Here is sim result for ZM28 I've just done. Could this help you?
Fred Miranda wrote:
Question: Is the ZM 28/2.8 a different beast? I tested it with a PCX 1.5m filter and was not that impressed and decided selling this combo. Perhaps I could try a different PCX with it. Optically, the ZM 28 is not as great as the ZM 25 to begin with though.
