Flower Patch (4) — by 2-Element Homemade Lens (A)

There are two “2-Element Homemade Lens” = both were based on the

(supposedly) same toy camera lens (seems to have 27 mm focal length) but

one was using HOYA short-eyesight specs lens to lengthening the focal 

length, suits for a full-frame Canon 5D.  The other was using a strong concave

lens, came from a discarded zoom’s front element, and I made this for Nikon 

(though, for this test, I’ve used it on 5D with “Nikon to EOS” mount adapter.)  

As the original lens was designed for focus-free, they are the easiest  lens to 

use = unlike Pinhole, at least I could see the finder image, still no need to focus 

= just click, thanks to the camera’s AV mode.   🙂

And the photos in this post were taken by the HOYA-Canon type.

As focus-free, the lens could capture from quite close range to the distant subject

with very reasonable quality with an added “good” softness and the good deal of

halation which makes me smile with fun.  🙂

(though, I haven’t established whether its softness was the toy camera’s inherent character

 or caused by the added lens —– whichever the cause, it wouldn’t spoil my fun.)

And the images made by the toy camera lens (hence, close-up only) was in this post.

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Sweetest Cherry Photo (so far)

Those photos were taken by a lens came from a Tokina Wide-converter and

its converging part of the lens has about 160 mm focal length, I call it Tele-soft.

In fact this lens can have a quite sharp image when an Iris was placed and the

spread of the light was centered — otherwise, its F4 equivalent of optics

produces beautiful soft Bokeh.     As the lens was mounted on a bellows, it is

quite awkward to use still, it can easily make a good close-up image as well.

I hope you appreciated to see them.   

(Honest ?)  🙂

PS : I didn’t use any filter or PS digital manipulation at all

—– only clopped and the brightness was tinkered on Picasa free program.

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Magnolia-2015-(A)

Magnolia here must be a garden variety of Magnolia Kobus, its origin was a Japanese

“Kobushi” (こぶし）which has 6 petals.  But I don’t know the Garden Name.

In this post, the photos were taken by a homemade Lens on Tilting Bellows.

And if it was not fuzzy, it was done by the Canon EF Macro 100 mm F2.8.

I still like those fuzzy images.  🙂 

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Cherry blossoms with ultimate Bokeh !

In this post I experimented the Cherry photo with strongest ever kind of Bokeh.

The lens I used was appeared here before as a Proxer (close-up lens) which was

in fact a front element of a TV zoom lens.   But, in this occasion, lens itself was

used as a photo-taking lens, somewhat 60mm F1.4 lens mounted on front of the

Tilting Macro Bellows (hence, good for a Macro photo as well though, take macro

photo of shaky flower under windy condition was not easy at all.)

—– Yes, they got big Bokeh what I expected though, — it seems, it’s gone too far.  😀

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Play with Lens (2) — Tamron 300mm F5.6

On the previous post, I’ve shown you many samples of the fuzzy, soft-focus images

created by the (mostly) single convex lens.   And I had a belief that the single

convex lens which inherently possessing aberration would produce soft image.

Yet still, what I have tested was the lenses about 50mm focal length —– then I thought,

if I can get longer (= telephoto) soft-focus lens I could take nice photos from distance.

(Pentax had 80mm Soft-focus lens and Canon used to have 135mm Soft lens though

their effect was rather subtle.)

—– So, why not to see it with the front element of a telephoto lens. 

What I tested was old (70s ?) tamron 300 mm F5.6 lens. (Photo above — bottom left was  

the front element and the bottom right was the rear element.

(this rear lens seems to be a 2 element compound lens) 

Photo above is the test shot of the Tamron 300 mm F5.6 (center photo was the part

enlargement of the photo left (full-size) and the right photo was by the Tamron 500 mm

F8 Mirror lens as a comparison) —– 500 mm lens showed much clear image though

this 300 mm lens was not in the original and in good condition. ( — Even worse,

those photos were taken through the dusty double glazed window)  🙂

The question was if this front element alone could show the soft image ?

Photo above, both left and the center were taken while rear element was removed

(= Front lens alone ! )    (This lens could focus down to 1m = 1/3 close-up.)

