Konica's AR long tele — the 300mm f/4.5 Hexanon for distant wildlife and sport.
The Konica Hexanon AR 300mm f/4.5 was a long telephoto prime for the Konica AR bayonet on the Autoreflex system. At 300mm it was among the longest lenses in the AR line, made for distant wildlife, field sports and other subjects out of reach of shorter teles.
This is a manual-focus Konica AR lens with a 300mm focal length and a maximum aperture of f/4.5. It is a long telephoto prime with a very narrow field and strong compression. Optical construction, filter thread and minimum focus distance are not verified here and are left out rather than guessed.
A 300mm reaches well into the distance, filling the frame with far-off subjects and compressing perspective heavily, which suits wildlife and field sports. At this focal length careful support and higher shutter speeds matter, and stopping down a little tightens up critical sharpness.
The 300mm Hexanon is a scarcer long tele in the AR range and sells for more than the shorter primes. Inspect the elements for haze, fungus and coating wear, confirm the aperture is dry, and check the long helicoid feel. It adapts to mirrorless via an AR adapter, best used on a tripod or monopod given its length.