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Very, very nice and sharp photo, Neil. But don't you think that 12.1 MP and the Swaro optical quality is the difference? BTW, we used to call the bird "bully-bully", or more correctly, bul-bul.
Ex HK'er.
Good quality glass does make a difference but distance and quality of light make a bigger difference. I don't have good light in Hong Kong most of the time so I try to get close. A lot of my digiscoping is done between 7 - 15 metres. In Florida and Australia where light quality can be very good you can get good results up to 50 metres with a good scope, but this would stretch an average scope.
Neil.