> > For a given focal length and speed, there is an "ideal" number > > of elements to optimize the design. > > I was unaware of that. Is there a list or chart somewhere, or a > discussion about this I could read? > Thanks for pointing that out.
Well, it's not a science, but you dont see 50mms with 10 elements nor 20mm's with 6. Some zooms get up to 15, but it's going to take incredible quality control to get good results with that many elements IMHO. JCO
