At 03:21 PM 2001.07.03 -0700, you wrote:
>What is the difference between the old 300/2.8 IS and the new one,
>
>1) optics?
>2) construction
>3) weight
>4) material used
>
>
>how can you tell them apart?
>
>
>
>
>Appreciate all the info
>
>
>
Having traded my non-IS for the IS unit,
The new one has a big IS logo on the end of the lens cover
The optics are slightly different in that there are the added IS elements,
popular photo tested it in '99 and called the IS version the sharpest 300
f2.8 ever
The IS unit is made from magnesium and is feels about a pound lighter
The IS unit has a removable tripod shoe (which is nice if you are hand
holding it, and cut weight
The new lens takes a filter adapter that uses 52mm screw in filters which
you can actually buy, compared to the older unit that took 48mm filters and
no one appears to make any more.
(the old holder does fit the new lens but is slightly loose, never tried
the new holder in the old lens before I sold it.)
The IS lens has 4 buttons at the front for features such as IS control,
focus mode selection etc. when used with a 1v or 3 body.
The IS lens can be focused manually without power being turned on or even
connected to a body (and with an eye-piece adapter, makes one hell of nice
spotting 'scope)
Edward Agnew, P.Eng., VA3 EGA
Agnew Technologies Inc.
Electronic Engineering and Stock Photographic Services
Campbellville, Ontario Canada
Voice: 905.659.0429
Fax: 905.659.0474
http://www.agnew-tech.com
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