Originally posted by RioRico Same glass. The A is worth about 2x-3x as much as the K.
Really? I got my A50 1.2 for a bit more than 400€ on 'bay and I don't think I ever saw the K going for less than 300. Is the bay (Germany) strange here or do I misremember?
As to the original question: The A is simply stunning, one of my three favourite lenses, I would be curious if anybody compared it to it's older brother. While the formula for both lenses is the same, the coatings should be different, shouldn't they?