M1 The Crab Nebula (180 sec f/7 unguided)
Posted: Tue Nov 17, 2020 2:43 pm
M1 The Crab Nebula
Getting to know the scope and mount better and better: I'm now able to do unguided, 180 second exposures with the small FOV of the Zwo ASI385MC uncooled planetary camera The ASI294MC Pro is sadly still not back.
Also getting to know SiriL better and better. The Photometric Color Calibration especially is cool and useful: besides the color calibration, it provides also info like the actual focal length (used the reducer) of 1471 mm (makes it theoretical f/7), resolution of 0.526 arcsec/px and a FOV of 16' 57.90" x 09' 36.25".
It is visible that the ASI385MC is not really made for DSO: I know it is well focused but because of the "fatter" stars, it looks out of focus for me. But all in all I am very happy with the result.
The Crab Nebula is one of the bigger objects I really wanted to capture and really I love it. Will be back at it once the cooled camera is back so I can capture it in more detail.
The Netherlands, Bortle 7/8
Meade LX200 8" f/10 ACF OTA
Ioptron CEM25EC mount (no guiding)
Optolong L-Pro filter
Optec Lepus Standard 0.62x reducer
Zwo ASI385MC planetary camera
Captured with SharpCap Pro
40 x 180 sec / Gain 100 / Offset 15 / White balance R50/B50
Stacked in DeepSkyStacker
40 lights / 20 darks / 100 flats / 100 darkflats
Processed in SiriL 0.99.6 (1.0.0 beta2) and Photoshop
SiriL: background extraction, photometric color calibration
Photoshop: levels, curves, RGB alignment, reduce noise, contrast enhancement.
Getting to know the scope and mount better and better: I'm now able to do unguided, 180 second exposures with the small FOV of the Zwo ASI385MC uncooled planetary camera The ASI294MC Pro is sadly still not back.
Also getting to know SiriL better and better. The Photometric Color Calibration especially is cool and useful: besides the color calibration, it provides also info like the actual focal length (used the reducer) of 1471 mm (makes it theoretical f/7), resolution of 0.526 arcsec/px and a FOV of 16' 57.90" x 09' 36.25".
It is visible that the ASI385MC is not really made for DSO: I know it is well focused but because of the "fatter" stars, it looks out of focus for me. But all in all I am very happy with the result.
The Crab Nebula is one of the bigger objects I really wanted to capture and really I love it. Will be back at it once the cooled camera is back so I can capture it in more detail.
The Netherlands, Bortle 7/8
Meade LX200 8" f/10 ACF OTA
Ioptron CEM25EC mount (no guiding)
Optolong L-Pro filter
Optec Lepus Standard 0.62x reducer
Zwo ASI385MC planetary camera
Captured with SharpCap Pro
40 x 180 sec / Gain 100 / Offset 15 / White balance R50/B50
Stacked in DeepSkyStacker
40 lights / 20 darks / 100 flats / 100 darkflats
Processed in SiriL 0.99.6 (1.0.0 beta2) and Photoshop
SiriL: background extraction, photometric color calibration
Photoshop: levels, curves, RGB alignment, reduce noise, contrast enhancement.