Nikon 20mm 1.8 and Milky Way photography
Sep 8, 2021 10:41:59 #
It’s hard to tell with that small upload but it looks to me like your focus isn’t at infinity. I know that lens doesn’t have a hard stop.
Sep 8, 2021 10:56:08 #
Orphoto
Loc: Oregon
alberio wrote:
Very concise answer.
Very concise, and yet utterly the answer to a different question. Don't offend the OP by pursuing the rotational avenue.
Sep 8, 2021 11:20:40 #
Orphoto wrote:
Very concise, and yet utterly the answer to a different question. Don't offend the OP by pursuing the rotational avenue.
Just maybe he has issues that aren't particular to that lens, and by not posting a photo that can be downloaded to view closely it's anyone's guess.
Sep 8, 2021 14:34:33 #
Orphoto
Loc: Oregon
He has at least one other issue (how to upload photos here) but his question was well stated and narrow. I accept his assertion that he usually gets pinpoint stars. A knee jerk request for images is superfluous. A snippet showing his degree of coma at f2.4 might assist others in forming a reply and educate those who have no idea what coma is.
Sep 8, 2021 15:32:57 #
ahudina
Loc: Browns Point, WA
I posted hopefully a better image in the Astrophotography section as advised. I had not posted an image here before and appreciated the guidance provided. Hopefully the new image demonstrates my issue more clearly. Thanks to all for your responses.
Sep 8, 2021 17:03:35 #
I own both and tried a lot of milky way shots with various exposure times and aperture settings but could not eliminate coma. Everything I read about the lens says no one else could either (numerous reviews). I'm no expert but I think it's the lens, not the settings.
Sep 8, 2021 17:37:14 #
ahudina
Loc: Browns Point, WA
cbrennan8 wrote:
I own both and tried a lot of milky way shots with various exposure times and aperture settings but could not eliminate coma. Everything I read about the lens says no one else could either (numerous reviews). I'm no expert but I think it's the lens, not the settings.
Thank you. Exactly the type of personal experience I was hoping to get. Kind of what I thought and I had read reviews but really did not see much review wise relative to Milky Way photography with the Nikon 20 1.8. Think I’ll try again before the B&H return period expires but suspect this will be going back and I’ll hit the gym to tote my sigma art glass around. Thanks again, appreciate the response.
Sep 10, 2021 01:00:19 #
Orphoto
Loc: Oregon
In response to a request
Here is the 100% upper left corner of a zeiss 21mm f2.8 zf.2 lens shot at f2.8 using a D810.
Here is the 100% upper left corner of a zeiss 21mm f2.8 zf.2 lens shot at f2.8 using a D810.
Sep 10, 2021 02:10:21 #
Orphoto wrote:
In response to a request
Here is the 100% upper left corner of a zeiss 21mm f2.8 zf.2 lens shot at f2.8 using a D810.
Here is the 100% upper left corner of a zeiss 21mm f2.8 zf.2 lens shot at f2.8 using a D810.
Looks like even Zeiss has coma. That's why there is such an emphasis on building telescopes with flat fields of view. Some come close, but curved glass tends to distort so corrective optics must be employed. For the most part Milky Way images are viewed from a distance that mostly the trailing of stars are the most noticed distraction.
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