Uploaded 4-Mar-18
Taken 3-Mar-18
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22 of 27 photos
Photo Info

Dimensions1280 x 800
Original file size838 KB
Image typeJPEG
Color spaceUncalibrated
Date modified4-Mar-18 03:55
Orion Nebula with 2 Zones of Exposure

Orion Nebula with 2 Zones of Exposure

This is a snapshot from a testing session with the Star Adventurer tracking mount with a Polemaster polar alignment camera. Although I have had this tool for some time this was the first time that I have been able to use it. It took a number of iterations but with Kurt's help we were able to navigate the software and adjust the mount to achieve the 30 second light exposures.

I split the exposures into two zones, one with 30 second exposures and the other for the central area with 4 second exposures.

With only 6 light frames for each zone there is a fair bit of noise using ISO 3200. Future shots should benefit with more light frames.

After examining the individual frames more carefully balancing of the optical train would have given even better results. I'm happy with this first try. Polar alignment should take less than 5 minutes.

Lens: Nikkor 300/4 with TC 1.4E-II
Camera: Canon 60da
Sensor: ISO 3200
Tracking Mount: Star Adventurer
Polar Alignment: PoleMaster
Exposure of Lights Zone 1: 30 seconds
Exposure of Lights Zone 2: 4 seconds
Darks 6; Flats 6; Lights 6
Stacking: Maxim DL Pro 6
Finishing: Adobe Photoshop CC with Alien Skin (Fuji Film Stock)