[rollei_list] Re: OT: 35mm RF (Voigtlander Bessa)
- From: Marc James Small <msmall@xxxxxxxxxxxx>
- To: rollei_list@xxxxxxxxxxxxx
- Date: Wed, 19 Apr 2006 21:28:23 -0400
At 05:52 PM 4/19/06 -0700, Richard Knoppow wrote:
> There is a little more to it. Its the base line plus
>whatever magnification there is in the viewer. Leica thread
>mount cameras have a 2X telescope in the rangefinder so the
>effective baselind of the rangefinder is doubled. Cameras
>like the Ektra and Contax, which have the rangefinder image
>combined with the viewfinder, can not have telescopes so
>must have a physically longer rangefinder baseline for the
>same focus sensitivity.
Absolutely right, Richard. This table will probably get mushed up in the
sending, but here goes:
Camera real baseline magnification
effective baseline
early Contax I 103mm 0.9X? 92.7mm?
later Contax I 93mm 0.9X? 83.7mm?
Contax II/III 93mm 0.75X 69.75mm
Contax IIa/IIIa 73mm 0.66X
48.18mm
Leica II 38mm 1.0X
38mm
Leica III - IIIg 38mm 1.5X
57mm
Leica IV 60mm 0.9X 54mm
Leica M3 69.25mm 0.92X 63.71mm
Leica M2/M4/M6 69.25mm 0.72X 49.86mm
Leica M6J & M6HM 69.25mm 0.85X 58.86mm
Kodak Ektra 104.775mm 2.2X 231mm
Kodak Retina RF ? ? ?
Voigtländer Prominent 40mm? 0.55X? 22mm?
Zeiss Jena Werra III/IV 50.0mm? 0.75X? 37.5mm?
The Ektra did have a 2.2X RF which gave it the incredible EBL of 231mm. I
ought to finish this list off by at least putting in the Retina IIIc data,
as I have a couple sitting across the room from me, though I didn't when I
compiled this list in the middle 1990's.
Marc
msmall@xxxxxxxxxxxx
Cha robh bàs fir gun ghràs fir!
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