I can't agree with Colin that the original Symmars are only suitable for "moody" low contrast photography. I've used the 135, 150, 180 and the 210. All were excellent and to discover sharpness differences (relative to APO's) I had to construct a test which didn't relate to anything I actually use a lens for. If you have the sun in your picture or just off axis, yes, the multicoated ones are better, of course. You pay for that. Differences in contrast in other situations are not so dramatic and often are not noticeable.
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