New Nikon AF-S Series, Plastic Lens Elements?

Most all the newer Nikon "AF-S" series lenses I've handled seem to be very
light. Are the lens elements themselves being manufactured out of plastic,
or just the barrels?
Thanks,
Bill Crocker

Bill Crocker

Re: New Nikon AF-S Series, Plastic Lens Elements?

It might. But then again, it might not. Plastics technology is still
improving, and perhaps even better lenses will be made out of it in the
future. Certainly I wouldn't discount the possibilities out of hand.


William Graham

Re: New Nikon AF-S Series, Plastic Lens Elements?

William Graham writes:
Because quality might suffer.
--
Transpose mxsmanic and gmail to reach me by e-mail.


Mxsmanic

Re: New Nikon AF-S Series, Plastic Lens Elements?

There is nothing inherently wrong with plastic as a lens element.....My
eyeglasses have been made out of plastic for a number of years now. It is
tougher than glass, but not as hard. It is also lighter, so it's easier on
the bridge of my nose. It will mould easier, but so will the cement used
between the elements of a glass lens, so I don't know if this is more of a
problem or not. Long, fast lenses are big and expensive, and if making them
out of plastic brings the price and weight down, then why not?


William Graham

Re: New Nikon AF-S Series, Plastic Lens Elements?

...
They use lighter weight metal or polycarbonate plastic. That stuff is quite
strong.
The elements are glass, glass with aspheric plastic applied, or aspheric
plastic alone. Which they use and where depends on the design and price
point of the lens.
Pure aspheric glass elements are extremely expensive to make. For that
reason, such elements were never used in any quantity. Instead, most
aspheric elements include some form of a plastic design.
Jim


Jim

Re: New Nikon AF-S Series, Plastic Lens Elements?

Not only P&S, when you hear the term "Hybrid Element" than means a plastic lens
glued on a glass one for rigidity, e.g.:
http://www.dpreview.com/news/0608/06080902nikonafsdx18-135lens.asp
Although do not expect a lot of weight savings.


Yuki

Re: New Nikon AF-S Series, Plastic Lens Elements?

...
More likely they are using lighter weight materials for the barrels, and a
higher index of refraction glass that allows more bending with less mass.
This, together with some cleaver design techniques can result in lighter
weights.......


William Graham

Re: New Nikon AF-S Series, Plastic Lens Elements?

"Bill Crocker" <NeedToKnow?@AskMe.com> wrote
Lens elements are glass.
Some low-cost aspheric lenses use plastic elements -
usually found in P&S's.


Nicholas O. Lindan

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