McElroy <idag@pce.net>
> 
> Hello All,
> 
> I have a screwmount 3.5cm f3.5 Leitz Summaron that has quite a bit of
> cloudiness on some internal elements that I want to clean off.  The trouble
> is,
> neither I nor my local camera repairman can figure out how to disassemble the
> lens.  Spanner-ring notches exist on two different retaining rings on
> the rear of the lens, but when trying to turn them out, they are met with very
> stiff resistance after a few turns.
> 
> Any ideas on getting it apart?   I don't need advice on where or who to send
> it to, only on disassembly information.
>