> > Consider it an exercise for supercilious twits. > > Hmmm. No Steve remember, in the days of "dumbing down" accuracy, detail and correctness are scorned upon. The "sound bite" generation is driven by the belief that if you can't understand something without thinking about it then it is BS. All your attempts to bring in wavelength, are just adding to the circles of confusion that surround most people's understandings of optics. Issac Newton - WTF did he know about modern cameras anyway? Lot of mental mast. that bloke - hypercilious twit by today's standards! > Cropping causes issues though... Cropping changes the focal length of the lens ... we all know that. Q