Well, with or without the rear element which supposed to eliminate

the aberration did not make much of difference. (on this occasion)

= My attempt to make fuzzy telephoto lens was failed so far.  🙂

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Play with Lens

 So far I made quite few lenses to obtain soft-focus or wide-angle pinhole etc,

mostly by utilizing single lens. (still, some of them seemed to be an achromatic

compound lens)  Single lens has inherent aberrations which produces soft image.

Furthermore, I’ve experimented soft images with focus shift or even with camera

shake/vibration using aberration corrected normal lenses. Though, those approaches 

were hardly called technique but more like an opportunist seeking a good luck, since 

the success rate was rather low = lots of try and only few will show the good results. 

That’s because, when the focus ring was rotated while camera’s shutter was open,   

the resulting shake gives devastating effect than a soft nice blur.

= make smooth focus shift while camera was held steadily. = That’s what I need. 

Inside of the Canon G9 compact camera, I found pretty useful mechanism.  

(1) A motor moves the lens.  (2) Small stepping motor shifts a lens for focus.

—– though, those two mechanisms were constructed on the same plastic piece.

(Photo above, left) = I needed to cut and separate its center mechanism out of the

lim with DC motor.  (second photo shows the separated piece = the lim which can

drive a cogged barrel — in the second photo top, the lens was placed in the barrel)  

Photo 3rd and 4th showed the center mechanism — the lens was pushed out most

and pulled inward most by its stepping motor.

The photo above, left is the cogged barrel = when it was rotated by the motor,

the barrel, hence the lens will be extended(= Pushed out) (photo center)  

When motor rotate opposite direction = lens was pulled in. (photo right)

Those function is exactly what I need for a smooth Focus-shift.

 In order to have an experiment to get a soft focus by the focus-shift ( by a normal

lens, not by the aberration) I took the lens unit out of a Canon 50mm FD lens.  

(Photographic equivalent of gouging the eye !)

( a disc shaped mechanism on the right is the Iris — very useful device )

The lens unit which I’ve put inside of the plastic barrel, in the photo before was this

Canon 50mm F1.8 Lens.  —– though, on the test, I found that this Canon 50mm FD

lens can’t give an infinity focus on Canon EOS = only usable closer than few meters.

(otherwise, the EOS’s mirror will hit the lens bottom.  😦  )

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Then, give a thought, what all those hustle for ?

—– Why not just modify a Canon EF 50mm for EOS = 

put an extra electronic connection to override their AF motor !

(Ideally, huck into the Canon camera’s OS and reprogram it to give a focus-shift while

shutter is open = was the best though, not only the risk to destroy the camera but also,

the Canon doesn’t like it at all. ) 

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Lens Test on Cherry and Plum Blossom

Those photos were taken a while ago, the same day I took pictures of Daffodils.

(After this, there must be much better full bloom somewhere else though.  🙂 )

(photo above was taken by a Canon Fisheye lens)

And the following photos were taken by the Two Element Homemade Lens above.

The beauty of this lens was that there is no focus  😀   (Other than this lens,

rest of the lenses were used with the Tilting Macro Bellows for focus.)

And the following photos were taken by a lens originally came from a Canon

compact camera G9 = it was their zoom’s front element.

The lens was Epoxy glued onto a lens mount ring and a filter ring was fixed too.  

Unlike first two photos, those photos were (I think) Plum tree.

Next was a front element of a Zoom lens  (I don’t remember where it’s came from,

Canon or Sigma ?)  — The lens was fixed in a similar way to the other homemade lens.

Front element itself couldn’t eliminate the aberration. —– but this one showed

very strong Coma aberration — (if not a camera shake).  In most of the case,

good softness of the image was created by the Spherical  aberration  

= so, Coma aberration was not desirable here.

Strangely, this Coma aberration appeared somewhat in middle distance.  

And not much so on the close-up.

This one above showed no Coma aberration but the following one did  ? ? ?

I need to have more test.

Last one here came from a cheap Wide-Converter for a compact camera.

