Very nice. If you're lucky you may find that it shares filter ring
rubber with another lens and maybe JH has or can get a replacement.
Looks like you're going to have to do a good job of filter ring repair
in order to get at that haze problem.
Chuck Norcutt
Paul Yates wrote:
> It has arrived!
>
> Based on my preliminary analysis and measurements, I can confirm with
> nearly 100% certainty that this lens is a prototype based on the design
> in the patent discussed earlier. In the patent, it states a filter size
> of "about 55mm". This lens has a 55mm filter diameter, which is simply
> one more piece of supporting evidence on top of what I discussed earlier.
>
> -----------------------------------------------------------------------
> Specifications:
>
> Lens name: Zuiko MC AUTO-ZOOM 1:4 f=24-40mm
> Lens type: Two-touch wide-normal-zoom design
> Focal length: 24-40mm
> Max. aperture: f4
> Lens construction: 11 elements in 8 groups, Multi-coated
> Picture angle: 84 degrees (f=24mm) – 57.4 (f=40mm)
> Diaphragm: 6 blades, automatic, full aperture metering
> Aperture scale: f/4 – f/22
> Distance scale : Graduated in meters and feet from 0.6m to infinity
> (oo)
> Focusing: Rotating helicoid system, by turning the focusing ring
> Zooming: Rotating control via separate zooming ring
> Filter size : 55mm (screw in type)
> Lens hood: unknown
> Weight: 410g
> Min. length: 66mm (at 40mm setting, infinity)
> Max. length: 82mm (at 24mm setting, close focus)
> Max. diameter : 65mm
> ----------------------------------------------------------------------------
>
> Notes on condition:
>
> - Good overall cosmetics, with the exception of the filter ring dent,
> slight cracking of the zoom ring rubber and some other signs of light
> use and age.
>
> - Aperture stops are crisp and the blades are clean, oil-free and snappy.
>
> - Zoom ring is stiff(ish), but smooth. Not difficult to turn but
> certainly stays put.
>
> - Focus ring is smooth and well-damped. Not to loose or too tight
> (typical Zuiko) but towards the tight side.
>
> - Mount shows a bit of wear.
>
> - Exposed front and rear element surfaces are clean, scratch-free and
> the coatings look in perfect condition.
>
> - The inner 2 or 3 elements of the first group have significant haze
> (significant enough to reduce contast quite heavily in photos).
>
> - The mid and rear groups look pretty clear.
> ------------------------------------------------------------------------------
>
> Overall I am very pleased. The filter ring dent can be easily fixed and
> I am pretty sure I can go in through the front and clean up the haze in
> the first few elements. I have done this sort of thing before.
>
> Here are some photos I took of the lens this morning. I've taken a
> variety so you can all get an idea of the size of this lens.
>
> http://www.cogitech.ca/photos/Zuiko_24_40/img_1649.jpg
>
> http://www.cogitech.ca/photos/Zuiko_24_40/img_1653.jpg
>
> http://www.cogitech.ca/photos/Zuiko_24_40/img_1655.jpg
>
> http://www.cogitech.ca/photos/Zuiko_24_40/img_1658.jpg
>
> http://www.cogitech.ca/photos/Zuiko_24_40/img_1659.jpg
>
> http://www.cogitech.ca/photos/Zuiko_24_40/img_1661.jpg
>
> http://www.cogitech.ca/photos/Zuiko_24_40/img_1662.jpg
>
> http://www.cogitech.ca/photos/Zuiko_24_40/img_1663.jpg
>
> http://www.cogitech.ca/photos/Zuiko_24_40/img_1665.jpg
>
> http://www.cogitech.ca/photos/Zuiko_24_40/img_1667.jpg
>
> http://www.cogitech.ca/photos/Zuiko_24_40/img_1671.jpg
>
> These are straight from RAW using BibblePro only.
>
> Anyone who wants a RAW for proof that I didn't sit and waste dozens of
> hours faking these photos will need to e-mail me and I'll send a link to
> download the RAW. I share bandwidth with other people, so I am not about
> to post the link here to a 12MB RAW file. Hope you understand. Just
> e-mail me and I'll happily send the link. If I see bandwidth getting out
> of hand, I'll have to remove the RAW.
>
> ==============================================
> List usage info: http://www.zuikoholic.com
> List nannies: olympusadmin@xxxxxxxxxx
> ==============================================
>
>
>
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List usage info: http://www.zuikoholic.com
List nannies: olympusadmin@xxxxxxxxxx
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