The ATS-80 20-60x80mm HD Spotting Scope with Eyepiece (Angled Viewing) from Swarovski is a rugged yet refined scope from one of the world's most renowned optics manufacturers. The 80mm configuration is robust yet relatively lightweight, and is suited to a wide range of glassing needs, including those of long-range hunters and bird-watchers. Fluoride-containing, premium-glass lenses efficiently transmit all wavelengths of visible light for bright images that are color faithful, crisp, and rich with detail. Coatings on all lenses minimize glare while maximizing contrast, phase-corrected prisms ensure that images are rendered with clarity, and field-flattener lens technology eliminates geometric optical distortion throughout the zoom range. And because life in the field can be messy, the SWAROCLEAN lens coating makes it easier to clean away dirt such as water marks, insect repellents, or tree resin. The included 20-60x eyepiece features a wide viewing angle and generous eye relief. The eyepiece quickly attaches to and detaches from the objective assembly's bayonet mount for easy disassembly, transportation, and storage.

The nitrogen-purged, O-ring sealed, and rubber-armored housing ensure water, fog, and shockproof performance in almost any environment. A removable sighting aid helps in target acquisition when a camera is mounted to the eyepiece.

Rated 5 out of 5 by Ben from Impressive Optics I bought this scope to bird watch on the recommendation of a professional bird guide. I was looking for optics that would be light, compact, provide a bright image, with resolution that would reveal fine feather detail. This scope provides all of that and more. I first purchased the 65mm scope but returned it for the 80mm and am not sorry (an exchange that was easily accomplished through B&H). The 80mm is noticeably brighter and provides slightly higher resolution at the higher powers with minimal weight and bulk. I have been impressed with both the brightness and the resolution of this scope. Because of the weather, I have used it to watch birds through a double-paned storm door.

Even with that, I have been blown away by the fine feather detail I am able to see. I look forward to the views I will get outside without the intervening window glass. The focus is smooth, convenient, easy to use, and is fast.

The sunshade extends easily and yet is firm enough to stay in place. The green rubber body armor seems durable and is attractive.

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The zoom eyepiece works smoothly. The tethered eyepiece cover is also a nice touch.

Also, the angled viewing is convenient and comfortable. The spotting device on the side of the scope makes it easy to find an object. In short, I would recommend this scope without reservation!