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BG Eyepiece Filter for Peak Enlarging Focusers
...For very critical black and white printing, the BG filter is used to closely match the spectrum of light used to focus the image to the spectral sensitivity of the photographic paper...
Our price: CA$38.50
Peak Enlarging Focuser Model I / Focus Scope
...For critical BW work, a BG filter is included to match the visible light for focusing to the spectral sensitivity of the paper...
Our price: CA$540.00
FXD (X-Ray) Filter Set for Thomas Duplex Safelights
...Note: Since medical and industrial X-ray materials vary over an exceptionally wide range of sensitivity and spectral response, preliminary tests should be made with each material being used...
Our price: CA$90.00
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