Yoshizen's Blog

Sony Lens Mystery (2) — After Sony’s answer

Sony2-Test

On the time of the first discovery of the strange phenomenon, inside of a Sony’s 30mm Macro lens, I gave an enquiry to the Sony.   And I got an answer from them which said :

“With reference to your enquiry and after further investigation, we would like to highlight that the Sony lens does not have a special technology used. Therefore, the focus resetting does not have to do with specific technology used inside the lens.

SONY SUPPORT TEAM
http://www.sony.co.uk/support/en

As they didn’t answer why and what for the lens focus move, I check the lens and found that even after more than 10 days, as I haven’t touch the lens (and the lens hasn’t been mounted to the Sony body = battery or super-capacitor if there was any at all inside, must be exhausted) the focus still moves.   So, I further gave them an even harder test, “with 10 mm extension ring”. (photo top)

Z7+30Macro+10mm

On Nikon-Z7, the Sony SEL30m35 lens + 10 mm extension ring made quite a good close-up images and this was the closest I could go. (photo left)   And a bit more distance, lens worked almost on AF mode. (photo middle)  Then — while lens was kept aimed to dark object, I suddenly moved the lens (camera) to bright outside = the lens focus moved to far (photo right) then back  to very close.  M m m ? ? ? —– wait a moment, the LENS got 10 mm extension ring too.    How come the focus to far subject like the photo right here was possible ?    What kind of optics can override the 10 mm extension of the focus by a little movement of the lens ! ? ? ?    It’s incredible. 

Sony+10mm

So, I did test the same on Sony A7R body.   The result was as you can see on those photos.  = With 10 mm extension, the lens can give only very closed images (photo left) and the middle and the right photo.

With a bit of cynical view, this lens SEL30M35 (30mm Macro F3.5) can give more on the Nikon Z (with my special adapter) —– than on the genuine Sony body.   😀     What ever the Sony says, the lens keep move the focus while detecting the own position without power, as if its got own mind.  This must be their special technology used inside of this lens.   So, the mystery was not solved at all.   😀 

(Sony might got quite a confidence to ignore a funny question, even after the Canon and the Nikon came into the full frame mirrorless market, Sony’s share is still over 60%.)

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ZM2 Lens – Spring Walk

First visitor here tonight was from USA, seeking Plum Flower.   So, I’ll show you many Cherry flowers, Plum Flowers.

You may not believe though, all those photos here were taken by just one lens,  (homemade ZM2 lens, on Nikon Z7 camera — ISO 100, AV setting)  Slight difference of the focus, the lens can produce quite different kind of image !

This plant called Japonica Japan was originated from Japan as its name suggests, and a cousin of Quince, or relative of Pear.   Incidentally, a name Nipponia Nippon which meaning is the same (Nippon is the formal name — Japan is a nick name after Marco Paulo) was for national birds Toki who has been nearly extinct and revived to about 150 now.

Ever cute Snow drop, Japanese name is Yukiwari-so (雪割草) which mean the flower who sprout out the snow !

I found this variety of cherry first time in this country.  Still no idea of its name.

And this is somewhat close to the plum. (But not Japanese Ume 梅 —– I don’t know why Ume didn’t come here.)

And this is Daphne —– somewhat related to Cloves though, the story was very complicated = lots of misunderstanding.  (You might have seen a furniture made by a wood called Mahogany but never know what its tree looks like.) 

Same as that, the wood for burning incense Agarwood 沈香 was a mystery to the Japanese for many hundreds of years, and people mistook this plant was related to Cloves 丁字 (hence Japanese misnamed this Daphne as 沈丁花---on both case the letter 丁 represents the shape of nails which is a shape of the Cloves as well and the smell of this flower is the same to the Cloves though) those plants are in fact totally different plant. 

Since Agarwood can be sold for very high price, the tree has been pushed to near extinction = now they are protected and the genuine wood is hard to come by, so that, there said to be a lots of fake in the market. ( = a wood dripped into an artificial incense was sold to the tourists.)

Crocus is a relative of the Saffron.  (So, don’t eat them)

(In fact, Daffodil is also poisonous — if you eat = Who eat ?)

I guess this cherry seems to be originated from Yama-zakura.  — but not sure of its multi-petal flowers.

So, it was a nice walk and shootings.

Those three photos were somewhat an extra.  I met Ms.S and Mr.M as a next door of one of the cherry flower’s place.  They got very fancy bicycle with motor. (And those photos were for them to copy from here)

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Go out with ZM2 Lens (First field test)

It’s a rare bright day.   And the spring is coming.  (Olegon Maple started flowering)

I didn’t know there was a gallery here. (but not open today ?)

