Oops. Too much thinking about bent filter rings went right to my
fingers. That was obviously meant to be "focusing ring rubber". I did
not have in mind invention of a heretofore unknown camera part.
Chuck Nrocut
Chuck Norcutt wrote:
> 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
>> ==============================================
>>
>>
>>
>
> ==============================================
> List usage info: http://www.zuikoholic.com
> List nannies: olympusadmin@xxxxxxxxxx
> ==============================================
>
>
>
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