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vor 1 Minute schrieb Daniel kk:

Voigtlander Apo-Ultron 90mm f/2 (silver version) attached with a vintage rectangular lens-hood + M10

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Looks good 👏
Do the two shades of silver match well, or is there actually a noticeable difference in reality?

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3 hours ago, Daniel kk said:

Voigtlander Apo-Ultron 90mm f/2 (silver version) attached with a vintage rectangular lens-hood + M10

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What brand is this hood if i may ask?

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vor 6 Stunden schrieb Daniel kk:

Voigtlander Apo-Ultron 90mm f/2 (silver version) attached with a vintage rectangular lens-hood + M10

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First I have a question about vignetting:

Did you notice a difference between your hood and the original hood and the recording without the hood?

I'm asking for the following reason: I've noticed here and there that the replacement clip-on lenses often cause stronger vignetting. One more question: Have you noticed whether anything has changed when taking photos - stray light or shots in semi-backlight?

I'm sorry, I find the hood pictured a lit bit monstrous.

I also have the feeling that the silver lens on the silver camera also looks considerably larger than the black lens on a black camera.

But in the end it is a matter of personal taste.

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3 hours ago, lct said:

What brand is this hood if i may ask?

That is an older Pentax hood. I have several of them from 49-82mm size and they are great. Very well designed - they easily clip onto the lens or filter and they can often clip on in reverse orientation as well. They can be hard to find and it's sometimes a guessing game as to how well they might work for any given lens. I often use them for studio shoots so that I can easily identify the degree of polarization when I shift from V to H. Set the desired amount of polarization to match up with the aligned flat edge of the hood and just rotate the hood 90 degrees when you rotate the camera. 

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On 1/30/2025 at 4:35 AM, M Street Photographer said:

First I have a question about vignetting:

Did you notice a difference between your hood and the original hood and the recording without the hood?

I'm asking for the following reason: I've noticed here and there that the replacement clip-on lenses often cause stronger vignetting. One more question: Have you noticed whether anything has changed when taking photos - stray light or shots in semi-backlight?

I'm sorry, I find the hood pictured a lit bit monstrous.

I also have the feeling that the silver lens on the silver camera also looks considerably larger than the black lens on a black camera.

But in the end it is a matter of personal taste.

Using of lens hood to avoid of light flare in semi-backlight condition is strongly recommended.  The outer diameter of this rectangular lens hood is almost the same as the original lens hood, no vignetting effect is caused by this clip-on lens hood.  The temperature of the silver barrel of lens is lower than those in black color at hot weather photographic condition.

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On 12/14/2024 at 8:50 PM, adan said:

Whether a lens is apochromatic or not has nothing to do with lateral chromatic aberration - and never has.

And, of course, an "APO" marketing designation these days doesn't even have that much to do with the correction of longitudinal chromatic aberration - even for Leica. 

[--]

Cosina is just clarifying that their APO designation is the science-based one. APO relates to axial CA only.

I noted this lateral/transverse  CA in my Elmarit 21mm /E60. And also in my new LLL 28mm/9E, but about the half of the Elmarit. I saw picture @pegelli made with a 75mm Lux and that also showed this effect on the edge of the frame (camera straps doubled). Small things like branches get a life of their own. As such annoying

But I once had the SA 21 and gave that back because of the corners - like this. Too bad.

However I like the rendering of the old Elmarit (Mandler..) so no complaints. 

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At the 1st day of spring season of Chinese New Year of the Snake 2025, best wishes to all M users!

Voigtlander Apo-Ultron 90mm f2 @ f/2 + M10 at the distance of 1m.

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Edited by Daniel kk
add the focus distance
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Voigtlander Apo-Ultron 90mm f2 @ f/2 + M10

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Voigtlander Apo-Ultron 90mm f2 between  f/2 & f/2.8 + M10

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Edited by Daniel kk
add the aperture value
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vor 3 Stunden schrieb Daniel kk:

Voigtlander Apo-Ultron 90mm f2 between  f/2 & f/2.8 + M10

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Thank you for the shots.

Are these the original colors?

I’m asking because the shot with the 90mm f/2.8 Apo Skopar would definitely have had a magenta tint. I’d appreciate it if the new Ultron renders colors differently in that regard.

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2 hours ago, gammarART said:

Thank you for the shots.

Are these the original colors?

I’m asking because the shot with the 90mm f/2.8 Apo Skopar would definitely have had a magenta tint. I’d appreciate it if the new Ultron renders colors differently in that regard.

The color of the images have been adjusted by adding tiny cyan in order to decrease a red tint, a little amount of glow in the high-light area of the images with creamy bokeh is very nice, indeed.

Edited by Daniel kk
answer of color
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On 1/29/2025 at 5:38 AM, Daniel kk said:

Panda @f/2.8, T-shirts @f/2

Sorry to question this, but are you sure the image with the panda is shot at f/2.8?

The cats-eye bokeh balls make me think it is taken at f/2.

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It is an announced feature of the two recent Voigtlander 90s that the 12-blade aperture remains circular, and not a polygon, wide-open and stopped down one or two stops. And also at the smallest aperture.

Whether those apertures produce "cats-eyes" bokeh is a function of vignetting - a separate question.

12-blade aperture diaphragm for beautiful bokeh


The 12 blade aperture diaphragm produces an aperture opening as circular as possible.  Out-of-focus areas of images are drawn naturally and point light sources etc. are drawn as soft round bokeh rather than as polygonal shapes.

https://shop.cameraquest.com/voigtlander-leica-mount-lenses/voigtlander-90mm-f2.0-black-apo-ultron-m/

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  • 3 weeks later...

I bought a brand new black version.
I noticed a strange aberration of this lens when I was shooting far away landscapes with Leica SL2-S and Leica M adapter L.
When I focused on the upper right corner, the buildings in the upper left corner, which should have been almost equidistant from the lens, appeared very fuzzy.
Furthermore, the building in the foreground, which should have been within the depth of field, also appeared blurred, which made me think that the field curvature was large

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Of course, I understand that my shooting conditions are not appropriate.
On the other hand, the sigma 28-105mm f/2.8 DG DN corrected the image very well, so I think it is unlikely that there was a problem with the shooting environment.

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A similar phenomenon occurs with the APO-SUMMICRON M 90mm ASPH, but it is not as bad as with the APO-ULTRON.

The focus is set to the upper left corner, so I am looking at the edge in the lower right corner.
The exposure was slightly adjusted because it was taken with EOS R5 on a different day.

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15 minutes ago, takar said:

When I focused on the upper right corner, the buildings in the upper left corner, which should have been almost equidistant from the lens, appeared very fuzzy.

Are you sure they are equidistant? You chose a wide aperture apparently (f/2?). On a 90mm lens, DoF can be shallow with apertures that wide.

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