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The Horsehead Nebula in Orion. This is one of the first deep space objects I saw in a book as a child and it captured my imagination - I’ve been intrigued by this incredible Universe ever since. As a small child, I’d have been blown away to think that 40 years later, I’d capture this image from my own backyard. I've only been astroimaging for less than a year so would appreciate any constructive comments/ criticism. Higher resolution version at: https://astrob.in/393553/0/
I tried something different with this image as I was severely restricted by time and conditions - battling last months full moon and a small cloud free window of about two hours each evening where the Horsehead appeared between some large trees and the edge of our house!
I took mainly Ha because of the moonlight but then blended in some Lum and Blue data to one master image. This brought out more detail in some of the nebulosity. The resulting Master was then processed through the red channel only in PixInsight and Photoshop:
Ha 36 x 240s
Lum 25 x 60s
Blue 20 x 60s
Scope: Altair 130ED Triplet
Mount: Celestron CGX
I own a Vixen ED-80 refractor which is used with a custom focuser by Telescope Service.
A Celestron f/6 SCT reducer corrector did not provide decent images either because it is not appropriate or because I did not maintain the correct distance.
I am thinking of buying the Sky-Watcher .85x Reducer/Flattener instead, as it is made for similar ED80 telescopes.
I do not know what is the correct distance of the SkyWatcher reducer for my setup and more important, I do not know if it will focus with the custom TS focuser.
Do you have any similar setup that you have used successfully?
I have an EQ5 telescope mount which i use for astrophotography. I have modified it with a motorised RA axis using a bipolar stepper motor - my thread for the build is here .
I want to expand the mount's tracking ability by motorising the DEC axis and using a guide scope/camera. I generally use the mount in fairly remote locations so would like to use a raspberry Pi for portability.
I understand that I'll need to use a Raspberry Pi Camera Module for the guide camera.
The capability I want is:
1. guide the mount along RA and DEC axes using a guide star as feedback
2. track the mount using the RA axis only, and if possible continuously take 20-30 second exposures on the guide camera (this functionality is optional, but would assist in polar alignment of the mount)
I don't want any GOTO capability. I am very new to RPi and need some help:
- do I need to write code for this, or is there existing programming available for what I want to do?
- is it possible to avoid the use of screens (in the field)? My preferred option would be to flick a switch to start and stop the guiding, with another switch for alignment mode (or something simple like this).
- do I need to use any particular stepper motors/drivers for raspberry Pi? I'm using a bipolar stepper motor running quarter steps, with an A4988 stepper driver
- is the RPi 3 Model B+ the unit I should buy?
I am going to upgrade to the skywatcher 250/1200 pds telescope and i can't decide which mount i should get.
The main (only) purpose is astrophtography and i am considering either the eq6-r- pro or the cem60
The cem60 can carry more weight but is also more expensive, my inner debate now is about if it is worth it
What's you take on it?
Im having issues regarding dew during colder nights while imaging. I’m aware of how to solve the issue of dew forming on front elements of scopes/lenses using dew heaters, however I’m also concerned with the dew that forms on my non-weatherproof DSLR body and imaging laptop. Does anyone have any suggestions on how to combat this?