Yoshizen's Blog

Omuni-focus Lens

Omni lens(3)-003About a month ago, I talked about Halina camera and its lens. —– A story how I made its lens to use on the Sony A7R camera and showed its sample photos.

Omni lens(2)While checking those homemade lenses, I found that the said Halina lens could, (with an additional diverging lens on front, as its focal length become longer) be used with a thicker Nikon body.  So, I further modified to add a diverging lens and mounted them on a 42M (Pentax screw) to Ai (Nikon) mount adapter. = Here I got Omuni-focus lens for Nikon DSLR. (And this work was somewhat related to the other lens)

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I know, this situation is having a silly contradiction.  Why 47.5 MP Hi-Res camera need such low-Res images ? —– Omuni-focus mean, nowhere having a “Distinctive OUT of FOCUS (Bokhe) image” in the same time, no “Clearly Focused image” either.  = Just rotten images spread from top to bottom. ( More like a pinhole photo ! )   

A_Omni lens(4)-006Yet still, those photos above, both far and close subjects, it is a rather remarkable phenomenon, such a cheap plastic lens can make (a kind of) usable image in any distance, without focusing, without using smaller F-aperture.    (BYW, the last dried rose was taken with an additional close-up ring) = Omuni-focus is not necessary an almighty.)

A_Omni lens(5)-007And those comparison photos were for academic interest.  Left was by this Omuni-focus lens, and the right was in deed, a pinhole photo image !

Now, my point must be clear, not necessary only decent sharp image could be a good photo.  (Though, I’m not implying my fuzzy image here IS a good photo.  😀

Omuni—– May be not a good photo still, I found that those fuzzy images appeal to our deeper psychology. —– I had distant memories in my subconscious, I might have seen this long long time ago —– may be even on my previous life ? ? ? ) 

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Oxford Street, it WAS

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I know, I should have done this week ago.  Nevertheless, here the photos.

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Those window decorations were from Selfridges —– but I wasn’t so much impressed.

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(Strange green colorings in the shadow area was created by the Sony image processor. —– It IS a headache with this camera.)

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So, it WAS a so-called Xmas decoration. (Now there are only Sale, Sale signs)  😀 —– Most of the photos were taken by  the Homemade G9 lens.  (except last one which was by Sony 30mm F3.5 and the camera was Sony A7R)

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NZ Lens

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Before, I’ve made close-up lens out of a front element of the zoom lens.  So, I wanted to make something different from this Nikon zoom lens. (AF-S Nikkor 18~200 G ED)  Conveniently, the front element of this zoom lens extend  = it’s mean I don’t need to look for a focusing helicoid to use with this lens. (It’s already there.)  😀

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The matter of conversion was, to mount the separated front lens unit to a camera body.  There was a possibility to make the lens for Nikon mount. —– but on the end, I found that, unless I could trim off yet another 2.5mm from the lens barrel, it was only useable on Sony E mount.  The photo above was showing how the glue-up connection was made. (Aluminium ring was glued to the lens barrel first, then it was stick to the body mount.) (First plan was to mount the lens unit to a lens reverse adapter for Nikon though, as it couldn’t get an infinity focus, plan was changed to Sony = an adapter to use EOS lens to E-mount was chosen for its matching diameter.)

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So far this lens is the heaviest among my homemade lenses.  Looks a bit strange though, it would give an impression of some kind of professional gear, not a homemade mock-up.  😀

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Photo above are the test shots of this NZ (NZ for Nikon-Zoom) lens.  It looks the most murky, fuzziest image out of my many homemade lenses.  It was not a kind of light scattered halation — much more fundamental = light is not focused to single point (worse than spherical aberration and the image field was curved) —– Mind you, against its focal length (about 100mm) the diameter of this lens is 60mm =  it’s mean, 100mm lens brighter than F-2.  Well, unless it was a few thousand pounds lens, no designer would give any guaranty of the decent quality for such bright lens.—– If I could produce decent sharp image out of this lens, it is a fraud. 

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G9 Snapshot of the town

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Well, they may looks all same.  😀       The shot by a homemade G9 lens on Nikon D850.     A kind of mystery was that D850 recorded this lens as a 50mm F2 lens = it’s more or less correct  (F2.5 was more likely figure though) —– How they found this ? ? ? 

