> it's not misinformation, that is why Brian has probably chosen to avoid > digital small frame format cameras. Exactly. An rally driver might never have driven a dumper truck: he can still make an assesment that they are inappropriate for rally driving ... > One requires no ownership to discuss lens physics, only a working knowledge > of the maths involved. That was how academia worked traditionally. Sadly with optics while the basic maths is straightforward, it's still maths. Bob "You can't reason someone out of a position they didn't first reason themselves in to" __________________________________________________________________________ Freeserve AnyTime - Go online whenever you want for just £6.99 a month for your first 3 months, that's HALF PRICE! And then it's just £13.99 a month after that. For more information visit http://www.freeserve.com/time/ or call free on 0800 970 8890