Heliopan IR Filters (was: Hoya RM-100)

[Todd Martin <todd@xxxxxxxxxxx>]

Does anybody have experience with Heliopan's IR filters?

My Heliopan catalog list 11 IR pass filters:
RG 610, RG 630, RG 645, RG 665, RG 695 (89B), RG 715 (88A),
RG 9, RG 780 (87), RG 830 (87C), RG 850, & RG 1000

I suppose the first 6 are different "deepness" red filters.

The transmission curve on the RG 1000 is interesting. It is very "flat"
compared to most IR-pass filters. At 900 nm transmission is about 10% and
50% at 1000 nm. The graph ends there, but I assume the transmission curve
continues upward towards 1.1 - 1.2 microns.

I would be happy to send a scan of their IR filters page (off list) to
anyone who is interested. I don't suppose Heliopan would mind 8-)

~Todd


*
****
*******
******************************************************
*  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  *
******************************************************