Focus point with narrow band LRGBHOS Baader filters and filter wheel on 183M with Altair Lightweight 1.0 field flattener and Sky Watcher 80mm Equinox OTA
As found tonight, using William Optics acrylic Bahtinov mask.
Note the t2-extension tubes required to make the Tele Vue 14mm Radian eyepiece in the finder port of the TS-Optics OAG/flip mirror par-focal with the camera. This number of extension tubes means the eyepiece has to be pulled out slightly but when I tried next size up on one of extension tubes then eyepiece could not obtain par-focality.
Processed version of my B&W photo M42 Orion Nebula from 4/1/2020 – lights and darks – I didn’t have any flats to hand.
This image has been taken with ca. 30 light frames only 5 secs long, showing how much more sensitive the Altair 183M mono camera is than my QHY10 one shot colour camera!
- Altair 183M mono camera.
- Sky Watcher Equinox Pro 80mm OTA.
- EQ6 mount.
- Astro Photography Tools (APT) software to take photos, Nebulosity 4 software to stack photos and some early processing, GIMP to do further processing.
This post follows on from previous post below:
I have taken my first ever image of M42 tonight – using my new 183M camera
Due to problems with balance of the cameras on the scope I was limited to 20 sec exposures tonight (I just replaced QHY10 with 183M which did not work re: balance!)
So this is a stretched single frame without calibration frames.
Note that data from multiple sub-frames for above image was processed and published on this blog on 8/1/2020 – to view, click below: