Hmm. I can't make heads or tails of this advice. There are 3 primary variables when printing: distance (how high the enlarger is from the paper), fstop of the lens, and time. Considering that the distance is pretty well set depending on magnification and croping, then you must be adjusting the lens to get 2mins all the time. Since they are relatively interchangeable (ignoring poor lense quality in extreme wide-open / stopped-down states) is there a reason you prefer changing your fstop rather than your time?
Originally Posted by Dave Starr
Or do you adapt with the secondary variables: paper speed, contrast, exposure (film density) etc?
Is there something I'm missing?