M81/M82 with background IFN (Tristan Campbell)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: 13 sig02 UMa · 22 UMa · 24 d UMa · 27 UMa · Bode's Galaxy · Cigar Galaxy · Coddington's Nebula · IC 2389 · IC 2438 · IC 2574 · IC 511 · IC 520 · IC 529 · M 81 · M 82 · NGC 2614 · NGC 2629 · NGC 2630 · NGC 2633 · NGC 2634 · NGC 2636 · NGC 2641 · NGC 2646 · NGC 2787 · NGC 2810 · NGC 2814 · NGC 2820 · NGC 2892 · NGC 2909 · NGC 2957 · And 20 more.

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M81/M82 with background IFN

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M81/M82 with background IFN

This is a test image with a Sigma 105mm Art lens last night. Fantastic lens but not quite convinced on the quality of the stars and am struggling to get rid of coma. This is taken at f/1.4 and has been cropped a little. Any feedback on if I need a different copy of the lens appreciated, this is about as good as I've managed so far with a few spacers which have improved it a bit. No noticeable improvement if stopped own to f/2 so just left it wide open. Crop of unprocessed and cropped out stars in revisions showing coma from one corner.

Original
B
C
Final
D

B

Description: Coma

Uploaded: ...

C

Description: Added M81/M82 data from RASA, blue star cleanup

Uploaded: ...

D

Description: Reprocessed

Uploaded: ...

Yorkshire Astro Imaging

Integrated Flux Nebula

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Status	Advanced success
Started	...
Astrometry.net job	4663039
PixInsight job	TYBUVD0QI4OGB48IRSNCAD2JMNFACMSN
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	09h40m05s.9
RA (top/left)	08h21m57s.3
RA (top/right)	09h22m20s.8
RA (bottom/right)	10h32m55s.6
RA (bottom/left)	10h14m26s.3

Dec (center)	+70°29′01″
Dec (top/left)	+73°42′31″
Dec (top/right)	+63°55′35″
Dec (bottom/right)	+65°47′23″
Dec (bottom/left)	+76°49′54″

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M81/M82 with background IFN

M81/M82 with background IFN

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Image Index:

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M81/M82 with background IFN

M81/M82 with background IFN

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C

D

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