On 7/23/06, Richard Knoppow <dickburk@xxxxxxxxxxxxx> wrote:
----- Original Message ----- From: "steven woody" <narkewoody@xxxxxxxxx> To: <rollei_list@xxxxxxxxxxxxx> Sent: Saturday, July 22, 2006 8:33 PM Subject: [rollei_list] Re: a little unparallel of lens panel
>> > thank you belcher and Knoppow. i think i have to mostly > agree with > Knoppow's opinions. the problem is, by your help, can i > get contact > with a repair person accessiable to me? i currently live > in Guangdong, > China. > > to belcher, > > i think i can not tell what is front panel and what is > lensboard. they > seem attached together and when go wobbling. > > - > woody > --- > Rollei List > China is a vast country, there MUST be someone competent there. I am not sure if there are other list members in China but for some reason I think there are. The lens board is the part the shutter and viewing lens is mounted on. It is mounted on a Y shaped bracket which is moved back and fourth by a system of cams for focusing. It is not visible from the outside. The brackets are held quite rigidly by guides in the sides of the camera. The front panel is a trim piece that is screwed onto the lensboard. This is the part you see from the outside. Some front panels are a single piece, some are in two peices. The bayonet mounts for the lenses are a part of the front panel. The lens board itself is shimmed to get it exactly parallel on the focus brackets. The front panel has shim washers under the screws that hold it to the lens board. It is relatively thin metal and will bend just a little this way and that. The shims for it are to get the border around it and the body of the camera even. Also, the distance the lens board is from the camera front casting varies just a little with the particular lens. Lens focal lengths are nominal and actual lenses vary a little from this value. So, the clearance of the front panel from the camera body must be enough to allow focusing at infinity without the edges of the panel running into the camera body. This is all simpler than this word description makes it sound. In short, the shims between the lens board and the focus brackets are very important because they keep the lens parallel to the film. The shims for the front panel are important mostly for appearance, although the clearance must be enough. Sometimes one sees a camera where the border around the edges of the front panel are not even. Many people think this means the camera has been dropped or otherwise damaged. In fact, its usually just a missing shim, or the front panel is very slightly twisted. Rolleis are very hard to break in ordinary use.
--- Richard Knoppow Los Angeles, CA, USA dickburk@xxxxxxxxxxxxx
Knoppow, i would thank God if you were live in China :-)
can i deduce from above discussion that, if what i described the wobbling can be seen not only from the front panel but also from the front elements of the two lens, so this is a lens mount uneven problem, not a front panel problem? am i right? actually, i noticed the front elements of the lens moved in a exactly the same way as the front panel.
- woody --- Rollei List
- Post to rollei_list@xxxxxxxxxxxxx
- Online, searchable archives are available at //www.freelists.org/archives/rollei_list
