I bought KONICA HEXANON AR 35mm F2.8 Lens from ebay for a song (INR 2000).
This is not a technical lens review. So I will just state what I observe from my (layman's) point of view.
The copy that I have is Made in Japan with serial no. 7160623.
The diameter of the filter thread is Ø55mm.
It has 6 bade aperture blades.
It is solid all metal construction. The focus ring is tad hard in my copy.
The widest Aperture is f/2.8 and the smallest is f/16.
The lens locks at EE which is Orange in colour and it is f/16 actually.
I'm not sure if it is multi-coated since it is not mentioned o the lens but it controls the flare very well.
All the photos are taken with the lens without any Photo editing. Photos resized in Adobe Photoshop CS6.
The lens gives super smooth and creamy bokeh. Also the sharpness and contrast is good overall. The colour reproduction is also good (will vary according to camera sensors too).
It may give different and even better production in fullframe and APSC cameras. I have used it in Olympus E-PL2 and it gives a focal length of 70mm with the camera.
Most of the Photos are taken at widest f/2.8 and rest in f/.5.6