It got quite big diameter — hence the effective F-aperture is F1.6 !

 

I like the images from this lens though —– strangely, despite full open F1.6,

the back image was not necessary out of focus or dissolved into big  Bokeh.  

Anyhow, each lens got its own character = pros and cons.  🙂

Last photo above was again by the same Fisheye lens. 

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Daffodil — Lens Test

As the spring has started, I took the lenses (in fact quite few) which I “made” duling 

 the winter hibernation out to the test.  🙂

And those lenses were designed to use with 

 tilting bellows I specially made for Canon 5D.

Photo left, Those three lenses (mounted on the

 Nikon mount adapter) were saved from 

 the broken cameras or lenses.

— Left one came from Canon G9, center one from an old zoom lens and the right one

came from a Wide-adapter and as they are having focal-length about 50mm~60mm

therefore effective F-aperture is about F2 (fully open only ! )   And being used on the

Tilting bellows they are able to give a focus from infinity to more than 1:1 close-up.

(with a bit of difficulty on use.  😀 )

Most of the photos here were taken by the “Center lens” photo before, except

the right photo above, which was taken by the Canon Fisheye lens.

Well, they were just a fraction of test shot —– still, shows some results

which I appreciate a lots.  🙂       ( —– whatever you say.  😀  ) 

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Riot of Flowers (2)

As a post uploaded week ago had a title Riot of Flower (1),

this is the following one (2)   🙂     All the photos I took at the same time, looks

more or less the same, (and so many) I’m not sure whether it has been

uploaded already in different hue and trimming.   😀

—– never mind they are just a lots of flowers.

(On the process to upload here, the file of photos had been cut down from

5~10M to 500K or so, though the program seemed  no good for fuzzy image

= they became awful = so please use your imagination.    😀

(they seemed better and smoother on Android tablet screen.)

(Lens used and the camera was the same as before.) 

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What we see in flower Photo

You may believe that you are seeing the detailed truth of the things before you.

Yet the reality is, that is only your naive hope.   In our eyes, only the center,

about 15~20 degree of vision can see the detail.   — And in fact, on this text, if you 

gaze at a word “seeing” on the first line,  you are not able to read adjoining words

without wobbling the eyes. 

Exactly the same way to fill the gap of blind-spot in our eyes, our vision is

a conveniently  re-constructed mapping of the environment. = Anyhow,

we don’t need to have the detailed vision of everything. = because we knew

if necessary, we can give a close look.

And in reality, we reject the most of the details, otherwise our brain would be

overloaded —– we only need to have “a kind of understanding of [it is there]”

It is a funny belief that the photograph got to be sharp and show the details.

—– even though,  very few people know the significance of the detail of

such as the structure of a flower. —– So, the most of us don’t care !

With the same belief, even a Phone-camera which got mare 2 mm size lens with

2 x 3 mm sensor, still has 10 MP, 15 MP and produce pretty decent sharp image !

 (—– that’s annoying me.  😀  ) 

So, while using  x10 more expensive and x10 heavier camera I’m creating utterly

fuzzy image. —– anyhow, no botanists or any scientific person needs my photo.

Then suddenly appeared photos here, were taken by a proper Macro lens.

Some of the people prefer this kind of “normal” photo.  —– Why ?  

Are they a botanist or an entomologist ? 

Does anybody expect to find something important from this photo ?

—– I don’t think so.   Nothing significant in here.

It seems, it’s not just me, the people got tired of sharp pan-focused image.

So that, even Google Photo, created an app to give “out of focus bokhe”. (by

moving the camera and gives 3D depth info and digitally creates  bokhe !) 

 I think, the sharp pictures are a kind of piecemeal,  make  us to have a false

peace of mind that the nature is still with us.

(even though, the most of us are nothing to do with it ) = Even a man who

never gave a close look to a face of bee, still feel “Yes, this marvelous creature

 is [My Friend]= I’m in the circle” because I’m seeing such close details.     🙂

For me, the images behind the hazy curtain would calm me down more =

I was relieved  from the detailed scanning task and see the world as it is. 

—– or I would say, “Just feel it” = away from an useless thinking.

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