Author Topic: Noct 58/0.95 - technical  (Read 35061 times)

Nikfuson

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Noct 58/0.95 - technical
« on: November 01, 2019, 21:22:03 »
Ok, back with more techie stuff. First plane of focus at ca. 2m. Pretty flat!

Nikfuson

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Re: Noct 58/0.95 - technical
« Reply #1 on: November 01, 2019, 21:39:59 »
Bokeh at min focus distance (0.5m). We're still talking f/0.95.
I can't spot any concentric pattern.

Nikfuson

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Re: Noct 58/0.95 - technical
« Reply #2 on: November 01, 2019, 21:41:07 »
No bloomy 0.95 aberrations either.

Nikfuson

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Re: Noct 58/0.95 - technical
« Reply #3 on: November 01, 2019, 21:53:12 »
First shot outdoors (1m), second one indoors (with 100% crop) at the same distance. There is a bit of LoCA but nothing I would be bothered with, say like the LoCA found with the venerable neo-noct 58/1.4G.

Birna Rørslett

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Re: Noct 58/0.95 - technical
« Reply #4 on: November 01, 2019, 22:44:38 »
I found with the Noct files I have played around with so far that the RAW engine used had significant impact on the outcome, including the handling of colour aberrations. So, which one did you use?

Nikfuson

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Re: Noct 58/0.95 - technical
« Reply #5 on: November 01, 2019, 23:31:13 »
I ran these through ACR and Photoshop. I’ve left all corrections at zero.

Birna Rørslett

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Re: Noct 58/0.95 - technical
« Reply #6 on: November 02, 2019, 00:09:07 »
CNX-D removes much more of the colour nasties.

bobfriedman

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Re: Noct 58/0.95 - technical
« Reply #7 on: November 02, 2019, 01:07:20 »
NX-D also has the proprietary WB coefficients. ACR just approximates them.  you could try to use a colorchecker profile to correct if you don't wish to use NX-D.
Robert L Friedman, Massachusetts, USA
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Øivind Tøien

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Re: Noct 58/0.95 - technical
« Reply #8 on: November 02, 2019, 05:50:18 »
Weather permitting, any chance you could get some well focused star images, say 3 second exposures wide open and slightly stopped down in 1/3 stop steps?   ::)
Øivind Tøien

John Geerts

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Re: Noct 58/0.95 - technical
« Reply #9 on: November 02, 2019, 12:17:16 »
I ran these through ACR and Photoshop. I’ve left all corrections at zero.
The lens is not known in ACR yet?  For the Z 50/1.8S I had to de-select the Lens Profile Corrections which was on !!  Very nasty.

Nikfuson

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Re: Noct 58/0.95 - technical
« Reply #10 on: November 02, 2019, 12:47:06 »
I am trying to provoke the optical results to see what’s in there. But the green purple haze is actually easy to remove, even in ACR. There is already a lens profile in the raw file that ACR recognises. Will see if I can borrow the lens for a couple of days to do more «photography» in addition to boring testing.

John Geerts

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Re: Noct 58/0.95 - technical
« Reply #11 on: November 02, 2019, 12:49:02 »
Great results so far, good luck with the 'Photography'    ;) 

Nikfuson

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Re: Noct 58/0.95 - technical
« Reply #12 on: November 02, 2019, 16:33:05 »
Here’s one example; ISO 1600, f/0.95, 1/100s.
Snapbridge to iPhone and PS Express. Quick and dirty job.

Nikfuson

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Re: Noct 58/0.95 - technical
« Reply #13 on: November 02, 2019, 17:32:18 »
Here to try and illustrate the bokeh transition and the sharpness (f/0.95). Twas a bit windy so leaves moved a bit.
Funny how Adobe interprets aperture below f/1  ;D

Nikfuson

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Re: Noct 58/0.95 - technical
« Reply #14 on: November 02, 2019, 17:59:27 »
I see the sharpness as adequate for an aperture below 1.