On 09 May 1998 06:48:06 GMT, chicknpiza@aol.com (Chicknpiza) wrote:

> Why is it that these two Canon lenses, 28mm 1.8 & 2.8, have diffrent element
>designs? Why would Canon do that? I would suppose that it has some thing to
>do with the quality but what are the specifics? Also, the aspherical placement
>in both lenses are not the same, have any ideas why?

Huh???? These (almost...;-) MUST be different optical designs due to their speed differences, and therefore the number of elements, powers,
placement, etc. will be different! Nikon even offers several optical
designs in lenses of the same speed and FL, such as: 28mm f2.8 AI, 28mm f2.8 AIS, 28mm f2.8 E/AF, 28mm f2.8 AF-D - all with different
optical designs...