Re: [KOML] Filter Dilemma

[Clive Warren <Clive.Warren>]

At 12:42 pm +0000 24/11/99, Brian M. Warshawsky wrote:

>Gang,
>
>I recently had Greg Weber remove my 90mm Omegon inner step ring (the
>rubber stopper method would not work).  It was my understanding that the
>inner ring should now be 49mm.  I am not happy with the way my Cokin 49mm
>adapter fits, and I'm considering the idea of cementing in a 49-52mm step
>adapter, so that the lens would forever use 52mm filter threads.  Has
>anyone done this, and is there some downside I'm not considering?
>
>Also, what is the best "Series_ to..." adapter to get for my 60mm
>Hexanon.  I forgot if the size is Series 6 or Series 7 (7 I think) and I
>didn't know what the closest size in milimeters is.
>
>Thanks for any guidance.
>
>Brian


Brian,

The inner thread on the 90mm is 49mm and I have several lenses which have
been converted to 49mm by removing the internal series filter step ring.  I
also use a Cokin type of filter in "P" size and it fits perfectly.  What
exactly is the problem with your adapter?

The 58mm or 60mm Hexanon usually takes the Series 7 filter which is a 54mm
thread.  A 55mm filter would be very tight in the threads and would
probably be impossible to remove if you did manage to screw it home.  You
can buy
Series 7 to 55mm adapters which should do the trick.

The 135 and 180mm lens take 67mm filters.

By the way, I have a 58mm lens which has a 55mm thread just to confuse the
issue.  It doesn't appear to be a modified Series 7 but no one else has
ever reported their 58mm Hexanon to have a 55mm thread...........

I am putting together a KoniOmega FAQ which will be on the CoCam website at
some point in the near future.

Most of the information above is contained in the KoniOmega browseable
mailing list archive on the CoCam web site.

Hope this helps.


All the best,

             Clive   http://www.cocam.co.uk
                     Photographic Services, Filters and Equipment, Infrared FAQ
                            http://clive.bel-epa.com
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