TPM Telrad Pattern Matching

Another writeup on the subject which is so trivial that it deserves a detailed explanation! How to use the Telrad properly? Many folks using it as a glorified red dot finder. Which is sad to see knowing its potential rivaling even most advanced GoTo systems... But let's start from afar with the most frequent question a beginner or a mature amateur astronomer is constantly concerned about. How to point a telescope to the invisible for naked eyes deep sky target? I mean, in a reliable way? [the write up is still in development]

Photo by Guillermo Ferla on Unsplash

There are dozens of answers. And after asking it for 40 years myself and trying what others doing to solve that problem I have finally a definite answer: the TPM.

QuInsight the Telrad successor

QuInsight is the newest telescope pointing device leveraging the collimator principle similar to the Telrad. It has been designed and manufactured in 2019 by Rob Brown. Rob has a background in Optics engineering and owns a 3D printer which he is using to produce components of Quinsight.

I believe the QuInsight design is the best thing happened to the Telrad idea in the past 40 years (since the Telrad invention).

Dob Dolly. Furniture dolly mod to carry 12" Dob.

This is a really trivial construction which I've assembled in like 15 minutes from the scrap at hands to haul my Zhumell 12" pre-assembled to the other side of the high-rise multi-apartment building I'm living in (as well as to the roof in two runs). I'm observing from home right on it. It turned to be a very sturdy, mega-convenient, and fun to use system.

I think the image is selfexplanatory but folks from one of the forums begged me to share details anyway, thus they are under the cut along with all of the benefits list.

Time left before the sunset

This is the old boy scout method of determining the time left until the sunset (or elapsed after the sunrise) "manually".

And here is how I have it criticized for my backpacking group folks:

5 Watt flashlight conversion for $5

It's not really for astronomy use but the flashlight goes into my travel duffel. A 5 watt LED star can be easily installed into this cheap diving flashlight and powered by 14500 LiPO cells at 7.4 Volt and 2400 mAh.

Mor details under the cut.

Meade ETX125 easy collimation

I have noticed that my ETX125 airy disk developed two hot spots which mean it got out of collimation a bit.

My favorite for eons Weasner website has a lot of information on that but it's mostly "don't do that yourself", "be super careful", and very little on the actual subject with quite a conflicting tips. So here is how I've done it:

What to do on a cloudy night? Or Star Chart VR!

Deprivation after just a handful of cloudy observing nights leads to... ideas. I have borrowed my Son's Gear VR headset and found a pleasant virtual world of astronomical wonders immediately surrounded me almost naturally.



StarChart is a simplistic amusement app, but the digital implementation of the starry night ambience is truly artistic. It even has its own darkness-adaptation-safe campfire! Wonderful touch. No images spoiling under the cut as the immersion is the key.