The filter is also a weak lens. From the booklet "Rolleiflex. Rolleicord. The practical accessories": "The infrared filter features special compensation for focusing difference between visible and infrared portion of the spectrum. Direct ground glass focusing may be employed with full assurance of sharp pictures."/Patric From: dlp4777@xxxxxxxxxxxxxxxxxxxx: [rollei_list] Re: Newbie question about infraredDate: Sun, 25 May 2008 18:49:05 -0700To: rollei_list@xxxxxxxxxxxxx How does it compensate for the focus difference?dennisOn May 25, 2008, at 18:41, J Patric Dahlén wrote: There is a Rollei - Infrarot filter. It's very dark, and also compensates for the IR focus automatically. Try to find one in Bayonet III. Found this picture on the net:http://i23.ebayimg.com/04/i/000/d1/dd/2959_2.JPG /Patric From: surgeon24hrs@xxxxxxxxxxxxx: rollei_list@xxxxxxxxxxxxxxxxxxxx: [rollei_list] Newbie question about infraredDate: Sun, 25 May 2008 18:16:28 -0500I have an owner of 2.8F. I am fascinated by infrared B&W, and I wish to try it with my Rolleiflex. Rollei infrared film sounds like a good much.I only have hellrot filter. Is this good enough for infrared photo, or I need get somethingelse?I might be asking very primitive question but, please forgive me, I have no experience with it. I should be most grateful if you could teach me.マイクロソフトの最新次世代ブラウザIE7にMSN版ならではの便利な機能をプラス http://promotion.msn.co.jp/ie7/ Senaste resenyheterna & prisv?rda flyg till hela v?rlden! MSN Resor _________________________________________________________________ Ladda ner hela Windows Live gratis och upptäck fördelarna! http://get.live.com/