----- Original Message ----- From: "Peter Hancock" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Tuesday, March 21, 2006 12:16 PM Subject: EOS to filter or not...
As a postscript to the recent thread on whether to put filters on by default, I just tested my 100-400L with and without the rather ordinary Jessops filter that I got with it. Not much at 100, but at 400 there is a visible reduction in resolution and contrast. I'll try again after I've given it a really good clean :-) Peter ________________________________________ Peter, Long focus lenses are quite critical about the quality of glass used as a filter. Some years ago I was unable to focus on infinty with my 300 f4.5 - simply because the so-called filter was acting as a weak close-up lens with a focal length of round 20m. Removing it, or changing to a decent Hoya allowed focus to infinity, and I didn't notice any degradation in quality (with the Hoya fitted). Malcolm Milton Keynes, UK http://www.megalith.freeserve.co.uk/oddimage.htm * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
