I have had a 635 for many years. The 3-element Yashicor is all right, though not quite as good as the 4-element Yashinon. The camera is worth more if it comes with the 6-piece 135 film adaptor set which could be interesting to use and turn the lens into a very adequate portrait lens. The lens has another characteristic, and no offence is intended, darker coloured skin tones tend to shine out. Therefore, it is well loved by many of my friends of the Indian origin for this high contrast effect, making their smile more apparent on film! The same cannot be achieved with Rolleiflexes. All in all, the 635 is a more than adequate camera provided it does not cost too much.