Any glazier worth its name can cut and sand the edges of a glass filter.
I had some 6'x6' cut into 4'x4' with success, but...Harrison & Harrison
filters are too thick and can easily shatter or have its sandwiched components
uncemented. I tried with those too...a disaster.
Madrid (Imperial Spain)
Arturo Briones Carcaré wrote :
>Any glazier worth its name can
cut and sand the edges of a glass filter. I >had some 6'x6'
cut into 4'x4' with success, but..."
Solid glass panes, or filters, can more readily be cut with a typical
carbide glass cutter wheel than can the laminated or cemented filters
made of two clear pieces bonded with the color layer in between. That
is because the two pieces of glass are still acting as separate pieces,
i.e. when one can crack while the other may not. That's what adds to the
safety of laminated car windshields, for instance.
To cut such glass, while it is possible to score and break the glass on
both sides in suitable alignment so that it can be sanded to form one
clean edge, it isn't easy or dependable. Better to use a diamond wet saw
and cut through both sides at once. While we of course have the ability
to do that for people, and sometimes do in a pinch, Anders' suggestion
of using Stan Wallace's cut-down service is a good one.
Disclaimer : I have no connection to Stan other than the following: he
has worked for both us and our competition in the past; he is a dealer
of ours (and others).
The Tiffen Company
Hauppauge, NY 11788
Arturo Briones writes :
>Harrison & Harrison filters
are too thick and can easily shatter or have its >sandwiched
components uncemented. I tried with those too...a disaster.
I've seen heavy laminated (sandwiched) safety glass cut this way :
1) Both sides are scored with a glass cutter.
2) The glass is gently snapped, leaving the plastic layer
still intact, holding the two pieces together.
3) Lighter Fluid (benzene) is squirted into the gap,
and ignited. The heat melts the middle plastic layer along that line,
and the two pieces separate cleanly.
4) The edges are sanded, etc.
Disclaimer : DON'T TRY THIS AT HOME...Let a professional
Caveat: This may work with industrial laminated glass, but filters are
probably a lot more delicate.
Marin County, CA
Here is an update regarding my attempts to reduce the size of filters.
Based on Anders
Uhl's recommendation I ended up sending seven (3 Harrison, 4 Tiffen) 6.6
x 6.6 filters to be cut down to 4 x 4 size to Stan Wallace at the Filter
Let me say the work was incredible.
First he found the best part of the filter to cut down, second he coats
the filter edges with a baked on epoxy (Nice).The next step is very cool,
a laser etching of the filter description onto the filter, much easier
to read than the standard black printing. Add a filter pouch and a reasonable
price and you have a great deal.
I highly recommend sending any filters in need of a cut down to Stan.
Thanks Anders and to all CML’ers who responded with advice.
>Based on Anders Uhl's recommendation
I ended up sending seven (3 >Harrison, 4 Tiffen) 6.6 x
6.6 filters to be cut down to 4 x 4 size.
Out of interest... why not cut them down to 4 x 5.65 for 16:9 use?
I rarely shoot anything 16 x 9, currently most of my work is shot 4 x
3 for NTSC television. In hind sight that would probably have been a more
Where were you when I sent my original post? Good idea.
Don't most 4 x 4 filters work for 16 x 9 except on the super wide angle
Hi Ted, thanks for the reply.
I do environmental doco’s and that tends to take me out of town
for long periods, I only caught on to the discussion when everybody seemed
to have signed off already.
Unfortunately you'll hit the edges off a 4x4 filter from 6.8mm and wider
in 16:9. If I were to put a Century wide angle adaptor on an average lens
such as the 7.8 x 22 - Fujinon (6.2mm with adaptor) the 4x4 will be of
no use to me.
Jacques Nortier - Environmental/Wildlife Cameraman,