I am moving into a new house and will be claiming a part of the basement for a dark room. I need to know how much space I will need for a home made enlarger that could handle 8 X 10 negatives. The problem I face is that I will need to stake out a claim for the necessary space early and defend it against all competing uses (wife, child). I would like to be able to make prints up to 16 by 20 comfortably and perhaps occasionally prints up to 24 x 30. I have been promised (but do not yet have) a 360mm enlarger lens and I can mount it on an 8 X 10 Toyo attached to an appropriate light source and negative holder neither of which have yet been designed. Thanks in advance. HCM I was hoping someone would be able to point me towards appropriate formulae for calculating the distance I will need between the negative and the paper.