Yoshizen's Blog

Lens Comparison (2)

Z-18mmThis photo — by the Zeiss 18mm F3.5 on Nikon D850 / ISO 800, 250th Sec —– (All the photos in this post were cropped only in its hight, and the width were kept as its original to show the relative angle of view of each lens —– for example, after the widest 18mm, next wide image was shown here by the Fun lens, which was originally an one-time use panorama camera and the viewing angle was the 35mm equivalent of 27mm lens.)

Seeing the same old sky, I took the picture of the same, with many different lenses —– and made more or less the same images.  😀

Comp(2)-A09A8019

Still, they are only a half of my homemade lens stocks.  (It’s annoyed myself a bit) 😀

Helic-BThe first of this operation was, the Helicoid (B) with a setting of ISO100, 650th Sec —– since this lens has the brightness about fully open F2.2,and 2.2 only = no iris = needed to use lower ISO.

FunBy the so-called Fun Lens / ISO 100, 15th

Helic-ABy the Helicoid (A) / ISO 100, 320th

G9By the G9 lens / ISO 100, 1250th

DD-PinBy the Double Density Pinhole / ISO 6400, 250th

G10By the G10 lens / ISO 50, 640th

MagBy the Mag lens / ISO 50, 650th

Son-30mmBy the Sony 30mm F3.5 / ISO 50, 500th —– I can not stop thinking, what this “sharper” image can give us, more than the other fuzzy images ?

SZ-55mmBy the Sony/Zeiss 55mm F1.8 / ISO 50, 2000th (It seems something wrong with this lens’ focus = even with manual setting, the lens moves away when the shutter was pressed = may be that’s why it was offered so cheap. (and lots of them in the Ebay)   😀 

Koda-Red100 years old Kodak lens (equivalent of 175mm F10 / ISO 400, 500th —– as a 175mm telephoto lens, the image was quite good, especially considering that the lens consists only symmetric 2 glasses, that’s all ! )

Koda-FunBy the Koda-Fun lens / ISO 50, 4000th

SZoomBy the SZ lens / ISO 50, 1250th

OmuniBy the so-called Omuni (focus)lens / ISO 50, 1250th

More or less the same fuzzy images though, still got each character.  It’s not too bad to play with those lenses.  (Anyhow, they didn’t cost me much — still gave me a lots of fun)

.

 

 

Advertisements

Helicoid Lens (A)

Helicoid Folder(1)-DSC08423

While hibernating in the winter (because, I can’t go ski kind, let alone climbing the mountain, = still have to do something — I made yet another homemade Lenses. (this time using a focusing helicoid sold in the net.)

Helicoid Folder(2)-003

In the political stance, I should re-use other old camera’s lens barrel kind though, they may not come when I want.  So, I bought some focusing helicoids from China such as 12~17mm, 17~35mm, 36~90mm, mostly M42 fitting.  (M42 rear mount / Pentax screw mount can be easily converted to Nikon, Canon, Sony-E with a simple (and cheap) adapter.)

Helicoid-B(2)-A09A7721

And the lens I used was came from broken Sony zoom lens. (In the center of the photo above, two of the small lenses)

Helicoid Folder(4)-001

So, the game starts = how to fix a small irregular shaped lens to the helicoid.   In here, cut a card-board paper to the shape (Photo left) and mount into an empty filter ring (Photo middle) — and 52mm filter ring was mounted to the helicoid. (Photo right) = to test and check if the infinity focus can be made. —– (this approach failed)

Helicoid Folder(5)-002

And in here, another lens was temporally mounted on a helicoid with soft plastic patty (Photo left) —– Photo middle showed the lens on the previous photo was screw mounted to an aluminium ring which was epoxy fixed on to the 52mm filter ring, and to the helicoid, then to the camera body. (Photo middle and right) —– (For clarity sake, those photos were taken before the mat-black paint was applied

Helicoid Folder(6)-00

This lens, with about 65mm focal length has an Iris ! —– though, the image made by this lens was too bad (except pretty good center) and the effect of the Iris was not much help.  😀

Helicoid folder(7)-Fullmoon-31-01

So, they are the images. (Looks hopeless coma aberration)

My attempt to make homemade lens has been having funny paradox, while making the lens DIY, the image quality was just fuzzy and poor, —– yet still, I’ve been trying to make it somewhat usable. —– ? ? ?    Then the “Enlightenment” came which was “Why not”  It IS the nature of the lens = bad lens makes bad image.  What’s wrong ?  The top photo here was made by this, Helicoid Lens (A) —– I think, this bad image was not too bad.  I like this painterly effect.  Don’t you agree ?  (It seems, the Japanese Zennists are visiting here.   So, those “Play with lenses” are also the demonstration of the “Mind game in Zen”=  “liberate yourself from a stucked mind” “Why not”    Ha ha ha.   😀 )

.

