I've always used either a 40mm or 50mm. But then, this is not my field. If you want something a little long and modestly priced take a look at the M or A 100/2.8 offerings. The M is just a little over $100, and not too much more for the A100/2.8
Sincerely, Collin ________________________________________________________________ Sent via the WebMail system at mail.safe-t.net