removing angulon lens elements

External Since: Mar 26, 2005 Posts: 4

I posted last week about an older angulon lens I'd found, and I've gone
to a local camera place to ask advice on the smudge on the lens.

It seems that it might be a streak of oil on the inside of the rear
element, or it might be a deterioration of the coating, or both. It's
right smack across the middle, too, so the lens is less sharp open than
it is stopped down.

It would cost more than the lens might be be worth to have a pro open it
up and buff it out, so I'm thinking I might have a go myself. If I can
fix it, it's a great score, but if I can't there's not too much lost.

I've been able to use a spanner to remove the rear set of elements from
the iris/shutter assembly, but am no closer to getting to the problem
area. Anyone know how to remove the rear elements? the inside of the
barrel on the film side of the lens is threaded, so I'm assuming that
the black metal ring there holds the elements in place. But it's so
darned small. The rear lens itself shows about 11mm across, and the
barrel it sits in is about 16mm. I tried to turn the ring with a small
crutch tip, but no luck.

Am I missing something here?

Any help greatly appreciated - Thanks - Chris

External Since: Jul 01, 2004 Posts: 1173

"starburst" <chills RemoveThis @deathtospammers.utexas.edu> wrote in
message news:d2mvh3$t41$1@geraldo.cc.utexas.edu...
>I posted last week about an older angulon lens I'd found,
>and I've gone to a local camera place to ask advice on the
>smudge on the lens.
>
> It seems that it might be a streak of oil on the inside of
> the rear element, or it might be a deterioration of the
> coating, or both. It's right smack across the middle, too,
> so the lens is less sharp open than it is stopped down.
>
> It would cost more than the lens might be be worth to have
> a pro open it up and buff it out, so I'm thinking I might
> have a go myself. If I can fix it, it's a great score, but
> if I can't there's not too much lost.
>
> I've been able to use a spanner to remove the rear set of
> elements from the iris/shutter assembly, but am no closer
> to getting to the problem area. Anyone know how to remove
> the rear elements? the inside of the barrel on the film
> side of the lens is threaded, so I'm assuming that the
> black metal ring there holds the elements in place. But
> it's so darned small. The rear lens itself shows about
> 11mm across, and the barrel it sits in is about 16mm. I
> tried to turn the ring with a small crutch tip, but no
> luck.
>
> Am I missing something here?
>
> Any help greatly appreciated - Thanks - Chris

The Super Angulon has two components. One is the front
element, a large negative lens, in some versions this is a
cemented doublet. The other component is the inside one
which consists of two or three cemented elements depending
on the version. by removing the front element, which you
have evidently been able to do, you should be able to reach
all of the air surfaces of the lens.
Is the problem that you can't remove the cell from the
shutter? If so, it might be just very tight or it may have
been cross-threaded. A compression type wrench (sometimes
called a lens wrench) will help to remove the cell but if it
takes a lot of force something is wrong.
What kind of shutter is the lens in and what version of
lens is it. The speed and focal length will give a good hint
about the version.
Older SA's at least, the front element can be removed by
unscrewing a slotted retaining ring. If you are going to do
this I suggest using either a friction tool or making a
spanner especially for the lens rather than attempting to
use an adjustable one.

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Richard Knoppow
Los Angeles, CA, USA
dickburk RemoveThis @ix.netcom.com