Yoshizen's Blog

Shallow Focus — Pan Focus (with tilting lens)

Some sharp eyed reader quizzed me, the photos of Dandelion seed are odd on previous post.

Very good eyes and the knowledge on photographic image !  —– So, I reveal the trick behind.

There is no such things [Lens Rivers Adapter for Canon EF lens].

But it is just a lens mount ring with a male filter thread on the other end.  That’s all.

If Canon is not selling,  make it ourself.   Why not  😀

Anyone can put two together with glue !   What’s the hands for ?  (not much brain needed ) 😀

But to make it,  I wouldn’t just glue together straight —– I glued them in 40 degree in angle !

(I wanted to make it 45 degree though, it was too much, and caused image-cut off = I had to

compromise though, the photo is using the image to the edge, quality became pretty low )

—– With this tilted lens, Focused field is 80 degree in angle to the camera = much easy to have

a light and able to creates Pan-Focus effect.  (Photo above, Left)

But, when it was tilted to the opposite angle,  focused field is perpendicular to the object, hence

it shows very shallow focus and exaggerated off-the-focus “Boke.  (Photo above, Center)


In fact, I’ve been using this Pan-Focus effect since I created Yoshi-Handy and Conica-Tilt

40 years ago, long before Canon TS lens. (You can see both cameras in an old post = Link here)

unlike this Tilted Revers Ring on 5D,  Conica Tilt gave a Pan-Focus from lens front to infinity.

———————- (Without the Lens lock pin, lens was secured by a crow inside, operated by the top-left round lever)

———————- (Incidentally, the Iris was automatically operated by a solenoid on the moment of shatter release)

To have a pan-focus to infinity in one shot, one side of the lens has to sink into the camera body,

so that, the camera front had to be Huck-sawed,  giving a margin of lens movement.

(See the inside detail in a photo right —– to do this kind of work = to prevent the camera

mechanism jammed by the metal dust, all the mechanism had to be removed

= it’s mean, camera had to be completely disassembled and made it to an empty shell).


With this modification, lens can tilt 30 degree max, and one side of the lens is effectively

extended 18 mm = with such extension  to 15 or 16 mm lens meant, it is effectively

life-size macro !   (As I was an original member of  PCW (Personal Computer World Magazine,

until they were bought up by I.P.C) this tilting lens camera enabled to produce a photo 

“Foreground  is a CPU chip, and background is the computer company’s building, in one shot”)


I’m planning to make yet another lens tilting camera using Canon 5D body (though, I have to

do its hack-saw work without disassembling the camera body   😀  )   May be I Just Do It. 

( It is a Zen in ACTION !   With open-minded way, there is no prohibition.  Only, Do the best  :-))

This is a photo of a Canon EOS Body.   Although this is the Body of EOS RT,  as most of the

camera designer in the same company are using the same layout of  the mechanism, even

using the same frame die-cast,  (since the position of Switch, lens-lock-pin are all same)

it wouldn’t be so different on 5D body.  = to modify the body to tilting-lens body only needs

to remove the metal frame marked between yellow stickers. ( —– in theory.   😀 )



3 Responses

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  1. […] PS:   Good additional reading = [Shallow Focus — Pan-focus] […]

  2. […] need to make yet another Tilting SLR using DSLR body.   […]

  3. Sony Tilt | Yoshizen's Blog said, on June 7, 2017 at 21:08

    […] fact, I planed to make a tilting DSLR device using Canon 5D Mk-II, so that I bought one more Mk-II body to be hacksawed. (and 5D original body for research / […]

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