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These are not state of the art but they are very good for value/performance. The initial impression is excellent; bright, sharp and clear with good contrast. Detailed testing show a few minor imperfections, but they are relatively minor. They are not Swavorskis. There is a sweet spot very slightly below the centre where chromatic aberration, colour fringing, is negligible and resolution really very good. Above this point there is a little magenta fringing, and below a little turquoise fringing, on high contrast edges. This limits the results just a little at longer ranges, but you'll have to spend big money to get much better. Resolution is very good for about the central 60-70% of the large apparent field of view vertically, and good throughout horizontally. There is some pincushion distortion but really you have to look for it.
Build quality is really good, they feel like a premium product.
A first pair came with a soft case with an unstitching logo and were returned. The binos were fine and optical performance seems extremely sample-consistent.
Admittedly a novice here who purchased these after alot of research. I took a chance on buying these after some reviews slightly favouring another make. From a novice with a critical eye, I cannot fault the viewing experience or handling of these. I got a litte distracted from others talking of colour aberrations etc. I cannot see any such failings. Also the lack of numerals for the eyepiece adjustment.. there are 5 clear markings there. I know my setting is 1.5 to the left. One of the main deciding factors for me was the lifetime warranty. As I live in Ireland I was worried about warranty with an online purchase. Vortex have an agent here which will handle any warranty issues. This is great peace of mind for me. Some of the other Brand names did not have this facility.
These binoculars exceeded my expectations. Their light weight and smaller size means that I carry them more often than the pair they replaced. The optics are bright and sharp. Highly recommended at the price