Re: zeiss vs kowa
A couple things I like about the Swarovski and the large focal ring (good when wearing gloves & fine adjustments) and the eye relief has a knob you can turn in or turn out as needed to increase or decrease eye relief. I wear glasses so that's a factor. If you wear glasses and look through many scopes at higher power, much of the field of view is gone without enough eye relief. Kowa has an eye relief of 11 to 18mm which may be a little tight at higher powers if you wear glasses. The new modular Swar scopes are over double the price of a Kowa which makes them way out of reach for me but the discontinued models/price puts them both in a similar price class for now. They're both great scopes. Haven't looked through the Zeiss so I can't comment on that.