Graduated Filters

[Michel Dusariez <dusariez@xxxxxxxxx>]

Dear panoramist,

I remember to all of you that I am a retail optician in Brussels, Belgium.

About graduate filters, you have to know that it's very easy to made some
yourself.

In any rx spectacles glass factory, who made glass (mineral and organic -
plastic )  for retail opticians, they made any coloration on organic
eyeglass, they put the plastic glass in some tinting liquid at 90-95
centigrade temperature for a few minutes.

 The tinting powder come in different hues as well neutral gray and is very
inexpensive, you can color a lot of glass in one liter of liquid.

 The coloration is darker as the glass stay more in the liquid.

They made easily graduate by immersing more or less some part of the
plastic sheet.

With some training it is maybe possible to made some central dark spot.

I hope to have give all off you some usefull informations.


Michel DUSARIEZ.

PS : The last edition of the book " 360° PANOPTIC PHOTOGRAPHY EXPERIMENTS"
is nearly all sold, last copies are always available, persons interrested
can ask more info by E-mail.



>Ya, sure, Peter, I use graduated filters on that thing a lot.  And boy, oh
>boy, they have really made a difference; several photos in my new book
>involved the Fuji 617 with 2 or 3 stop ND graduated filters.  I use the
>Tiffen Glass ones; they cost about $125 each a few years ago.  They're
>rectangular, so one can slide them up and down without getting the edge of
>the filter in the frame.  This does limit their use when doing verticals,
>though, because the filter only barely fits inside the "roll bar" and so the
>horizon of dark and light is stuck in the center then.  But hey, it works.
>Some of those verticals need a little cropping anyway.  The nice thing about
>glass is that it's a lot harder to scratch than resin is.  Also, these are a
>nice neutral gray compared to some of the green or amber "grey" that I've
>seen on the market.
>
>Liz Hymans
>
>In a message dated 8/1/00 6:38:13 AM Pacific Daylight Time,
>petermiller@xxxxxxxxxxxxxxx writes:
>
><< I find the need for graduated filters for the Fuji GX 617. >>


Michel DUSARIEZ
UNLIMITED FIELDS RESEARCH PANOPTIC IMAGING
KITE AERIAL PHOTOGRAPHY WORDWIDE ASSOCIATION - FOUNDATION
14, Avenue Capitaine PIRET
B-1150 BRUXELLES - BELGIUM
Fax 32 2 512 68 29