ZM2-on12(3C)-DSC_0604

It’s hard to tell whether the aberration of this lens, ZM2 is coma or astigmatism ?  (The camera was Nikon Z7.)   Do you want to see this photo in normal sharp image ? I don’t think so.  This is what this photo should be.

ZM2-on12(4C)-DSC_0631

Is it an image from a dream or nightmare ?   Or, premonition ?

ZM2-on12(6B)-DSC_0621

The difference of those two was just a slight move of focus. (Since the DOF was so shallow, slight move suddenly makes the image collapse. )

ZM2-on12(9B)-DSC_0626

ZM2-on12(11B)-DSC_0639

You might be wondering, how such hopeless lens can still makes decent image in the same time.  (That’s why I said peculiar and I like it very much.)   😀

ZM2-on12(13B)-DSC_0642

Peace to everybody.

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ZM-2 lens (Second version)

ZM2-DSC_0513

———————- (ZM2 sample photo —– fake  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. 

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

The result was, some may say, a lens impossible to use.  (Somewhat comparable  to the Helicoid-B lens which got strong astigmat aberration ) Yet still, this might be what I needed.  (What’s wrong ? )   😀    (as you can see from the photos, DOF is extremely shallow, and showing very heavy coma aberration.   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.  (I hope the subject wouldn’t be frightened and runaway )    😀

ZM2-DSC_0579

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

ZM2-SC0579

And this is well focused (so far).   😀

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Lucky in life = Fate

Somebody asked me, like the time when I modified Leiz Elmarit P lens or ZM lens kind, while using 58mm helicoid ring, how I could manage to find the necessary rings etc in such efficient way ?    My answer was, There was no such good luck to find the component.   It was just work hard to try fix.   Not a good luck or magic finger, just came to a good result thanks to all those effort.  (No wonder)

Yet still, the start was a chance discovery of the 58mm reverse adapter for Nikon-Z mount.   If I need to attach something to a camera, there are two choices,  one is find a cheap adapter ring such as M42 to EOS, M42 to Nikon Ai kind, otherwise use a body cap.   To make something for Nikon-Z, their body cap was hefty £6.   Then I found a 58mm adapter for Nikon-Z about £3 or so.  —– If you may say I was lucky, yes, it was lucky.   Still, I’m puzzled why this adapter was made in the first place, especially for what in mind ?    I’m not sure whether many redundant lens which got 58mm filter size, waiting to be experimented on the newly arrived Nikon-Z camera ? ? ?

What ever, the first piece of jig-saw was placed.   For this 58mm ring, I got an idea to use a 58mm mount helicoid ring.   Then, to mount a lens, I need to find something to join from lens to 58mm helicoid.    Here, there is no inspiration kind but just try next by next among the mountain of rings I got.  (Even the same 52 to 55mm step-up ring, inside diameter of 52 mm screw is not the same = need to test)  To mount the Elmarit lens, it got to be a 49mm filter ring = 49 to 52, 52 to 55, 55 to 58 then to the helicoid.   (Instead to use cheaper 42mm, why 58mm helicoid was, since the Nikon-Z image sensor was too close to the mount, 42mm ring will cut the image corner.)  Those step-up rings adding 3mm each for the distance between lens to the body,  I still needed to put the lens further away from the camera, I used an old Nikon extension ring K-5.    

But, when I did the same to ZM lens, I needed to have less distance to mount the lens. = instead to use 58 to 55, 55 to 52, 52 to 49, 49 to 46mm, I ordered 58 to 46mm ring and waited a mail from China long time.    So, the work rely on the simple but rudimental try. — and waiting game.   No ingenious solution, neither Devine help. (You see, I’m a very good worker = good work and its mind pulls good Karma.)   😀 

The original meaning of the Karma is the rational, natural consequence (such as, the heat makes the water boil) not a paranoid delusion (typically so-called  consequence of previous life (= Hindu idea) — there is no previous life, since no perpetual soul could exist)  = its mean, straight positive effort causes positive consequence (and evil act / idea repercussions) = those rational makes your Fate !   Fate is not a kind of supernatural phenomena.   Heaven is too busy to twist every individual’s life.  Everything occurs just as a simple own cause and a consequence.   Too much thinking tend to make you a hero of victimization though a matter of fact, the world is not bothering you as such you are imagining.  They got their own business.

So, anybody can make a lens.  = You can try.    (But first, you have to find a lens to play with !) 

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ZM lens — the most peculiar lens so far

In fact this was not the first time this lens appeared here.   Before, the lens got different guise and used with awkward tilting bellows.   Yet still, using the same approach like the Leiz Elmarit P lens, I wanted to give a new lease of life to this one.

