Yoshizen's Blog

Macro shot ?

Z55 – A7R4

Once before I found a trouble of manual focusing in the Sony camera. So, I was testing Zeiss 55mm lens on A7R4 body with Focus peaking and the Focus magnifire. —— This time both function worked well = AND I amazed by its fine details of the captured image. = The silk flower was 100 cm away yet the enlarged image showed a real close-up = macro quality.

Z55 – A7R4

I wonder IF this fine quality came from the quality of the Zeiss Sonner FE 1.8/55 ZA lens or the camera’s 60MP image sensor ?

AI Nikkor 50 – A7R4

For comparison, this one was AI Nikkor 50 mm F1.2 (at F1.2 / 100 cm) on A7R4 (this 50 years old 50 mm lens seems to be a bit softer than Zeiss 55 mm —– But, F1.8 lens got to be sharper than F1.2 !)

AI N 50 – N Z7

Then, how about the AI Nikkor 50 mm F1.2 lens on Nikon Z7 ? It’s haed to tell if a bit softer image was caused by a larger F aperture (F1.2 instead of F1.8) or a bit fewer pixel number (46MP instead of 62MP).

P110-24 – A7R4

On the same setting, I tested it with the remotest possible lens = Pentax 110 Auto 24mm F2.8 lens === 24 mm lens image was far smaller than the 55 mm lens. Still, the enlarged image showed quite a fine detail !

It’s suggests that as long as the lens was seriously designed good lens, its can produces very fine details = IF the resulting image was not very fine, it was because, the camera / image sensor / image processer was not good enough.

P110 – NZ7

This is the comparison = The same Pentax 110 lens was mounted on the Nikon Z7 body through a homemade NEX – NZ adapter. —– Even though the same optical image was projected, the smaller sensor seemed to produces a bit rougher image.

Godo – A7R4

So, see the image of the lens which was not seriousely designed or made = homemade Godo-lens.

NZ-B – N-Z7

Then, how about the image made by yet another fine camera Nikon Z7. —– But (you believe it or not) I don’t have an authentic lens for this Z7. (I’ve been empoverished by its XQD memory (made by Sony), expensive spare battery etc —– I can not afford to buy their lens.)

So, the Z7 camera was tested with another homemade lens, NZ-B lens which showed very fine undefined image !

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Lens quality — in different aspect

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While watching the morning sky (8:52 AM  GMT  24-12-2016) I saw a light of an air craft.  I clicked my Nikon D810 with Zeiss Distagon 18mm (for Nikon mount) thinking if the light was captured.

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—– With my amazement, not only the light but also the air craft itself was clearly captured. 

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It’s difficult to see on the original photo, still on the enlarged image, not just the light but the shape of the airliner was clearly seen.  Yes, this IS what we call the resolution, the quality of the lens.  (May be, the quality reflecting its Thousand pound price, more precisely. —– still, this lens was made by the Coshina, Japan whom Zeiss entrusted.)  (By the way, those photos were taken through the dusty double grazing window, so, they were not in the optimum quality. = I’m not such keen to wide open the window or go cold outside for this kind of shooting. — sorry, lazzy me.)

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I found an interest to see the comparison of the lenses.  (Photo above was the same Zeiss 18mm image and its part enlargement of the bottom right — See a crane and its red light behind the tree branches.)

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Oh, how sweet !  This image was made by the homemade Mag Lens. — not much details (because of heavy Coma aberration) yet, strangely the image of the tree was somewhat retained.  That was why I love this lens !  If you know any optical filter or digital manipulation which could create same to this effect, please let me know.

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This was rather surprising, what I found was some detailed images from utterly cheap (two plastic) Toy Camera lenses ! = faint though, the red light was still visible.  —– This image might impose you a question, in reality, what quality you actually need, with what price ?   Wasn’t that just a useless obsession or vanity to have 40, 50 Mp Hi-resi images = What are you going to do with it ? And after you died, who is going to keep your photos ?  (My photos are destined for a landfill, that why I’m showing them here in 700 x 300 pic size while I can, for somebody to have a fun,  Ha ha ha.   😀 )   (The quality of a photograph is not its sharpness but its context.)

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For a comparison, the another thousand pound lens = Canon EF 24~70mm F2.8 was mounted on Sony A7R, fixed as a 28mm lens — though, may be with fully open F2.8 or being as a Zoom lens otherwise because of Canon = showed some details and the red light but far behind the Zeiss’ sharpness.   

So, they were some rough guide to the lens quality. — or I’m saying, toy camera or homemade lens are not too bad.    😀

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