Celestial hemisphere:  Northern  ·  Constellation: Monoceros (Mon)  ·  Contains:  Christmas Tree cluster  ·  Cone nebula  ·  IC 2169  ·  IC 448  ·  NGC 2236  ·  NGC 2239  ·  NGC 2244  ·  NGC 2251  ·  NGC 2252  ·  NGC 2264  ·  Rosette nebula  ·  The star 12Mon  ·  The star 13Mon  ·  The star 15Mon  ·  The star 16Mon  ·  The star 17Mon  ·  The star εMon
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Rosette Wide 135 - First Light!, Martin Palenik
Rosette Wide 135 - First Light!
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Rosette Wide 135 - First Light!

Getting plate-solving status, please wait...
Rosette Wide 135 - First Light!, Martin Palenik
Rosette Wide 135 - First Light!
Powered byPixInsight

Rosette Wide 135 - First Light!

Equipment

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Description

First light for my Samyang 135mm F/2 lens.

Shooting wide open at F/2. Stars are quite nice. There is a slight diffraction on the larger stars mostly near the edges.

This was a big learning curve to calibrate. There is a serious issue with calibrating fast optics and Nikon sensors at low ISO. Who knew astro can be so complicated! I had to use higher ISO flat frames/bias to remove the vignetting. This was the only solution I could figure out at the moment.

Also I do not have a light pollution filter for this lens, so shooting at F/2 was soaking in a lot of LP. I still am a bit confused if the calibrations even worked, I was left with a very smooth image full of a large gradient to process. This was at a semi dark site as well.

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Rosette Wide 135 - First Light!, Martin Palenik

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