Spoke to CZ. The 450 IR is NOT supported and is considered to be on the "sunset list". The 450 Plus IR IS supported. I used Igor Gaufmann of National Instrument Corp. numerous times and was always happy with his work. He has a good "parts house". jeremy p. pantell --- On Fri, 9/9/11, Fernando Corrada <fcorrada@xxxxxxxxxxx> wrote: From: Fernando Corrada <fcorrada@xxxxxxxxxxx> Subject: [optimal] Zeiss FF450 service/repair To: "Optimal" <optimal@xxxxxxxxxxxxx> Date: Friday, September 9, 2011, 12:47 PM Hi Optimalers. I use a Zeiss FF450IR and lately the keyboard has been freezing and the mirror seems to be a little slow to return. I called Zeiss today and they told me that since last Feb they do not service the FF450's. I was ver dissapointed to say the least! I asked them for guidance about who/where I could get the camera serviced and they told me "to google it". Wonderful idea!! A few years back Zeiss replaced the springs that assist the mirror up-down movement. Anyone has spare springs? I will do the replacement myself if necessary. Any recommendations for who can service this camera? Thank you very much. Fernando