My Swift Osprey binoculars are over 20 years old and were in need of replacement. Having researched the internet thouroughly, and reading many reviews, I decided to go for the Pentax DCF SPs. I found them advertised, through Amazon, at a very low price and went for it. These binoculars are superb. They seem to make colours brighter than reality, even in poor light, .....important for bird watching. I would say, at the price and for colour and clarity, they compare favourably with my Swarovski scope.....enough said!