Re: filtration for sfx200

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

On 26 Feb 98 at 18:09, Russ Rosener wrote:

> Does anyone know the Hoya equivalent for the wratten N0. 29 filter?

Sorry, no such thing from Hoya (for filter equivalents check my 
homepage, URL in the footer).

Also note that Joe's recommendation is at least partially biased to
hand held (non-tripod) use....if you can stand increasingly longer
exposure times (read: tripod), then even a #70 (next darker color
above #29) or #89B can be used....but you do end up in the last
fraction of spectral response on film (starting a little below
700nm, whereas SFX ends at 740nm (Konica ends at 840, Kodak at 940).
With wide angles, where longer exposure times are not a big problem, 
nor focus isn't as critical, nor composition with a dark image 
difficult, this would get the most IR-effect out of SFX.

And Hoya does make a #89B equivalent....



 

- -- 
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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