Dual Band cameras are known as a " Full Spectrum "  ( FS ) conversion and are fitted with a clear internal filter,  I have always insisted on Spectrosil 2000 because of it's high range factor important in making Dual Band images.  Cameras can be purchased converted for Infrared but they are limited to one particular wavelength and not an easy job if at all to change to another wavelength.  FS cameras can be employed for DB and IR Photography but I would say if you want to shoot Vis then stick to your regular camera.  Please be aware there are a lot of Camera Teccies on eBay and it seems to spawn a whole new breed of technician, There is only one camera Teccy I can recommend, that is Ehab Eassa,  this chap is brilliant,  he can take a camera apart and rebuild it without any signs of anything being done and the end results are exactly what you should be looking for,  Ehab also sells various items of kit as well,  find him here.

Full Spectrum v Infrared Conversion.

Cameras converted for Infrared use can only be used on the pre-determined Wavelength of the installed filter inside the camera.  The conversion enables the camera's viewfinder to be used normally.  A Full Spectrum Conversion has the hot mirror inside the camera removed and a clear filter installed in its place.  The Camera can be used with the Viewfinder for Astronomy or Visual work unfiltered i.e. no external filters fitted to the lens.  For Dual Band or Infrared use filters are installed on the lens and for about 80% of the work you will need to use the Cameras Live View function as most if not all Visible light will be obscured.  A Full Spectrum Conversion will give you far more scope than a fixed IR Camera.


Infrared filters are fairly cheap and can usually be had straight off eBay for less than a tenner each with virtually every size you could wish for.

Dual Band filters are not so easy to obtain as firstly they are expensive and time consuming to manufacture,  often having to be ground down from 4mm to 2mm or smaller in thickness from specially manufactured glass.  Various grades and densities are available but because of the costs involved technicians cannot afford to keep every single type and size in stock.  The glass itself is designed to allow light through in the Invisible UV and IR bands and obscure Visible light.  Yes holding up a filter you have forked out over 200.00 for and you cannot even see through seems a bit daunting but that's the way it works.  Having said that some grades of glass will allow Visible light through to colour and image so not all filters are Black and No See Um.


If you are working with reasonable levels of Radiation you should not need a tripod but on dull days or whatever you may wish for that extra stability or unless you want to shoot with an IR 950nm filter.


Before we go any further please let me say if you have a crushing desire to drop your valuable SD or CF card into a beaker full of Kodak X-Tol please do so,  ....... I always edit my Images but some Professionals insist on DEVELOPING them,  well good luck with that one.

I do not use any sophisticated editing software,  Photoshop 7 and Adobe Photoshop Elements 10 suffice for most of my needs,  HDR6 is good for tweaking,  occasional use of Lightroom 3 and that's the lot,  no need to go overboard to edit anything.



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