Hi Robzilla:
I don't have 24-85 so I can't give much comment on that. However, I have
both 28-105 and 28-70 II. Here is my 2cents comments. Personally, the
built of 28-70 seems to be more solid than 28-105. Optic wise, I can't
really tell much of the difference within the 28-70 range (well, I think
28-70 might be abit sharper). On the downside, 28-70 has rotating front
and no USM focus.
Hope this helps,
Gary
----- Original Message -----
> Just a couple of questions about this lens.
> Is it possible to use a Tiffen CP filter reg. or wide angle with the
> retracting lens. The Tiffen CP's do not have lip wider than the lens.
>
> Also, is there any significant difference between versions I and II.
> Canon's web museum shows the II version coming out in less than one year
>
> after first, 15 grams lighter and about 2mm shorter. Besides that
> specifications are about the same.
>
> Is this lens significantly sharper to use as a main lens versus 24-85.
> Of course considering the restricted range. I only speaking about
> optical quality.
>
> Any comments are appreciated.
>
> R o b z i l l a
>
>
>
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