Many thanks Carlos! Regards, Jerry --- Carlos Manuel Freaza <cmfreaza@xxxxxxxxxxxx> wrote: > I think John is right, it must be a R1 color > conversion filter because only the Rolleiflex color > conversion filters have double bayonet (male and > female). The R1 filters are recommended to eliminate > blue excess using five element lenses and it also was > recommended to use with four elements lenses -Xenar > and Tessar- for color photography in general due to > this filter has an additional UV effect regarding the > four elements lenses (The UV effect is not perceptible > for five elements lenses according F&H technical > brochures). > The Rolleiflex Infrared filter is included within > filters for B&W photography, one of the reasons to use > this filter with Infra Red films is to compensate the > different focusing distance due to the infrared rays. > > All the best > Carlos > > > --- John Wild <JWild@xxxxxxxxxxxxxxxxxxxxxx> > escribió: > > > Jerry, > > > > If it was an Infra Red filter it would be almost > > black (very dark red)so > > as to only pass infra red light. The inscription > > would have been > > "Infrarot" . I suspect it is a Rollei warm-up > > (colour conversion for > > colour film) filter "R1" also available in strengths > > R1.5, R2, R5, R11. > > These had a female bayonet fitting on the front so > > that an additional > > filter could be attached as required. Similar > > filters in Blue were > > available and as a cased set. > > > > John > > > > -----Original Message----- > > From: rollei_list-bounce@xxxxxxxxxxxxx > > [mailto:rollei_list-bounce@xxxxxxxxxxxxx] On Behalf > > Of Jerry Friedman > > Sent: 22 June 2006 13:31 > > To: rollei_list@xxxxxxxxxxxxx > > Subject: [rollei_list] Re: Filter identification > > question > > > > > > Hi! > > > > I hope someone can help me identify a Rollei Bay III > > filter that I have > > with the letters I R on it. It is clear and has bay > > III fittings on both > > sides (male on onme end, female on the other). > > Should I assume this is > > an infra-red filter? How is it used and what effect > > would it have being > > used with black and white film? > > > > Many thanks, Jerry F. > > > > > > --- > > 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 > > > > > > > > > > > ___________________________________________________________ > 1GB gratis, Antivirus y Antispam > Correo Yahoo!, el mejor correo web del mundo > http://correo.yahoo.com.ar > > --- > 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 > > __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com --- 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