Hi, Stephen. The area of the filter is not the limiting factor for Cokin. The diameter of the opening in the holder is. It is 75mm across. That said, I have used Cokin P filters on Sigma 70-200/2.8, FA*400/5.6 and 645A*300/4 without any vignetting. So with tele lenses, 77mm lens diameter is not a problem.
But it would be with wide angles. The Hitec system is better suited for wide angles with large front elements. However, it's more tricky to handle those larger filters. Cheers, Jostein ----------------------------- Pictures at: http://oksne.net ----------------------------- ----- Original Message ----- From: "Stephen Moore" <[EMAIL PROTECTED]> To: "Pentax List" <[EMAIL PROTECTED]> Sent: Wednesday, September 03, 2003 6:03 PM Subject: Rectangular filters > > To those who've had experience with these things -- > > At 84mm, is the Cokin P system likely to vignette > if used with lenses having 77mm front elements? > Or do I need to be thinking about the Hitech-size > systems instead? > > All help appreciated > > -- Stephen > >
