Mailinglist Archives:
Infrared
Panorama
Photo-3D
Tech-3D
Sell-3D
MF3D

Notice
This mailinglist archive is frozen since May 2001, i.e. it will stay online but will not be updated.
<-- Date Index --> <-- Thread Index --> [Author Index]

Re: hoya R72 Filter

  • From: "Willem-Jan Markerink" <w.j.markerink@xxxxx>
  • Subject: Re: hoya R72 Filter
  • Date: Wed, 21 Aug 1996 00:58:00 +0000
On 20 Aug 96 at 19:12, Chris Hulme wrote:

> Hi Everyone,
> 
> Could someone please tell me what the equivalent Wratten number is 
> for the visually opaque hoya R72 filter?
> 
> Thanks in advance,

The Hoya R72 is definately *not* visually opaque. 
It equals a Wratten #89B. Even the much darker 88A can be looked 
through with some effort.
This 89B color is also known as Schott RG695, which is used as normal 
IR filter for both Heliopan, B+W (092) and Rollei.

For a full list & conversion table check my homepage:

http://www.a1.nl/phomepag/markerink/mainpage.htm

 
--
Bye,

       _/      _/       _/_/_/_/_/       _/_/_/_/_/
     _/  _/  _/               _/       _/  _/  _/
     _/  _/ illem    _/     _/ an    _/  _/  _/ arkerink
                     _/_/_/  


The difference 
between men and boys
is the price of their toys

<w.j.markerink@xxxxx>
[note: 'a-one' & 'en-el'!]

------------------------------

Topic No. 13