Tele Vue 4.0x 2 Inch Powermate
.Great quality Barlow lens!
Fast Delivery, Excellent results
I have only used this for visual of Venus and Mercury with a 21 mm ethos. I could clearly see that each planet was a crescent thru a 106mm refractor. Any movement of the scope can really be seen at that magnification. This telescope and EP combo could not be used for AP.