Re: Kodak HIE and Xtol?

["Willem-Jan Markerink" <w.j.markerink@xxxxx>]

On  5 Jun 97 at 17:02, Jaap Los wrote:

> I'm using my old Nikkormat EL camera together with some 6 various Nikkor
> fixed focal lenses. Moreover I have two filters for IR: B+W092 (=Kodak
> 89B) and a Cokin 003 red filter (is this equal to Kodak 25 filter??). I

Yep, see the IR/UV filter overview on my homepage!

> have discovered, that both filters produce an excellent IR effect. I
> cannot see any difference in my negatives between these two filters. (Is
> there any experience of this by other list members? ) 

I feel that the difference between #25 and #89B is more pronounced
with Ilford/Agfa and Konica (in order of importance) than with HIE.
To get a feeling for the difference: #25 has its 0% and 50% 
transmission mark on 580nm and 600nm respectively, #89B on 680nm and 
720nm respectively. Note that the foliage effect *starts* at 695nm, 
but by no means you are near the limit of HIE, as that would take 
another 200nm at least. Your eye can see a little over 725nm, beyond 
that you record only invisible 'colors'. Darker filters like #87C do 
make a significant difference, although it depends on your subject. 
In snow the difference is less than with foliage, but still visible.






> Therefore I have
> decided to use the Cokin filter. The advantage is, that I can look
> through the viewfinder of my reflexcamera. I give you all this
> information, because you cannot see this to be separate from the process
> of development of HIE.
 
 

- -- 
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'!]
*
****
*******
******************************************************
*  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  *
******************************************************

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