I highly doubt that pentax would have gone to the extra expense of implementing that matt for no reason. I would reinstall it. It shouldn't be that hard to mark the absolute bottom of the mount (installed on camera) and then reinstall referring to that. jco
-----Original Message----- From: Antonio Aparicio [mailto:[EMAIL PROTECTED] Sent: Wednesday, July 14, 2004 9:03 AM To: [EMAIL PROTECTED] Subject: SMCP (orignal K mount) lenses: black letterbox window at rear Hello, Can anyone tell me how important the matt black metalic letterbox is on k mount fixed lenght lenses, as one seems to have come unstuck on my 135/2.5 and was wondering if it was necessary at all to stick it back on (not an easy job as I would have to somehow get it perfectly horizontal again). I notice that the earlier M42 mount versions of this lens didnt have the letterbox .. Antonio
