"J. C. O'Connell" <[EMAIL PROTECTED]> wrote: >> > 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.
The FA*80-200/2.8 has 16 elements (in 13 groups), but it's a truly outstanding lens. -- Mark Roberts Photography and writing www.robertstech.com
