Dear Silvergrahm,

Your 'good authority' has ' very bad information'

I will save you a calculation or two....


( Excluding waste etc ) you get 17.58 rolls of 135 - 36 per m2 of parent roll, 26.37 rolls for 24 exp and 19.55 rolls of 120 film per m2.

When I was a photographer I always remember a client who 'grumbled' at the cost of a wedding, it became quite an issue, he would not pay his invoice, he went away and calculated the cost of the film, prints, album etc etc and told my then boss to justify the invoice against the cost of the materials ......my boss spoke to the guy and said he had an accountant, and he got three pieces of paper from him every year, and he estimated the paper cost about 2 pence...it was what was written on the paper that was actually important, since my boss explained he could not do it was why he paid someone else to do it, and do it well....the guy paid his bill...he was entirely co-incidentally an accountant...

I learnt a lesson that day......

Simon ILFORD photo / HARMAN technology Limited :