Yoshizen's Blog

Pla (B) Lens

Pla Lens (A) was somewhat a kind of flop in my try. —– Then, Zen wouldn’t give up. ๐Ÿ˜€ 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. ๐Ÿ˜€

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Pla Lens

Sorry to be too casual — Pla was a shorten of Plastic magnifier. I don’t remember how and when I got it. As I was looking for a lens which is large enough to accommodate a lens of one-time use camera kind, I just found it on a corner of my desk.

Pla on NZ7

Yet another fuzzy photo was a result of the newly created homemade lens, out of plastic magnifier and a one-time use camera. —– I have tested 1/2 lens, 1/4 lens kind though, they were the lens combined the out side of each other. = So, how about to try “Concentric two lenses” !

Godo on NZ7

(Incidentally, this photo was taken by a bit more ordinary (?) lens = Godo Lens.) —– You might say, when one lens can produce the image like this, why do we need yet another lens ?

The situation was more complicated = TO accommodate the other lens in concentric mean, I need to put another lens in the centre of a lens = It’s need to curve a hole in the centre. —– So, I improvised some tools to make a mini bench drill.

I just carried out the work = 10mm hole was drilled on the centre of Pla lens and a one-time use camera lens was inserted into the hole. Then the lens all together was mounted to the camera. It was mounted to the depth where one-time lens can make the focus = but too short to the Pla lens = hence, the resulting image was like the photo right.

(Ring shaped Bokeh was made by the Pla lens’s so-called “Ring Bokeh” caused by too out of focus lens. — it’s mean, even the “Bokeh lens” has to have about near focal length = out of focus may makes nice bokeh, but “too” out of focus may be too bad. ๐Ÿ˜€ )

So, this image was the worst among my homemade lenses ! ๐Ÿ˜€

A night sky —– anyway, we may not need much of details.

So, how about this ?

M m m m. —– It may need some improvement (I need to find the lens which can make softer Bokeh ! ) still, I like their paintary effects.

I can’t resist loving the image like this.

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Godo Lens

The reason, why the sky was dull = not because the Godo lens but the sky was dull.

My friend / Cinematographer Gordon was clearing up his etc — and gave those junk to me. I don’t know how the man neither geek or otaku, managed to disassemble those, even without having tools — I didn’t ask.

What so ever the history or origin, the lens is a lens = only a matter for me IS whether it is “Usable”. —– Another day, a man offered me a very expensive industrial projection lens = more than 20cm diameter and 5kg heavy solid glass. I can guess, when it was made and sold, it must have 10 thousands pound price though —– ? what can I do with this ? —– once before, the line or graphics of the big industrial design was transeferred onto the iron material by optical projection, but now the digital technology and the laser took the work role. So, some of those old staffs may not stand even for a door stopper now.

If it was a converging lens, placing the lens on front of the camera (I mean, SLR body without a lens) and see the image. === in most of the case, the lens would show the good image only in the centre = in certain taste, the fuzzy surroundings may give a soft good atmosphere though may not necessary always.

Then give more test while stuck the lens on front of the focusing helicoid etc and try combine with other lens and so on etc for all sorts = and hundred of test click.

Since I got number of fuzzy lenses already, this time I picked one lens which has rather even image field (photo above) but as the angle of view was rather narrow, I added a diversing lens to widen its image field. ( You might be amazed to see, that the lens game can be played in such a casual manner — Yes, the game was not reserved only for Newton or Gauss kind of people)

Resulting lens was somewhat like this. = a bit strange lens. Never has any defined focus, nowhere is sharp nor anywhere is very blur.

So, makes your day always somewhat dull. ๐Ÿ˜€

This softness is more like a stocking over the lens. = the image looks like a reduced resolution image / Toy CCTV, otherwise the picture looks normal picture.

When the light doesn’t go where supporsed be, we call it aberration. But, in this case, not enough number of the light reaching and occupied each point, as a resolution. If this was the case, where the missing light has gone ? Is this an insoluble paradox isn’t it ? ? ? ๐Ÿ˜€

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F and M — Cats story ?

They are the photos from the Fortnum and Mason’s X’mas decorations taken by a homemade “Fragmented Lens” ( few exceptions which got dark surroundings = 110 Pentax 24mm Lens) on Nikon Z7.

I’ve been seeing this gentleman always on this doorside every X’mas time (except last year) = he is the another fixture of the Fortnum and Masons shop for ages.

I’m not knowledgeable enough to tell what breed of the cat they are nor able to tell about those angels —– still, I hope you to have a peaceful merry X’mas. ๐Ÿ˜€

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1/4 lens !

After two attempt of two 1/2 double lens, it would go to even 1/4, naturally. (Anyway, it was only a matter of hacksaw and a glue work. And it was what an Otaku lives for. ๐Ÿ˜€ )

Photo left = Covering the lens with black tape and see the effect = even from a small part of the lens, good enough image would be created. Photo right = so, only 1/4 of the lens to produce the main image and 3/4 lens for the out of focus bokeh.