Birthdays Party

birthday Party(1)-DSC_0278

There was a kids and grownup’s joint birthday party among the member, ex-member of the Dorkbot / Spacehijuckers.  Where it took place in the notorious Lime house Town Hall, where the lighting was notoriously awful pink light. 

birthday party(2)-008

Made a situation even worse, I took pictures with a notorious homemade SZ lens and the 40 years old Nikon fisheye lens on Nikon D850.  And the result was what you can see.

birthday party(3)-009

birthday party(4)-005

birthday party(5)-010

birthday party(6)-DSC_0297

birthday party(7)-006

birthday party(8)-003

birthday party(9)-DSC_0307

Somebody started to do a clay craft, try to show their creativity.  —– Following the foot step of Marcel de Champ I made a toy size urinary = great attempt (I think).

birthday party(10)-004

birthday party(11)-001

birthday party(12)-002

birthday party(13)-00

birthday party(14)-007

SZ lens is about 100 mm F1.8 though, as it doesn’t have a clear focused point, it is not easy to use, especially under the dim pink light.  😀   (Of course, their  lighting can be set to neutral white though, if it was their choice I have to follow.   (Or, I should have brought own my light.) —– don’t worry it was just a party.     Happy Birthday !

.

 

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)

Omni lens(1)-001

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 ? ? ? ) 

.

F & M Window decoration for 2017

It’s an old story still, I don’t want the staffs stuck and left over.  (Get clean up before the year changes. )  😀

F-M-17(1)-DSC_0171

F-M-17(2)-DSC_0116

F-M-17(3)-DSC_0149

F-M-17(4)-DSC_0118

F-M-17(5)-DSC_0114

F-M-17(6)-DSC_0119

F-M-17(7)-DSC_0112

F_and_M,Dec'2017(8)-004

F_and_M,Dec'2017(9)-006

F_and_M,Dec'2017(10)-005

F-M-17(11)-DSC_0105

F_and_M,Dec'2017(12)-000

F-M-17(13)-DSC_0087

F-M-17(14)-DSC_0134

F-M-17(15)-DSC_0139

F-M-17(16)-DSC_0096

Hee Ha, — of course all those photos were taken before Xmas, but I was busy making a lens.  😀

And those pictures, if the image was distorted, they were taken by Nikkor Fisheye 16mm F3.5.  And the rectilinear wide-angle image  were by Zeiss Distagon 18mm F3.5 —– the rest of fuzzy images were taken by a homemade G9 lens all on the Nilon D850.   Thanks for watching !  (Don’t drink too much tonight.)  😀  

.

Oxford Street, it WAS

OxFSt(1)-DSC08063

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

OxFSt(2)-DSC08068

OxFst(3)-dec'2017-003

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

OxFst(3B)-DSC07979

OxFst(4)-dec'2017-001

OxFst(5)-dec'2017-002

OxFst(6)-dec'2017

OxFst(7)-DSC08044

OxFst(8)-DSC08059

OxFst(9)-DSC08055

OxFst(10)-DSC07993

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

OxFst(11)-DSC08078

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)

.

NZ Lens

NZ(1)-A09A7693

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.)  😀

NZ(2)- lens

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.)

NZ(3)-lens-002

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.  😀

NZ(4)-lens-5

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. 

.

G9 Snapshot of the town

G9_D850-DSC_0021

DSC_0022-001

D850 with G9-001

D850 with G9-003

D850 with G9-002

DSC_0007

DSC_0018-001

DSC_0023-001

DSC_0025-001

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 ? ? ? 

.

 

G10 Lens Test

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

G10 Test-Pec(1)-DSC07865-001

G10 Test-Pec(2)-DSC07853-001

G10 Test-Pec(3)-DSC07839-001

G10 test-Pec(4)-004

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

G10 tes-Pec(5)-005

G10 Test-Pec(6)-DSC07847-001

G10 test- Pec(7)-006

G10 Test-Pec(8)-DSC07850-001

G10 test-Pec(9)-007

G10 Test-Pec(10)-DSC07859-001

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.)

.

Snap the town by Mag lens (3)

Snap3 by Mag(1)-DSC07800-001

Snap3 by Mag(2)-DSC07807-001

Snap3 by Mag(3)-DSC07806-001

Snap3 by Mag(4)-DSC07810-001

Snap3 by Mag(5)-DSC07796-001

Snap3 by Mag(6)-DSC07811-001

Snap3 by Mag(7)-DSC07823-001

Snap3 by Mag(8)-DSC07812

Snap3 by Mag(9)-DSC07817-001

Snap3 by Mag(10)-DSC07818

Snap3 by Mag(11)-DSC07802-001

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.

.

%d bloggers like this: