Yoshizen's Blog

Sony vs Nikon

AI Nikkor 50mm F1.2 on Nikon Z7 / Zeiss Sonner FE 55 mm F1.8 / Pentax 110 Auto 24 mm on Sony A7R4

This is rather repeated subject = compalison of Nikon 50 mm and Zeiss 55 mm lens and the Image Sensor of each 46MP and 62MP.

Z55 F1.8 – A7R4 (100cm away)
AI N 50 F1.2 – A7R4 (F1.2) (lens was mounted through NIK – NEX adapter)
P110 24mm – A7R4 (Center of image was quite good)
AI 50 F1.2 – N Z7 (The same Nikon lens on Nikon Z7 body)
AI 50 F1.2 –F1.2 & F2.0 on N Z7 (when the iris was close to F2 its image get very clear)
P110 24 – N Z7

On this test Nikon Z7 46MP image sensor performed almost as good as Sony. The Pentax 110 Auto 24 mm lens performed very well on both Nikon and Sony body. (hence this tiny lens is the most well used lens on my gajet)

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Spring Equinox 2020

The photos here were taken by NZ-B lens on Nikon Z-7
But this one was by Pentax 110 24mm lens on Sony A7R-IV

Whether the day was something special or not, when it was dull, photo would be dull. Especially when it was taken by the dullest NZ-B lens. (Still, I think, even if the lens was genuine Nikkor or Pentax 110 lens, the sky like this will be looks like dull —– What else ? )

By NZ-B lens

Whether western people feels it is not so special, Japanese cerebrate both equinox as a national holiday. (春分の日、秋分の日=since those days were related to the rice growing agricultural calender they are important in the Japanese tradition)

The same sky in the evening, taken by NZ-B lens on Nikon Z7 —– I like this soft tone.
And the same sky, further down in the evening by Pentax 110 24mm on A7R-IV

The sky looks quiet.

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3 – 11 Sunrise

Like on the morning of 9-11 in the United States, the sun doesn’t rise straight on 3-11 in Japan.

6:51 / This photo was taken by the Pentax 110 Auto 24mm lens on Sony A7R IV

And I saw it the same in here.

7:06 / P-24mm on A7RIV
6:55 / Distagon 18mm on D850
6:57 / Godo lens on N-Z7
7:03:05 / Godo lens on N-Z7
7:03:22 / Godo lens on N-Z7
7:05 / Distagon 18mm on D850
7:03:22 / Godo lens on N-Z7
7:07 / Godo lens on N-Z7
7:59 / Godo lens on N-Z7

Nine years ago Japn saw its one of the biggest earthquake and the Tsunami. Since then even the sun seems to aboid to see the eye to eye straight. ———-

___/\___

Yet on the afternoon, it turned out to be a best brilliant day in this spring !

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Moon for a Test

The photos here were taken by the Zeiss Sonner FE 55mm F1.8

It seems, the Moon on the 8th of March was a full moon (or so) = So, I clicked my camera, happen to be a Sony A7R-IV—– with a Zeiss 55mm, Olympus PenF 38mm, Pentax 110 Auto 24mm and a Nikkor 50mm F1.2.

It was an interesting test session for the lens and the camera.

Photo left = Olympus PenF 38mm F1.8 / Middle = Pentax 110 Auto 24mm F2.8 / Right = Nikkor 50mm F1.2 lens (Nikon lens has the resolution more than the 60 MP image sensor but Olympus PenF and Pentax 110 Auto lens didn’t )
Photo left = Zeiss Sonner FE 55mm F1.8 at F5.6 / Right = (old Ai) Nikkor 50mm F1.2 at F5.6

Apparently, Nikkor showed much sharper image than a Zeiss Sonner lens but there was a reason behind = AF lens on A7R-4 on Manual Exposure setting worked pretty badly = Auto Focus didn’t work, neither Focus Magnifier was there. (Focus magnifier on the A7R was very effective but not on this latest model ( = where is the Button ? ? ? = I found that the AF-on button needed to be customized !) —– Sony might be making their camera not friendly with anything other than their genuin Sony Lens. – If so, why Sony-Zeiss Sonner didn’t focus Moon ?)

Nikkor 50mm F1.2 – F5.6 — (It seems, the white balance was wrong, and the Sony’s image process was too funny = make a moon looks like plastic ball was dreadfull.

You would say that to take picture of the Moon with 50mm lens was the crazy idea. THOUGH, the 60 MP Sony A7R-4 image sensor should be capable to be enlarged to such extent. And this picture demonstrated it well. (It’s works as long as the lens was good !) (You can see a proper Moon shot here )

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First Reiwa (令和) Sky

So, this is the sunrise (over the roof) 1st of April 2019  06:18 ( = British Summer time 07:18) by Zeiss 18mm F3.5 on Nikon 850

Reiwa-110-op-100

And this is the same sky but a minuets before of the top photo, taken by 110 Pentax 24mm on Nikon Z7   (It seems Zeiss lens showed much clear image —– of course, 110 lens costed me only few pounds as a junk, in contrast Zeiss was £800 even for a second-hand = be humble, don’t expect too much)    😀

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PS : Looking around the Net-sphere, it seemed that the news of naming the new era in Japan took so much attention from all over the world.   The tradition to name the Era originally came from Han dynasty of China though,  like most of the culture in China it ceased to exist under the communist rule.  (So that the young Chinese except Taiwanese, even can not read their own classic literature like Laozi 老子, Confucius 孔子 — let alone to understand them)   Yet still, as nearly 1/4 of world population is Chinese, some of them might have studied classic, hence able to read the “Chinese” character 令和 of which the meaning is more or less the same to us .   (Some character’s meaning is quite different between Chinese and Japanese = such as for flowers, Chinese use 華 , Japanese use 花 but for Chinese this letter 花 mean mor like a lot of mess, therefore 花子 in China mean a beggar wearing tattered rug. — without knowing this, quite few Japanese girl got their name Hanako 花子 ! )

The meaning of the character 令 is “telling or announcing” = so that, with an additional 金 (metal) to its left hand side, like this 鈴 it’s become “Bell”

And the 和 mean “come together or harmonize”  so that a word 平和 mean peace ( 平mean “flat or plain”) = Everybody come together in harmony” is a Peace.

Therefore, 令和 Rei Wa mean, Calling a Harmony  or Telling, be in Peace”.  (May be not as strong as “Shut-up, you the Devil”)   😀     (By the way, officially Reiwa starts on the 1st of may, coinciding with the new Emperor to take the throne.   This, one month ahead schedule was for the people to prepare such as for printing the calendar.)

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Fortnum & Mason’s Window 2018 taken by 3 kind of Lens

Three kind of lenses were used for those photos.  Looks normal straight lens was Ultra Wide Angle Lens (Sony 12~24mm F4 Zoom).  And if the image has dark surroundings it was by the Pentax 110 auto 24 mm F2.8 Lens.   If the image got heavy anastigmat aberration, it was by a homemade So-called Helicoid-B lens.

Some of you may not like though, never mind it wouldn’t kill you.

And I wish you a Happy New Year. 

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110 Pentax 24mm Lens test

Considering the image size of the 110 Instamatic was 17x13mm, so that a lens for that camera could able to perform like this on the 35mm full size was rather amazing.  (In fact, inevitable corner fall off is creating even nicer atmosphere)

Such a small lens on a small mirrorless camera is very handy though, to be honest, such convenience makes rather casual attitude of the shooting, and often produce unsharp / blurred image.  I often create blurred image though, it was “when I intended” —– otherwise, it was nothing but a failure.  (another trouble was, that against such small lens, the shutter shock of A7R is comparatively big = tend to make blurred image) 

Such pictures may not have any artistic value still, if we could read the name etc. the details on the goods, there might be a bit more interest.

I wouldn’t pretend any meaning on those images, —– just an atmosphere.

And may be a kind of the test of the lens character.

This photo showed rather interesting phenomenon.  The center is not as sharp as its surroundings = the lens may be showing the curvature of the image.  —– But, I don’t believe such as like the Pentax made a lens having an image curvature.   This got to be what they intended =  intended what = to compensate the curvature of the film. 

