bob_peters

I'm looking for an M portrait lens - and I keep seeing 90mm F4 Elmar's and 135mm Hektor's for about a quarter of the price of other M lenses. Are these lenses optically any good or are they dogs? They just seem very cheap. Example: 90mm F4 Elmar's and 135mm Hektor's seem to be less than 100 GBP. 90mm F4 Rokkor-M's are the next cheapest at 200 GBP. 90mm Voigtlander 175 GBP (screw mount) Opinions appreciated.