Author Topic: 300mm f/4.5 ED-IF AI Nikkor on D850...  (Read 338 times)

David H. Hartman

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300mm f/4.5 ED-IF AI Nikkor on D850...
« on: February 27, 2021, 00:10:29 »
This is a quick and dirty test of my 300/4.5 ED-IF AI Nikkor on my D850. The D850 is brutally intolerant of focus errors with this lens. This lens exhibits purple-magenta blooming of harsh spectacular highlights. The problem is visible even in thumbnails. It seems largely correctable in Capture NX-D. Lateral color aberration correction, on by default, seems to soften the central image slightly so I turned it off. [Yes but Lateral Color Aberration correction helps at the edge so I turned it back on]. An Axial Color Aberration setting of 50 or more is helpful. The following are samples of the center image without then with an Axial color aberration setting of 70. This test is a worst case scenario.

I hope some find this test useful. A less demanding test subject failed as I blew the focus.  >:(

Dave

I just noticed that right click, "View image" and clicking the image shows the image at full resolution, 1:1 pixels.

The following are f/4.5 without and then with Axial color aberration correction followed by f/8.0 without and then with Axial color aberration correction. The JPG(s) were creates as 100% pixel images...

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Jack Dahlgren

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Re: 300mm f/4.5 ED-IF AI Nikkor on D850...
« Reply #1 on: February 27, 2021, 01:16:48 »
Wow, that first photo looks like magic.

David H. Hartman

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Re: 300mm f/4.5 ED-IF AI Nikkor on D850...
« Reply #2 on: February 27, 2021, 01:42:04 »
Unless I'm loosing my mind one set I shot had worse purple blooming at f/5.6 compared to f/4.5 and f/8.0. That doesn't make sense. I ran out of time to do anymore test shots.

My thinking is I can use this lens with my Nikon D850 provided I stop down a stop or so, use Axial Color Aberration correction as needed and especially if I avoid pixel peeping.

I don't care I'll just float a check

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Critical focus will be a crap shoot!  8)

Did I mixed up the games?

Dave

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Snoogly

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Re: 300mm f/4.5 ED-IF AI Nikkor on D850...
« Reply #3 on: February 27, 2021, 02:54:20 »
Wow, that first photo looks like magic.

Reminds me a lot of some special effects in Star Trek series one.

David H. Hartman

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Re: 300mm f/4.5 ED-IF AI Nikkor on D850...
« Reply #4 on: February 27, 2021, 10:54:05 »
I turned Lateral Color Aberration correction back on because it helps at the edges. I probably knew that in a past life.  :(
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David H. Hartman

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Re: 300mm f/4.5 ED-IF AI Nikkor on D850...
« Reply #5 on: February 27, 2021, 11:01:25 »
Reminds me a lot of some special effects in Star Trek series one.

Now that I think of it the purple blooms look like the blossom of a common variety of ice plant found around So. California.
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Gil Aegerter

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Re: 300mm f/4.5 ED-IF AI Nikkor on D850...
« Reply #6 on: March 19, 2021, 05:44:49 »
Wonderful lens, though!

David H. Hartman

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Re: 300mm f/4.5 ED-IF AI Nikkor on D850...
« Reply #7 on: March 19, 2021, 06:50:26 »
Wonderful lens, though!

It was designed for film. Then again my test was pretty much a worse case scenario. If like me a photographer doesn't have any other 300mm lens them know the weakness of the lens and work around it.

Dave
Beatniks are out to make it rich
Oh no, must be the season of the witch!