After the modernization of the eyecups, the use of attachments for lenses, many shortcomings were corrected. I had to sacrifice brightness for the sake of contrast and sharpness. It has become much more pleasant to use, whitishness has decreased in difficult lighting conditions, sharpness and contrast have increased. In general, the picture is clear, with correct color reproduction, with good sharpness throughout the entire focus range. Chromatic aberrations are average (birds turn into red-green parrots along the edge :) but in the center they are almost invisible, there are practically no purple halos, pincushion distortion within 5 percent which is very good, coma and astigmatism are well corrected in the central region (50 percent of the area) of the star in beautiful, neat sparks in this zone of vision (they become small comets along the edge, in the blur zone). It is pleasant to look at the moon, everything is clear and sharp, there is a slight chromatism along the edge of the disk. But it was problematic to watch from the hands tied to a photo tripod. All of the above is after the upgrade. Value for money in 2022 for C grade. Long-term observation is limited more by the stamina of your hands than your eyes. The rating is reduced for the price-quality ratio and the shortcomings, for $ 140 that it is sold on Amazon is a good option, provided that you get a normal one with good alignment. The mistake when choosing is that you focus on the price in 2022 and expect quality, because its price is 350-400 dollars. For that kind of money on Amazon, you could buy a much better quality binoculars in terms of optics and manufacturing. Among other manufacturers, there are options with slightly worse image quality but at a price 2 times less.
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