Chuck Norcutt wrote:
> Don't ignore the possibility that the front cell with filter threads
> might be shared with another lens. JH could possibly have the part or a
> junker might be obtained which has a good front cell.....
>
The obvious first place to look is the 35-70/3.6. These two lenses are
VERY near twins in appearance and external construction. I find it hard
to believe that the 24-40 isn't a riff on the 35-70 optical formula
using many of the same mechanical parts.
Paul Yates wrote:
> .... The clamp-ons are a decent option,
I can't tell from your photos, as they all seem to be taken at the 40mm
zoom setting. But I sort of suspect (from where the '40' is relative to
the index mark and the direction of the other fl markings from it) that
the lens gets longer as you zoom to 24mm. That's how the 35-70 works;
the inner tube, which is barely sticking out at the long end on both
lenses, extends out as the lens zooms wider.
This is the reverse of almost all zooms, and Oly took advantage of it in
their hood design. The hood is a slip on that clamps onto the outer
ring. Thus the front element moved forward within the hood as it zooms
wider, rather than taking the hood with it.
In this way, the hood actually adjusts to the angle of view of the lens
as it zooms. Assuming your lens works in a similar way, you may be sure
that the original hood would have been a slip on. I would be looking for
a 35-70/3.6 hood, which should fit the wider diameter of the outer ring,
then trimming the length as needed.
I'd first work with a cardboard or stiff paper tube to determine the
correct length. It won't look original or elegant, but should look
pretty decent if cut carefully. The rubber is sturdy enough for the
purpose.
Moose
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