The 51mm model, in particular, is available for just $609, having previously been marked at $1,099 which is a staggering 45% off. This deal is available in all sizes (42, 45, and 51mm) but the biggest discounts are on the biggest size.

Learn more› By The Deals Team The Deals team hunts for and highlights only the best discounts on picks made by our editorial experts. As Prime Day winds down, we’ve stopped our up-to-the-minute updates to this article.

It's the last day of Amazon Prime Day and some of these deals are definitely ending tonight. Grab some new optics in time to see Saturn's rings!