The plastic lens was mounted to the Sony A7R camera (yet the lens can be attached to the Nikon Z as well.)

So, this homemade lens will produce the image even worse than those W-lens A or B ! ๐Ÿ˜€ —– can you guess how happy I am. Ha Ha Ha ๐Ÿ˜€

So, they are the regular test shot. (This dry rose has been working for me the past 5 years !)

In case, if anyone wanted to see more natural image for a comparison, those are the images from the ordinary (?) 110 Pentax 24mm lens on the Nikon Z.

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Aster aster

In anywhere, the Aster seems to be a flower of the Autumn. There said to be many variety of Aster though (one of them said to reach 2 m tall) to my eyes all the Aster looks identical.

And Aster is one of the most humble flower, almost come down to a weed. = almost, yet she was not common enough to be a weed.

Photo left was taken by W lens-B and right was by 110 Pentax 24 mm lens on Nikon Z7.

So, the same question, why I see the same flower on the same spot every year —– why I don’t see a bit different variety ?

In Japan, this flower was always seen to be a synonym of the pure innocent girl. (now, it must be a rare, or even endangered species = so, the flower receiving even more isolated romantic dream — of a boy)

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W Lens-B

Thanks to the advancement of the technology and the use of the image recognition system etc, alongside the advancement of the optical design x optical plastic = we may find many usable aspherical lens in many devices.

So, I got a plastic lens and I made yet another W lens for my camera. —– using the same idea of 2 cutted half lenses put together.

The effect was more or less the same to W Lens-A but the bokeh is a bit more prominent.

Basically those lenses were designed for omnifocus, yet still a close-up extension ring works well. (omnifocus works only within a limit) ๐Ÿ˜€

Whether you like them or not I don’t care. I’m quite happy with them because, I feel that the image is much closer to what I’m living with. ๐Ÿ˜€

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ZM-2 lens (Second version)

ZM2-DSC_0513

———————- (ZM2 sample photo —– fakeย  stage up)

There wasn’t so much complaint to ZM lens —– still, give a thought or two = even though I said most peculiar, the reality was not peculiar enough, just another mediocre lens.ย 

Before, while experimenting with the lens, I noticed that this lens can produce much more aberration when it was reverse mounted.ย  =ย  So, why not. = I further modified the lens optics made reversed.

The result was, some may say, a lens impossible to use.ย  (Somewhat comparableย  to the Helicoid-B lens which got strong astigmat aberration ) Yet still, this might be what I needed.ย  (What’s wrong ? ) ย  ๐Ÿ˜€ย ย ย  (as you can see from the photos, DOF is extremely shallow, and showing very heavy coma aberration.ย ย  This lens was about 45mm F2 equivalent, fully open, still if well focused, image looks quite sharp.) —– now I need to find the suitable subject.ย  (I hope the subject wouldn’t be frightened and runaway )ย ย ย  ๐Ÿ˜€

ZM2-DSC_0579

Is it peculiar enough ? (just a bit off focus)

ZM2-SC0579

And this is well focused (so far).ย ย  ๐Ÿ˜€

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Screen shot by Soft lens (2)

Mag COPY(1)_DSC0028

I found this pretty image in the net.ย  The original was much sharper, rather normal picture.ย  When I took screen copy using my homemade Mag lens, in order to avoid a moire, I gave a bit of off-focus.ย  It was a character of the Mag Lens, when it was off focused, the image suddenly increases the aberration thus, the image become nice soft picture.

Mag COPY(2)_DSC0024

This image was not as much as off focused like the first picture. (Just enough not to see the screen pixel, hence neither moire)

Mag COPY(3)_DSC0027

Then give a bit more off-focus.ย  —– Isn’t this picture looks more sexy ?ย  (Shame, I was not the photographer to see the lotus flower in the first place)

I think, now you were convinced to appreciate soft image !

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Mug shot (2)

Mug'B(1)-DSC09827

Yet another collection of Mag lens images taken around the Oxford street, London.

Mug'B(2)-DSC09830

Sony A7R’s AWB tend to give brownish adjustment when it has too much blue sky for alien lens.

Mug'B(3)-DSC09832

Mug'B(4)-DSC09831

Strangely this lens is pretty good to create 19thC townscape paintings like image.ย  May be Sony’s brownish AWB was contributing to this tendency too.

Mug'B(5)-DSC09854

Mug'B(6)-DSC09860

Mug'B(7)-A7R

Mug'B(8)-DSC09866

Mug'B(9)-DSC09867

Mub'B(10)-A7R-001

Only a trouble of this Mag lens is, its effect is sometime unpredictable.ย  ๐Ÿ˜€

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