Originally posted by embedded Primes are better. But I can pull amazing things like all of a schematic seeing the pixels on the original laser inside a motor panel in a desert up using a 15-55 DAII Zoom. The 50mm FA Macro does twice as good with amazing depth. I will not buy a 18-250mm just too many compromises. The 28-200FA Pentax that appears to be better than the DA's. Saving my pennies for a 16-45 F2.8. The Zooms are really convenient for framing. The old glass is better for the money.
IT is actually f4 otherwise I'd have it.