The following are the top recommendations based on the angled design (preferable for astronomy), specification, customer experiences, reviews, cost, and other factors:
Celestron Regal M2 100ED (Editors Choice)
The Celestron Regal M2 100ED 3 is widely considered the best choice for a variety of reasons. It is built with Fully-Multicoated ED Objective Lenses meaning it has reduced chromatic aberration (failure to focus), higher accuracy color reproduction, and has increased resolution and contrast.
This compliments the 100mm (3.94″ Aperture) and 22 – 67x Magnification that this powerful spotting scope provides.
One of the other standout features of the Regal M2 is the Magnesium Alloy Body which is strong and durable, and lighter weight than traditional aluminum alloy housings.
It is also fully waterproof and fog-proof and has an ergonomic dual-speed focusing mechanism.
Plus a range of additional accessories are included: padded view-through case, objective cover, eyepiece cover, storage covers for the eyepiece and eyepiece port, T-mount adapter, and a cleaning cloth.
This is the standout winner and if you can afford it, this is the scope to get. It is in many ways a superb telescope in its own right.
This is the spotting scope I decided to purchase and now own (picture above) and I can only thoroughly recommend it.
✔️ Adjustable magnification, giving you a wide field of view for general viewing and detailed up-close viewing when needed.
✔️ ED Objective Lenses and XLT Coatings (Fully Multi-Coated Optics):
✔️ Strong and Durable Magnesium Alloy Framework.
✔️ Rotating Tripod mount with Detents – allows you to position the eyepiece at the most comfortable viewing angle.