>> |
Serenar
!m827jEgWi.
>>187490 I actually have no training in optics at all (didn't even do high school physics) so I can't give a real informed opinion.
I guess I'd echo>>187497, but add that it's not that 50mm lenses are easy to make well, but that good lens designs like the Planar (as seen in every modern 50mm lens) makes for good 50mm lenses and above, and is very well researched. The Planar does not really work for wides, and so an inferior design must be used.
The Tessar (4 elements 3 groups) is another design that can produce stellar standard lenses (Leica and Zeiss' slower lenses, the Nikon and Pentax 45mm pancakes). As far as I can infer from lots of reading, you can force this design into any focal length you want, but the design may not be suited for that length (hence why the Leica 50/3.5 Elmar is a vastly superior lens to the 35/3.5 Elmar, even though both are Tessars). However, with newer technology like rare earth glass, you can use old designs for focal lengths they were not suited for, like in the Minox 35 series' excellent 35/2.8 Tessar-type lens.
Or at least that's what I've gleaned from the Internet. Don't quote me on this.
|