Re: B&W 092 (89B) filter question

["Jaap Los" <imagefotografie@xxxxxx>]

Fred,
It seems to me, that the glass is not properly fixed inside the metal ring.
The only possible reason for this is that the expand- factor (for cold
and/or hot conditions) for metal and glass in your filter differs so much
that the glass needs to be fixed a bit loose. However I don't think this is
the reason. It should be a matter of bad manufacturing. I would ask the
supplier to supply a better one!
Greetings,
Jaap Los
The Netherlands

See also my infrared photography homepage at:
http://home.wxs.nl/~losjb/hometest.html
with lots of infrared photographs, some of them lith-printed.

See alo my website
http://home.wxs.nl/~losjb/JBLhomepage.html
for those who are interested in company matters
----- Original Message -----
From: Fred Greenspan <greenspan@xxxxxxxxxxxxx>
To: <infrared@xxxxx>
Sent: Monday, December 18, 2000 8:43 AM
Subject: Re: B&W 092 (89B) filter question


> I just took delivery of B&W 67mm 092 (89B) filter. Is it normal for the
glass
> to be very loose in the metal ring? In other words, the glass is about
1/16th
> inch (1.5 mm) thinner than the track that it sits in, in the metal collar
and
> can move freely between the outer ridges of the collar. It does not fall
out
> of the collar. Thanks!-Fred Greenspan
> *
> ****
> *******
> ******************************************************
> *  To remove yourself from this list, send:          *
> *         UNSUBSCRIBE INFRARED                       *
> *       to                                           *
> *         MAJORDOMO@xxxxx                            *
> *----------------------------------------------------*
> *   For the IR-FAQ, IR-Gallery and heaps of links:   *
> *  http://www.a1.nl/phomepag/markerink/mainpage.htm  *
> ******************************************************
>

*
****
*******
******************************************************
*  To remove yourself from this list, send:          *
*         UNSUBSCRIBE INFRARED                       *
*       to                                           *
*         MAJORDOMO@xxxxx                            *
*----------------------------------------------------*
*   For the IR-FAQ, IR-Gallery and heaps of links:   *
*  http://www.a1.nl/phomepag/markerink/mainpage.htm  *
******************************************************