The Kowa TSN-601 60mm Angled spotting scope represents the best ultra-compact performance scopes with interchangeable eyepieces. This model offers fully multicoated lens and nitrogen purging for waterproofed protection. This is finely crafted, exquisite pieces that'll astound you with their quality. It is entirely a matter of personal preference best determined by experience, but many feel that angled scopes offer a more comfortable position for extended viewing periods. They're usually a bit easier to share amongst multiple users of varying heights as well.