Yoshizen's Blog

Catkins on Alder Tree


Few days ago, I gave a peek to a broken Sony DSLR lens through Canon 5D

and saw it still works as a  200 mm optics.  —– then, I realized, what I saw

was not just a shape of a winter tree.  —– It’s Catkins there already !


With a serious attempt, I took picture of it with 500 mm lens on a tripod.

Yes, in deed it was the Catkins. = Without having any serious cold spell,

London started to have a Spring. —– I wouldn’t say I like cold but,

I believe the nature needs it as a cycle. 

Sony 18-200-A09A3185

The lens I was playing was the one I bought for £10 as a broken junk =

Sony-Minolta’s 18-200 mm Zoom lens, which has been seemingly dropped

and the barrel was broken into pieces. —– Still, amazingly, the main optics

kept its integrity and maintained its function = it can Zoom, and focus,

F-aperture is still working (though, setting only from the body side).

Since the Sony DSLR lens has Flange-back 44.5mm, to focus a bit forward

(in fact, 0.5mm exact) can give an infinity focus on Canon EOS body.

With some test shot, I was pretty impressed with its clever design and the

resilience = It’s a broken lens though, it is still usable as 18 mm to

200 mm lens. (with certain manual improvisation ! )


Lens Tool-590-001

(Photo Left / Edge of the Lens was welded.   Center / Screw mounted Lens.  

Photo Right / Pincer Tool for the Lens mount ring.  This tool

called “Kanime” in Japan was given by the Pentax (Asahi-Kogaku)

—– Code of the tool = AK-1-1-LA means Asahi-Kogaku-1-1-Lens Assembly

when I had an exhibition in their Gallery in Tokyo )

But because it was made using  “Hot stamp” (drop a lens into plastic barrel

then heat seal) it was not expected to be disassembled and it was very hard

to modify and re-use.  —– I’m thinking what to use or making out of it ?

(Use for projection kind may be interesting, as the lens got

more than x11 times Zooming ratio.) 


3 Responses

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  1. drawandshoot said, on February 18, 2014 at 19:18

    How wonderful that you are already seeing catkins, we have several feet of snow still!

    • yoshizen said, on February 18, 2014 at 19:29

      I know, that’s why I put the post with a sort of surprise !
      (Here we are having very strong storm and a lots of rain
      but no frost or snow.)

  2. Helicoid Lens (B) | Yoshizen's Blog said, on February 8, 2018 at 13:54

    […] Lens (B) is a sister of (A).  Both came from the same Sony Zoom lens and I’m using the same size helicoid which I got from […]

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