I'm new in the hobby and wanted to upgrade my 80 mm refractor with better eyepieces than the ones it came with (10 and 25 mm). After reading about eyepieces, I found this zoom as the best option, it is like having 10 different high-quality eyepieces for the price of one. with this eyepiece, you can enjoy planetary astronomy without spending a lot of money. The images of the moon and planets are very sharp. it has threads for filters which is very convenient for planetary observation. The thread on the eyeguard is also very convenient for connecting a T-ring and taking good pictures using the zoom magnification. This is definitely a must for beginners to start a good eyepiece collection.