Yoshizen's Blog

Pla (B) Lens

Pla Lens (A) was somewhat a kind of flop in my try. —– Then, Zen wouldn’t give up. 😀 Why not to try with a different lens. Anyway, the luck is in a chance encounter (with a suitable character lens)

A lens I found was a single meniscus glass lens which can make the image like this photo —– of course, this lens could be mounted in the centre of much lager lens though, such large lens tend to have rather longer focal length etc etc. So, I decided to make a hole in the centre of this lens and put other one-time use camera lens in that hole. It took only 5 min’ when I made a hole in that plastic magnifier lens, but this time I had to drill a hole into a hard glass lens. If I push too hard, the glass will chip or worse clack altogether. = slow slowly work took half day.

The one-time use camera lens was pretty small. (I used only front lens ) Which makes the image like this. ( = unlike you expected, the centre lens produce the bokeh, and peripheral lens would creates detailed image. )

So, the concentric double lens was mounted on the camera = AND suprisingly, the image came out was rather normal. = the image was just fuzzy mediocre lens kind. (The size of centre lens was 6mm, Outer lens was 14mm which has 4.4 times larger area = in exposure level, the effect of 6mm lens was too small = negligible) (Yet still, the fuzziness wasn’t too bad even though it was far less than what I expected)

I need to get better subject —– image was somewhat similar to the Godo lens.

The fuzzy lens suite for the flower photo. Nobody complain. 😀

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Fragmented Lens

Note: The photo here was just fuzzy (unsharp) = no overlapping bokeh = since it was made by a single lens

After making 1/2, 1/4 lens cameras, there are many fragmented lenses left behind. Even fragmented — its still functions as an optical lens.

Zennist’s tendency is = No attachment, — yet still, (strangely) go for whole hog. So, why not test those small plastic fragment ?

As (or used to be) an optical lens of one time use camera, it works as a lens, even though it was fragmented to such small fraction.

And a remarkable point of those fun camera lens IS they are very well designed aspherical omuni-focus lens. Therefore, they can capture the image in distence to

close subject such as this without any focusing control. (well, you may say, more or less)

So, for the general use, they do an enough work. What do you ask more (for its less than £10 price). 😀

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Fuji-Fun lens

In the 80s, before this country got money from the North sea oil.  And it was long before the  digital revolution, in fact even before the Walkman not mention any digital sound, the Disposable / One-time use camera was very popular.   Simply the people haven’t got the money to buy proper camera.  Anyway, even with an expensive camera, the use of the camera / film was as such, in one film, it started with Xmas and finished with next Xmas kind.  So that, to buy Disposable camera on each occasion was not such bad idea. 

And local chemist taking care of all those photographic business = sending the film to a lab and giving back the printed pictures to the customer.   Shop people take a film out of those disposable camera and send only the film to the lab = its mean, the left over carcase of those disposable camera filling their bin.   So, I got those discarded camera from their bin, while thinking “One day, I’ll use those plastic lens in somewhere else.” 

The lens to film (sensor) has to be 30 mm, Nikon Z’s frangeback is 16 mm, leaving 14 mm to maneuver.  In order to manage this  14 mm, I used a helicoid extension ring 12~17 mm and M42 to NEX adaptor both from China.  With this helicoid, the lens can give a focus from infinity to 0.3 m close-up.  (Since the lens itself has NEX mount, it can be used on Sony A7R as well.)

fuji-fun lens(3)-001

The most of lens of those disposable camera is just one plastic disc.   Optically they are very well designed aspherical lens and together with its built-in small iris, the camera can give a omnifocus effect.  (In any distance, the picture would be reasonably good on 3×5 print = Basically, this lens can produce pretty good image with its designated small F-aperture.  But to use this lens in such a way has no point for me = If so, why not use the camera as it was intended = as in an original form )

But I’m using this lens without its small iris therefore the out of focus blurred image, together with its halation is masking the decent image.  And instead of having deep depth of field by its small F-aperture, I used a helicoid focus.  On the end, the lens produces rather funny image = they are not sharp but not necessary soft image like an old Zeiss lens or Kodak Vest Pocket Lens.   So, I’m not sure what is the advantage of this lens. —– and I got, yet another 12 more of them !   I’m having rather absurd life.   😀

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