Tokina Opera AF 16-28mm FX f/2.8 FF Lens for Canon EF Real-time Tracking AF Celestron has reinvented the Dobsonian

Celestron has reinvented the Dobsonian telescope with StarSense Explorer—the first Dobsonian that uses your smartphone to analyze the night sky and calculate its position in real-time

8 aperture opens up a world of beautiful prime-lens bokeh

purse or bag for wherever you may take it

and fine-tune overhead or streaming setups - all from your smartphone

Tokina Opera AF 16-28mm FX f/2.8 FF Lens for Canon EF Real-time Tracking AF Celestron has reinvented the DobsonianThe Tokina opera 16 28mm f 2. 8 FF is the perfect super wide angle zoom lens for photographers who specialize in landscape, architecture, documentary, environmental portraits, and night sky image captures. With a constant f 2. 8 aperture throughout the entire zoom range, the lens provides excellent sharpness and improved contrast suitable to todays high resolution cameras. The lens uses an improved auto focus system for fast and accurate AF and