RE: Demise of HSI

[Jason Revell <jason.revell@xxxxxxxxx>]

We use a couple of different IR camera's (and a old IR handheld viewer) but
no digitial equpiment yet mainly due to their price (most of the money we
spend has to go on equpiment and materials for the Conservation of the Art
Works).

We have the small and protable Sony TRV with the nightvision .  Not realy
that great but we needed a video camera anyway so it seamed to make sense.

The main one we use in the studio however is a Grundig 'Videcon' (?) with a
B+W 094 filter on the front.  This is good, we get a reasonable image onto a
TV screen and can focus down to about 1cm, helpful when you are trying to
read a very small signature.  Although I have been unable to get any
definate figures from Grundig (they no longer make this camera) I have been
told it see's upto about 2,000nm maybe a bit more.  It is certainly the
'strongest' IR image I have seen, and works very well for us.

The Old IR vewier is normaly borrowed by myself these day's when taking IR
photo's.  No one seams to realy want to use it when there is a new video
camera they can use instead.  I am OK with this as I quite like the look the
Phosphorus screen.  This also gives a better aproximation for HSI/HIE I have
found than the Sony Video camera.  I think it was made in the mid to late
seventies but still works well.

If anyone want's any more info mail me.

Jason Revell

Chax Wrote :
> Just out of curiosity, what video/digital equipment are you using?
> Thanks,
> Charles
> 
> Jason Revell wrote:
> Remember most HSI film is used in a studio (though not by us on the
> list, but how many of us are there !) and with modern technology we can
> see 
> a stronger IR effect by the use of video/digital equipment which has
> fallen 
> in price dramatically over these last couple of years.  This video
> equipment 
> has several advantages of HSI in the fact you can see the 
> damages/inpaintings/alterations/underdrawings ect. to the artwork that IR 
> show up straight away, no need to process and print the film first.  Also 
> the video/digital equipment can see further into the IR spectrum than HSI 
> giving a 'stronger' image.  I have had some artwork's that have shown 
> nothing under HSI but when viewed with our IR camera you got to see lot's.
> 
*
****
*******
******************************************************
*  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  *
******************************************************