leningrad camera motor repair

Hi Luiz,

Thanks lots for you help !

Just received a cheap non working Leningrad.

It needed vertical rangefinder adjustment (horizontal was OK)
Yesterday I adjusted it (by the three screws) - I needed to remove top plate. Alas, now horizontal it's off :(
Little screw on the front plate look thiny - I'm reluctant to pick up my screedriver...

BTW built quality is very hight, the rangefinder is impressive :

If you want a reliable rangefinder it will be needed to do a general refurbishment.

you need to remove completely the RF

to do so, in na accurate manner you need first to remove the slow speed gear train.

first of all remove the lens! (1)

set the speed to "B" and carefully remove the gears

to do so, loose the three screws of the first Picture.

Remove the screw 2!




http://www.ussrphoto.com/UserContent/2522015_leningrad A.png

Place a thin screw driver in the hole 2!
0r a needle -to avoid dephasing the gerar positions.





http://www.ussrphoto.com/UserContent/2522015_leningrad b.png

now remove the screus 3 and 4.


to be continued...

while awaiting, see the article:

http://ussrphoto.com/Wiki/default.asp?WikiCatID=50&ParentID=49&ContentID=1589&Item=Three+Leningrad+Generations%3A+A+Landmark+of+an+Era+by+Luiz+Paracampo

Regards
LP

a new Picture to see cвmera rangefinder (from Klub Dalnomer)


http://www.ussrphoto.com/UserContent/2522015_leningrad c1.png

Operational Principle.
To understand the operation is a need for a perfect repair.
the following figure shows the image formation on the Leningrad rangedinder



http://www.ussrphoto.com/UserContent/2522015_leningrad rf 15.png

At the internal curved surface one can see the limiting frames
Contrary to most ragefinders the central image is fixed while the surrounding one moves according to the lens position (focus)




http://www.ussrphoto.com/UserContent/2522015_leningrad rf 7.png

book Boris Evgenii Graule
"Tips for Fotoamateur" 1958

http://www.t-library.net/read.php?id=894&file=882&page=



http://www.ussrphoto.com/UserContent/2522015_leningrad rf 14.png