Same as that Elmarit projection lens, the construction was done by just put together readily available component from the Net (except only one glue pont).  (Helicoid ring got 25~55mm extension and able to make 25cm close up for x0.7 image.  Focal length was about 45mm and F2)

As I wrote before, the origin of this lens was not known — probably the front element of a zoom lens.   Under the certain handling, the lens can give pretty good image.

So, it is a sharp detailed image ———  (so far)   😀

ZM(x5)-Z-Feb- folder

However, with a bit different focus, suddenly the lens makes totally different kind of image.   (You may not believe its the same lens) = as you can see the photo right, the depth of field was very shallow and the bokeh (+ halation) is amazingly strong.

Lens seemed to have 2 element still no apparent aberration exists. —– but I can not guess why the lens can make such prominent bokeh where it was not in focus. ( fore-focus seemed to make coma like aberration = So, to make a focus on the edge, the image with bokeh appeared —– as long as it was in the focus, the image is sharp, though, once it was out of focus, suddenly the image became very blurred.)

How strange ? ? ?

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Sony lens Mystery ? ? ? (Focus moves without power)

Sony FE lens for E-mount has 18mm frangeback and Nikon-Z camera was designed to have the distance from the mount to image sensor 16mm = in the traditional sence, this 2mm gap can easily be overcome by the focus adjustment (infinity may come with a bit of rotation) by extend the focus 2mm more.   Yet, I do know the Sony lens was fixed to the minimum F-aperture and there is no manual focus ( = so-called focus by wire) when it was not connected to the Sony camera. = no point for attempt to use the lens anywhere else.

Though, as I made a lens mount adapter NEX (Sony E) to Nik-Z, I needed to find where the exact top point of the ring, before the Nik-Z mount ring and the bayonet part of the Sony lens cap was fixed.   Then I discovered very strange phenomenon of the Sony lens’ behavior.  

(The shape of internal shade appeared on the image = it never happen when the lens was used on the Sony body — in any distance, in any F-aperture = seemingly it is only to destruct the experiment.    The truth was that this lens SEL30M35  was for APS-C cropped size = not for the full frame = black frame shows the size of APS-C image and the image on the A7R finder was in fact digitally enlarged 50mm equivalent image. )

At first sight, the lens seems to be frozen at the closest focus position  —– In that case, I should click the camera (Nik-Z) to close-up test, then utterly unexpectedly, the focus of the lens jumped to infinity !   I couldn’t believe my eyes.  On the repeated test, the lens behaved like this again.  

(Note, only the Sony Macro 30mm showed this strange phenomenon, not with other lenses such as 12~24mm Zoom or Zeiss 55mm F1.8)

Since the lens was not mounted to the Sony body, its mean no connection to the power supply, how the focus motor can move ? ? ? —– (Is Sony lens got internal power back-up inside of the lens barrel, such as a super capacitor ?) —– The most peculiar things was, how the lens did know if the lens was mounted on the camera (even though it was not on Sony camera) and aimed at a close subject or not ? ? ?    In other words, when the Nik-Z and the Lens was left alone or lens alone, it doesn’t move at all, as if the lens got its own self-awareness !   Otherwise, who is activating this phenomenon ? (Further test found that the lens alone ( without being mounted to any camera (Sony or Nikon which ever)) moves = both F-Aperture and Focus moves = the lens got internal power back-up —– When the lens was aimed to dark object = Focus moves to far,  and if it was aimed to bright subject (such as the Sky) the focus moves to the closest.)   (Microchip may operate with little power though, the motor driving the lens for AF needs a certain amount of power = even a super capacitor can not operate long.)   The another question is, is it only to annoy the people ? ( —– to whom ? —– How many people in the world would experiment like this, other than me ! ? ) otherwise what is it for ?  = It’s nothing but a mystery is it  ! ? ? ?

Sony’s camera division was created by the former Minolta people who developed the world first Auto Focus SLR, Alpha 7000.  Once I was invited to visit Minolta’s Osaka HQ as a camera critics and met Mr.Kobori who lead the creation of A7000 system.   However, why Minolta couldn’t keep the position of top runner was, that they gone too far on the system design. = Try to fulfill all the possibility of the photography, then trespassed the secret of the individual creativity.   So that, despised by the top photographer (Even if they do use the same technique, they don’t want it given by the camera.)  —– while looking back, I’m not sure whether the bad habit or paranoia of the Minolta people still hanging around Sony’s floor ? ? ?   😀   (Isn’t this a paranormal, or horror story ?    This is a camera equivalent of a severed head speaks ! — If not a poltergeist )   😀

 


To see if it was a joke or accident, I tested them again.

