Summary: I bought the 10x40 version as a support to my Carl Zeiss that I have used for many decades - aging I wanted larger magnification but modern Zeiss are well ouside my price range as a retired person.My new Vanguard bins give a simular quality, to my eyes, of image to my old porro bins and are confortable to useTo me that reads good purchase.However the case is too small to put the bins in with the very nice strap attached to the Spirit 10x40 bins
Summary: Perfect Bins for birdwatching especially in low light thanks to the ED glass in the optics. Ideal 1st upgrade for bins - roof design makes them more compact. Lightweight but well constructed - long eye relief so you can use them for a long period of time. Large centre focus wheel with fast focus from near to far. Optics amazing for bins of this price. I liked the comfort strap that can be detached and transferred to the carry case.
Pros: Durable, Great Optics, Large Focus Wheel, Lightweight