I think, other than the Pentax design team, not many people has tested this lens on the camera other than the dedicated  Pentax 110 Auto  body.   Naturally,  the test on the 110 Auto was done by an Instamatic Caset film = which may have inherited curvature of the film though it has been compensated by the lens’ own image curvature.   It’s mean, nobody was able to notice the image curvature of this lens before.  (other than the very Pentax design team) —– How interesting.   😀

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110 Pentax 24mm Lens (2)

I realized that the tiny toy like Pentax 110 camera’s 24 mm F2.8 lens appeared to be very critical lens.  What I mean critical is, as it was designed by the Pentax, aiming to achieve their 110 photo’s quality comparable to full size 35 mm, so the quality of the lens is very high —– and it’s requirement / the standard must be also high. 

In this blog, I’ve been plying with hundred of tinkering job, —– though, its standard is pretty casual.  I’m doing it in my kitchen, without having even an optical bench.  And I demonstrated that how the standard of the optics can be not critical. = typically like “Twisted lens” demonstration or  “F-Aperture control” kind. —– still I could manage those tinkering with good success.   So, when I adapted 110 24mm lens to Sony A7R body, I just made a hole in a Sony’s body cap and inserted the bottom of the 24mm lens then fixed it by Epoxi glue.  I thought, I’ve adjusted infinity very well (as A7R’s focus peaking works perfect) —– but later, I noticed that the focus was not even = left-hand side was a bit out.

110 Pentax(2)_DSC0481-003

110 Pentax(3)-002

Yet, the slant of the lens was barely visible = the lens may not off the straight perpendicular less than 1 degree —– though, lens was short focus 24mm, of which only 2mm of lens shift makes the focus from infinity to 0.35m.  It’s mean, even less than 0.1mm off-position on one side would spoil sharp infinity image. (Especially, here the lens is always fully open F2.8)

There was a funny paradox here.  24mm lens for 110 Pentax was a standard lens, = obviously, the lens for 110 Pentax was expecting to be used and worked as a standard lens.  But the same 24mm lens for 35mm camera was a very wide-angle. Therefore, while 24mm lens for Nikon was having distance scale  ∞, 3, 1.5, 1, 0.7 —m, 24mm lens for 110 Pentax has much finer scale  ∞, 8, 4, 2, 1.5, 1, —m,  and the focus seemed to be also quite critical.  (But, to fully satisfy those potential in the Pentax Auto 110 needs to have very delicate, fine handling while see the image in its small SLR view finder —– though, as the 110 body here was broken and I couldn’t see the finder image, I can’t tell if their aim to make hi-quality image was materialized by this system as a whole or not.


 

110 Pentax Lens on A7R

OMG, —– I found a EOS 620 body and a tiny Pentax 110 (both of them were broken junk state) for hefty £5 in the odds & ends box of the City Camera Exchange, Strand Shop.  (They got the best junk in London as well as the latest expensive cameras, and if you feel hungly, you can have the best lunch or dinner in the Simpsons, only few steps round a corner.)   😀

EOS body may be used as a display dummy for my (Canon mount) homemade lens, and the tiny 110 Pentax lens, should make a good fun to test it. 

To test this Pentax lens on Sony A7R body was very easy = just mount the tiny lens on an A7R body cap — Infinity focus was happened to be almost straight.  (but there is no Iris as the camera was designed to give an Auto-exposure by Aperture and the Shutter speed combined system.  = So, the lens works as a 24mm F2.8 only lens, and the focus works very well. (If your finger is small enough to pinch its small lens front)   😀

As the lens is rather bright F2.8 = focused depth is quite shallow yet still, the image where focused was very sharp and crisp.   Though, since the lens was designed for 110 Instamatic size, image circle doesn’t cover the 35mm full screen of course.   (and I wouldn’t attempt to make it Retro-focus with a concave lens to spread the image.)

Don’t to be fooled, even if the camera, lens were such small, like a children’s toy,  Pentax seemed to designed its lens with their full force. = image was such crisp = I would say, too prosaic !  The lens showed no chromatic aberration, in fact it got no aberration at all.  (May be in reverse use, lens may work as a pretty good macro lens. —– I’ll test it on future.)

Still, such small lens on the small mirrorless camera is very comfortable and CUTE ! = I wouldn’t complain the dark surroundings.  Its a own character and a part of fun.

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