I suspect it's an economic problem; if I sell a P&S for $75, how much
lens do you think that will buy you?
I think Tamron does a plastic molded to glass thing for their Asph's? I
seem to recall that because Tokina knocks that in one of their brochures..
Albert
Albert:
I'm not aware that there's any resolution limit on plastic lenses that's
terribly different than glass, and the refraction index of plastic would depend
on the type of plastic used. I know that it's much easier to create aspherical
lenses out of plastic than out of glass (because you can just cast plastic more
easily), and even some high-priced and high-quality Big Name lenses have
plastic aspherical elements in them.
My suspicion is that the P&S camera is just cheaply made and of inferior
quality, possibly with plastic lenses with three or fewer elements. If it's a one-
or two-element lens, it's going to have a very difficult time delivering quality
images, regardless of the configuration of the elements. More elements are
typically used to correct more types of image aberrations, which is why a
relatively stable and simple design like the Zuiko 50/1.8 still has several
elements (5 or 6, depending on the design -- the 1.8 went through a number of
formula changes...). Tell her she needs a better camera, and steer her towards the
Holy OM series. ;-)
Garth
< This message was delivered via the Olympus Mailing List >
< For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
< Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >
< This message was delivered via the Olympus Mailing List >
< For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
< Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >
|