I just come across an Omega F 10x10 condensor enlarger for a good price and I ne ed to know if there is a cold light head like Aristo that sells one that is not the expensive variable one that sells for $2000.00, the one I am talking about a re the ones that Aristo sells for 4x5's that are for either graded or vc papers, with just one flouresent tube either regular or high intensity. The filter draw in this monster takes a 10x10 filter, the largest I have seen are the 6x6 at B& H, lastly as you can see I did not get a hole lot of info on this enlarger, is t here a web site or location that I can get a parts breakdown ect.. on the Omega F, this model I believe is not made any more. I shoot B&W only in 8x10 now final ly I can make the big prints with all that lovely resolution, thanks , Dan.