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Hi All,
Box was made up from white card as described by Barry from ASIGN observatory. I have 8 x 9V bulbs all conected in parallel. The are taken through a W/O Flt 110 and a canon 400d unmod. It has a diffuser perspex disc and shows the colour as shown in the photo below. The levels graph shows the three colours all in different places. I suppose the big difference I noticed when starting to use flats was when applying a threshold to assign my colour points the whole image changes across the board at the same time.
Mark
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