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Re: BTRF
- From: "Willem-Jan Markerink" <w.j.markerink@xxxxx>
- Subject: Re: BTRF
- Date: Wed, 13 Aug 1997 23:48:27 +0000
On 13 Aug 97 at 17:40, pbadcock@xxxxxxxxxxxxxxx wrote:
> Hi Willem,
> I am interested in buying a few of the polyester foil 0.4mm IR
> filters(#87C). I have an F801s like Jaap, so the dimensions of 24.0x0.4x??mm
> would suit my camera. I currently use a #89B in front of my lens and you said
> you were researching about a #89B BTRF at the moment. Is this a glass or
> polyester type you are looking into?
The #89B will be very thin (but rather flexible) resin, but a quality
which can't be cut with scissors, so I have to have it cut on either
a laser or water cutting device. Only for this one this very exact
size of 24.0mm crucial, the other mentioned filters can be cut
yourself.
> Is the material for the 0.4mm polyester foil #87C BTRF commonly available, or do
> I buy some through you??
0.4mm #87C is in stock, not available elsewhere other than in very
large & expensive sheets (industrial stuff).
I prefer cutting a slightly larger size though, so that you can cut
it yourself. Can cut with scissors normally, but the exact 24.0mm
have to be done with a sharp knife and a metal cutting guide.
You could cut a flash filter from the remains, or for some other purpose.
But for US$2 pro square cm I could cut it exactly I suppose,
otherwise US$1.
- --
Bye,
Willem-Jan Markerink
The desire to understand
is sometimes far less intelligent than
the inability to understand
<w.j.markerink@xxxxx>
[note: 'a-one' & 'en-el'!]
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