On 27 Jan 2001, at 14:47, Shel Belinkoff wrote:
> Does anyone
> who might know something about the use of of plastic lenses or
> plastic lens elements care to comment on their long term
> durability and optical performance? Will they hold up for forty
> or fifty years like our beloved Takumars and other, older lenses
> that were not built to a price point? Will the plastic
> deteriorate and affect optical performance? How will exposure
> to heat and cold effect such lenses? Doesn't plastic expand and
> contract at a different rate than glass?
Not very confidence inspiring to learn this, I guess you get what you pay for
ala Leica ASPH glass, however I would like to know which of the lenses that
I currently own have the un-publicised polymer/glass aspheric elements :-(
Cheers,
Rob Studdert
HURSTVILLE AUSTRALIA
Tel +61-2-9554-4110
Fax +61-2-9554-9259
UTC(GMT) +10 Hours
[EMAIL PROTECTED]
http://www.ozemail.com.au/~distudio/publications.html
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