[rollei_list] Re: Bellows... "Light Seal Tube" ,"Light Seal Ring"
- From: Carlos Manuel Freaza <cmfreaza@xxxxxxxxxxxx>
- To: rollei_list@xxxxxxxxxxxxx
- Date: Sun, 21 Aug 2005 19:35:01 +0000 (GMT)
"Light Seal Tube" and "Light Seal Ring" are the
official Rollei names for these pieces,
"Dichtungsstuzen" and "Dichtungsring" in German.The
ring is the same piece for the 3.5 cameras including
Rolleicords till the 3.5E2, the ring changes for the
3.5F and 3.5E3(the same for both cameras), also
changes for the 2.8F and and 2.8E3(the same for both
cameras).
The "Light Seal Tube" is used for the 2.8C, 2.8D 2.8E
and 2.8E2 (I don't know about the 2.8A and B). It is
the same piece for the 2.8E and 2.8E2 and I guess it
is also the same piece for the C and D.
I have recovered this morning an official Rollei
factory source and I have the catalog numbers if
necessary.-
All the best
Carlos
--- J Patric Dahlén <jenspatricdahlen@xxxxxxxxxxx>
escribió:
> It's not a membrane or a diaphragm. It's just a 3 x
> 102 mm strip of velvet
> felt, just like the light trap in sheet film
> holders. It's glued in a slot
> sround the lens hole in the camera body. If it looks
> like it moves, it's
> just the fibers bowing when the lens tube moves.
>
> The ring Prochnow talks about, that "looks different
> according each
> calculation" could be the lens tube. The velvet felt
> is just a light trap,
> and can't do anything to improve the results other
> than avoiding light
> leaks.
>
> I got a new lens tube in one of my Rolleis I sent
> for repair. Don't know why
> it was replaced (the old one looked good in my
> eyes), but the repairman
> didn't charge me anything extra for that.
>
> /Patric
>
>
> >From: Carlos Manuel Freaza <cmfreaza@xxxxxxxxxxxx>
>
> >Yes Richard, I have seen again the Rolleicord IV
> and
> >really it has a membrane or diaphragm that appears
> >when you put the focus mechanism at the minimum
> >focusing distance, it has a reddish color and it's
> >very different regarding the system for the 2.8C,
> >while the 2.8C is similar to your 2.8E, (it moves
> >following the lens movement as Todd explained),
> the
> >Rolleicord IV membrane or diaphragm(there are no
> >"bellows" here) is invisible till you advance the
> >lens to the minimum focusing distance (0.80m), that
> >was the reason I did not see it before. As Prochnow
> >wrote, the diaphragm, (or short "bellows" or
> membrane
> >or whatever) looks different according each
> >"calculation".
> >The Rollei TLR cameras anti-reflection system are
> very
> >effective according my experience; of course, as
> you
> >wrote, it is not perfect if you shoot into the sun,
> >but for this case it sometimes helps to obtain a
> bit
> >of flare control enough for some detail in the
> photo.
> >Perhaps that issue about the roller reflection seen
> in
> >some cameras has something to do with problems for
> >this "diaphragm".-
> >
> >All the best
> >Carlos
>
>
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