Tair 3 is a Russian 300mm/4.5 telephoto. I paid 100 Euro for whole photosniper outfit except Helios 44. All shot using tripod (the lens weights 1.6 kg). No processing. Zinnias, resized to 25% Detail from above, 100% crop Brick wall, resized to 25% Detail from above, 100% crop Pretty sharp but there is some color aberration. I think that my copy is about average as there are much better example photos around but also lots of complaints about horrible CA too. Exposure time was 1/160 and 1/1250.Advertisement I will dismantle mine in winter. This is a 3 lens construction and small misalignment of lenses may be responsible for CA.