Nik-Z-E mount-(B2)-001

The Sony 30mm Macro was mounted on Nikon-Z via homemade NEX to Nik-Z adapter, when the Nikon-Z was switched on, the image appeared then with a bit of noise the black frame appeared (photo left) as the lens focus seemed to be close up, I aimed the camera out of window (photo right)

Nik-Z-E mount(B1)-001

And, I put an object for close up —– then spontaneously the focus was moved to infinity, seemingly to destruct the close up image !  (Strange ! — Image sensor is Nikon-Z side which was not connected to the Sony lens —– How the lens did know it was a close-up image ? ? ?)    (I wonder, if the devices started to communicate each other with a common code by NFC, Near Field Communication kind = rather futuristic horror story isn’t it  ?) 

All those were happened while the lens 30mm Macro was on the NEX to Nik-Z adapter, its mean, the lens was having no power supply or feed back from the camera body.

(Yet still, as I said few lines before, if the devices started to communicate, and using RFID like system, lens may able to receive the Info’ even a power from the camera body ! —– and near future, the camera may starts to beep beep you “The girl sitting over there is a well-known model, would you like to take her picture ? ” )   😀

Still, the question is the same = What makes the lens focus move without power without intelligence of the image.    What was that for ?    (I need to ask SONY —– I gave an inquiry of which the Case number was  18 ****8 —– Who answer me ? ? ? —– In fact, I wonder how many technician in Sony ever got knowledge of this  ?)

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After I discovered that the lens keeps moving whether it was mounted on the Nikon (using homemade NEX to NikZ adaptor) or left alone.   So, they were the photographic evidences of Sony (or Minolta) zombie state.

SEL30M35-op-001

When the lens detects the light, its focus moved to closest (photo left)  When the lens detect no light (ie; dark) focus was fixed to far — Then suddenly take the lens cap off and aimed to the outside, the focus move back to closest = So, this picture was just before the focus moves (photo right)   (I have no idea what sort of the game Sony heated up ? ? ?  —– But, the game against to whom ? —– It seems all those strange activities were to make this APS-C lens work on a full-frame A7R body = automatically adjust the 30mm image zoom-up to 50mm equivalent image. )   😀

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Leiz Elmarit P Lens on Nikon Z7

While checking a corner of the shelf, I found a Leiz Elmarit projection lens I got from odds and ends box of a camera shop years ago —– in fact it was the same time when I found the Zeiss Taron lens in the same box for £1 each.  To make Taron lens for ordinary camera use I did quite a lot of work —– and to make a helicoid for this Leiz lens, even more work was anticipated.   Then, when I got a 58mm reverse adapter ring for  Nikon Z, I got other idea to modify this Leiz lens easily.

Since its rivers adapter got 58mm screw, I found it could be used to mount a helicoid extension ring  M58 to M58 mount, 24mm ~ 55mm extension, together with some joint rings to connect to Leiz lens.

Nik Z-58mm, Helicoid ring, 58mm-52mm, K4 and K5 from old Nikon K-ring (having 52mm screw), 52mm-49mm, then put the Elmarit P lens on it. = no cutting or glue work, just put together.  So, here is the Leiz Elmarit P 50mm F2.8 for shooting on Nikon Z7 use.  (Note, helicoid ring was mounted riverse direction and the infinity focus was made while helicoid was slightly rotated position.)

Projection lens may be designed for close range use = may not have the best result on far subject.  And the test picture showed rather funny off-focus bokeh on the fore-ground.

elmarit(4)p-001

Still not too bad result for closest distance (23cm) and its out of focus bokeh was very smooth and soft here —– any way, Leiz Elmarit lens 50 mm F2.8  costed £1 + some odd rings. 

elmarit-p-50mm f2.8-dsc_0204 I like a subtlety created by the clean image as well.  Leiz is good in cool image. Unlike Sony, Nikon Z doesn’t exaggerates the tone.

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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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In Comparison — (D850/Z7/A7R)

Strangely it may sound though all those photos were taken on the same settings = AV, ISO 100, Shadow and -2 comp.  But the lens of top photo was Nikon mount Zeiss 18 mm F3,5 (at 5.6) on D850 and the photos below, the Left were Pentax 110 Auto 24 mm F2.8, the Right were So-called Omunifocus Fun lens about 28 mm F13.  The timings were as marked.  (despite the same Shadow setting, why the sky on this picture was not so orange was = that they changed the color so quick.)

And those photos were by a Nikon Z7 camera.  Left was Pentax 110 lens, Right was Fun lens.  See within 2 minutes, how quickly the sky changes.   By the way, camera was not stationed on a tripod but hand-held —— while changing the camera and the lenses, time fly.  (In comparison, Z7 can give clearer and clean image than A7R)

Those photos were by the Sony A7R camera.  Again Left was Pentax 110 lens, Right was Fun lens.  Note, in here right photo was the earliest photo among all those photos.  (seemingly, A7R gave the most orange shifted color) 

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