Better to slide one of the large-sized Multigrade filters on top of the condensers (or other handy place, after the heat-filter but before the neg) maybe? The underlens-filter set use a more rigid material and seem to have a less delicate surface than the tray filters.
I'm using the underlens filters even for a diffusion head now, but only with an MF enlarger and a 90mm lens. In the past, with a De Vere 504 I have used the colour filtration in the head to get round the sheet-filter problem.
EDIT: Then I realised that there is probably no separate, easily accessible area under a cold-light head and above the neg-carrier on a D2. Presumably the bulb is one that gives a sufficient spectrum of light for the filters to do their job so it would be handy to have a way to do it without having to lift the head off every time. Could a self-made drawer be added to the tube that would usually have the condensers inside? - And then use the larger size of Multigrade filters, cut to fit.
Last edited by MartinP; 12-13-2012 at 05:43 PM. Click to view previous post history.