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G9 Lens

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I show you a yet another homemade lens : G9 Lens (with Nikon mount).   As a matter of fact, this lens appeared here before, in the other guise.

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Similar to G10 lens, G9 lens was a front element of the Canon’s G-series compact camera.  Before, the lens was made Nikon mount like an individual Macro lens to use on a bellows.  With an arrival of Nikon D850, I did a remake of the lens, while giving a focusing barrel.  Hopelessly fuzzy image need to work with the best camera which got the finest resolution.  😀

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From the previous Gaudy Lens’ experience, I took a lens barrel from Olympus film camera. (Photo above) And re-mounted the lens, deep inside of the barrel.  On the Nikon mount, this homemade lens can give a focus from infinity to 1/3 close-up.  The lens optical character was almost the same to G10 lens though, G9 has 50mm focal length, instead of 60mm on G10′. (yet makes very little difference)

Sky and Rose

This was the test shot.  The softness on a dry rose wasn’t too bad.  (It’s surprise to see even such fuzzy lens can show quite a small pattern of the tree.)

Only a trouble from D850 was the size of the each photo, 20Mb causing a bit of havoc. (Still, on this blog = they are cut down to only 200Kb or so —– Why use D850 ? ? ?)   

Further shot on G9 + D850 would come soon. 

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G10 Lens Test

This is much awaited G10 lens shot !  (Oh, really ?  Who did wait ?)

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It’s funny to see, are they the graffiti or the cover of the construction site ? (Good idea.)

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I’m not sure whether the subjects were hopeless or just the images ? ? ?   😀 

(You must be convinced that to show the image, fine quality of the lens is not important.)

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Snap the town by Mag lens (3)

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How weird ! ? ? ?  (of the image of Mag lens or my eyes ?) —– I know.   😀

(I’m going to further this with G10 lens etc — some may say, It’s an obsession.) ——– Oh, my my my, it’s snowing.

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Snap the Town by Mag lens (2)

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Some more snap shot by a homemade So-called Mag Lens.

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With your annoyance even more to come.  😀 

PS :  By the way, I’m editing this blog on Toshiba Laptop with W-XP and Google Picasa —– though, when I see the same on iPad, the images looks darker and the color seems more saturated (in other words,”Picture looks more exaggerated”)  They were displayed differently on each device by device but my intention was not so dark.   Murky doesn’t necessary looks gloomy.  😀

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Snap the Town (by Mag Lens)

6Dec by Mag(1)-DSC07676It was nothing to do with Xmas though, I went to a camera shopping.  Alongside, I had my Mag lens, Fun camera lens, Sony A7R with me.  (I made a fun with shop staffs while testing D850.)  On the way back, I did some snap shots of the town-scape.  (All of them were shot by Mag lens except the last one which was by Fun camera lens)  = Have a fun.   😀

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How’s that ?   😀

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Halina Lens

Hong Kong based Chinese Co. who made Halina camera, Hakin was an interesting company.   In fact, Halina itself was an utterly insignificant cheap camera still, they started to make the cameras as early as in the 1950s = started about the same time to many Japanese camera makers.  They all started to make cheap tin-toy cameras.  From there, the Japanese camera industry developed and evolved to the today’s Hi-tech industry. 

In contrast, Halina stayed almost the same position since.— or, they might just stick to the cheap products to sell in the poor country.  —– I would say they were serious people though, they only managed low-tech, or they never wanted more.  (It might be an old Chinese philosophy to know the position !)   (Still, they made TLR (ish) camera, Auto-exposure camera even 8 mm Cine = surprisingly many many cameras.)   It seemed, they try to survive against digital camera (unless the PC / Printer was handy no print to give to the friends ) still, phone camera killed them off.

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For me, it was yet another Toy camera lens still, yet another try.

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In most of the case, so-called Focus free was done by the smaller F-aperture’s Depth of Field.  So, instead to have focus free, I emphasized even stronger blurred image by removing the small F-aperture (iris) (= hole in a plastic = Photo left)  Then, the Lens alone was mounted in the center of a metal panel of the camera mount (photo middle) —– Then, on the camera (Sony A7R) (Photo right)

What the photo looks like with this lens was —–

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(Those photos were from the Dorkbot gathering.)

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(Not the best occasion to test the lens still, the lens could handle the very tricky lighting condition rather well ! —– Other than the big halation, the images were quite normal aren’t they.)

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