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The way I do this is to use a star finder app on my phone, or Stellarium on my laptop. Once you find your target, aim your camera or telescope at the nearest bright star. If you’re using a telephoto lens, then you can make this process easier by zooming out to give you the widest field of view. You could actually use the Star Adventurer for visual astronomy, too, if you wanted. The mount can handle up to 11 pounds of gear, which means a small refractor telescope with a diagonal and eyepiece are an option. Because with the naked eye, you can only see Polaris when you look in that direction, it is fairly easy to center the North Star in the field of view of your awesome DIY Pole Finder. Both the SAM and Pro come with detailed instruction manuals which take you through how to set up your mount, its different configurations and how to polar align. You can also view these manuals as PDFs online. Final Thoughts And, of course, for those of you that want full control of the mount and with plate solving and pulse guiding (ASCOM/EQMOD), you can connect the mount to your laptop using the USB Type B port. This thing seriously feels like a miniature EQ6-R Pro. It even kind of looks like one.
The Star Adventurer GTi is also available as a mount head only, code 20326 to fit your own tripod with 3/8 fitting).The base of the mount and the connection to the tripod are solid and secure. I ran into a small issue with a stiff right Azimuth knob out of the box, but I took it all the way out, re-threaded it in straight and it’s working flawlessly now.
The tripod that comes with the GTi is much smaller and lighter than the one you would find on a full-blown equatorial mount. It’s not much to look at, but it actually feels surprisingly solid. There are some nice grippy, rubber feet on it. If you Google Brussels coordinates, you’ll find I am located at latitude 50.8° N and longitude 4° E. This is respect to the GM. Since I am at longitude 4° E and my LSTM is 15° E, I am 11° W from the LSTM, and this is the value I have to set the Time Zone Scale to.
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Earth revolves once every 24hrs (give or take), thus every 15° of longitude from the Standard Meridian of Greenwich (London) there is a LSTM for a time zone: this defines the Universal Time (UT) or Standard Time. This world map shows the different LSTM each 15° of longitude from the meridian of Greenwich and how this is correlated to the Universal Time. (Image credit: Journeynorth) You will also see some more values such as Astigmatism and Coma. Again, these are measured by the interferometer when we take measurements of the optical surface after adjustment. These are values which ideally would be at 0 but as our test optics are all curved lenses, there will always be astigmatism and coma present. The lower the number, the less of these aberations you will effectively see but with most refractors, you can buy field flatteners which will compensate for the coma anyway. The astigmatisms value is explaining the error between the symmetrical curvature of the lens. Basically, no lens will be perfectly symmetrical, the lower the astigmatism, the more symmetrical the lens surface is. Both the SAM and Pro come with detailed instruction manuals which take you through how to set up your mount, its different configurations and how to polar align. You can also view these manuals as PDFs online. Summary
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