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Re: [OM] Olympus 85-250mm

Subject: Re: [OM] Olympus 85-250mm
From: Mark Dapoz <md@xxxxxxxxxxxx>
Date: Sat, 15 Feb 2003 15:06:34 -0500 (EST)
On Sat, 15 Feb 2003, Tom Scales wrote:

> The weirdest is the 35-70/3.5-4.5.  At 35 it is long, and gets shorter up
> to 50. At 50 it is at its shortest and it gets long again up to 70!
>
> What's up with that.

>From 35mm up to about 50mm both the front and rear groups are moving towards
each other to provide the change in focal length.  From 50mm onward the rear
group needs to continue to move forward, but since the front group is at it's
rearmost position, the whole assembly basically just moves forward.
                                        -mark


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