We have a soft-spot for refractors and this is one of our favourites. This model comes with a really nice quality 102mm aperture refracting optical tube. It uses high quality glass to deliver more than 20 times more light than the human eye will see on its own. To help you get the most of this scope we've bundled it with a 5mm eyepiece that will bring the magnification up to 130x for high quality planetary views and zooming in on the moon, a nice set of filters to add contrast to those bright solar system objects, and an excellent guide to the 110 Messier objects that this scope will show you. This is an excellent telescope and the workbook will keep you busy year round exploring the wonders of the night sky.