I believe you are correct. However, some of the early ones don't have the" L in a circle" mark , which Kodak used to ID its coated lenses ( "L" = Lumenized).
----- Original Message ----- From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
To: <rollei_list@xxxxxxxxxxxxx> Sent: Wednesday, June 06, 2007 6:31 PM Subject: [rollei_list] Re: features of Medalist
----- Original Message ----- From: "Jerry Laderberg" <jerry@xxxxxxxxxxx>To: <rollei_list@xxxxxxxxxxxxx> Sent: Wednesday, June 06, 2007 5:39 AM Subject: [rollei_list] features of MedalistThe RF was one of its best features, being the accurate split-field military type and having a large separate viewing " port". Its lens was another good feature, being a 5 element rare earth design. The only obvious difference between the model I & II is that the I has a self-timer, whereas the II has flash sync instead. The very earliest examples of the I are not coated.Actually, they are coated but the coating is of an early type which could be wiped off so it was applied only to inside surfaces. Kodak used this early coating on the Medalist lens, most of the lenses for the Ektra camera and the Eastman Ektar series (which became the Commercial Ektar when hard coated). These may look uncoated because the ourside surfaces will have bright reflections. I don't know for certain how this early coating was deposited. It may have been an early vacuum coating which was not baked in the vacuum but I suspect it was a chemical deposition process. Such processes are described in the literature of the late 1930's. The process of baking the coatings in the vacuum chamber was discovered in the U.S. during WW-2. The earlier process was to deposit the coating and then bake the coated elements in a seperate oven. At some point someone thought of mounting heating elements inside the vacuum chamber and baking there while the vacuum was still on. This resulted in much better bonding of the coating to the glass and is the way its still done.--- Richard Knoppow Los Angeles, CA, USA dickburk@xxxxxxxxxxxxx --- 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
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