You are welcome Robert. I think UV and Skylight filters and the combo are still significant for color photography specially under some conditions in spite of film improvements. Digital cameras sensors are also UV sensitives but you can handle the blueish cast via white balance and/or software, however several of them are infrared rays sensitive too and need a special filter to avoid the effect, regular film does not have this problem. Carlos 2011/11/6 Robert Meier <robertmeier@xxxxxxxxx>: > Carlos, > > Thanks very much. This is good, useful information. --- 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