if you're talking high quality, you are talking big bucks. the small amount of Novoflex i have read says excellent for their time, but superceded by today's lenses. so i would have to say it depends on your budget. i have a FA* 400/5.6 and an A* 400/2.8 which is mostly used with the 1.7AF adapter. both are used on the *istD. i think that a 400 alone is OK only when working from a blind, very acclimated birds, or with big birds at moderate distances. a 600 or longer would be better. this is assuming publication quality. if you are just interested for fun, you don't need as long. an alternative to the 600 is a very good spotting scope, but at a large amount of light loss. think f11-f13 range for most scopes.
Herb... ----- Original Message ----- From: "Carlos Royo" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Sunday, January 16, 2005 4:25 PM Subject: Novoflex tele lenses > As some people around here are much more knowledgeable than me about > long lenses, I would like to know their thoughts about the performance > of the follow focus tele lenses made by Novoflex. I have only used a > Sigma 400 5.6 AF, which I sold to a list member years ago, and the > excellent F* 300 mm. 4.5 > I still keep the F* 300 mm. but it is a short lens for birding and other > kind of nature photography. If I ever get an *istD or other Pentax DSLR, > perhaps the crop factor will allow a narrower FOV, but I will surely > need a longer lens.
