What is this? http://cgi.ebay.com/LOUPE-PHOTOMETER-ROLLEI-SL66-FOR-CAMERA-HASSELBLAD_W0QQi temZ7555134967 Is it meant for use on a Hassy or a Rollei SL66? What does it do? I believe in using a loupe with the SL66 but this seems to do more. Dan --- Rollei List - Post to rollei_list@xxxxxxxxxxxxx - Subscribe at rollei_list-request@xxxxxxxxxxxxx with 'subscribe' in the subject field OR by logging into www.freelists.org - Unsubscribe at rollei_list-request@xxxxxxxxxxxxx with 'unsubscribe' in the subject field OR by logging into www.freelists.org - Online, searchable archives are available at //www.freelists.org/archives/rollei_list