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I have a Durst M301 enlarger currently, and when I was messing around with it, I found another knob across the way from where the red filter is. When it's flipped it's got a weird colored filter. This is the head I have
DURST REPRO VISION M301 M 301 COLOR FILTER 70 X 70 mm - eBay (item 320435713884 end time Mar-07-11 16:17:57 PST)
Just wondering if this means I could do color with this.