The Celestron Luminos 2″ 2.5x Barlow Lens is a nice, 4-element, multi-coated Barlow lens. This is a quality built product with a solid fit and finish. This Barlow lens comes with a 1.25″ adapter so you can use 1.25″ eyepieces or 2″ eyepieces with it, and utilizes brass compression rings, so that eyepieces or accessories aren’t marred with use.
This Barlow lens works very well for planetary imaging. The multi-coatings keep the image bright, and the apochromatic design helps keeps the image well color-corrected.
Another great thing about this Barlow lens is its price. Most 2″, multi-coated Barlow lenses are very expensive. The Celestron Luminos 2″ 2.5x Barlow lens rivals the quality of others while being a fraction of their price.