They are built on a square tube inside like the Leica screwmount RF, and are very rugged." You set infinity with a screw under the narrow model number plate which must be removed. You cannot replace the lens with one of a different focal length and adjust the Hugo Meyer RF internally as you can with the Kalart. It's a 1961 Crown Graphic, I'd not looked into adjustmentof the Rangefinder, hower "The Hugo Meyer is not a bad Rangefinder, but it has a fixed cam, and each model of the Hugo Meyer is made for and dedicated to a specific focal length of lens. The 3rd option seems the best for the other screen, maybe with plain GVB glass on the 9x12's.Ĭomments on the Shen Hao Glass/Fresnel would be appreciated that option is quite reasonably priced, also sources for reasonably priced fresnels. The first option is ruled out as too expensive I need up to 5 screens, the 2nd may be the best for one or two cameras but there may be an issue with film plane register adding the fresnel. Adapt a Wista or Cambo screen & fresnel (to fit). There seem to be are a number of options:Ģ. The screen on the Crown Graphic came from a reputable US supplier of ground glass screens, it is slightly brighter than the original screen.
The dilemma is what glass to use that will get reasonably close to the brightness of the Wista screen on the other cameras. So in fact the difference in screen brightness is equivalent to 4 f-stops, which is highly significant. I then stopped the Sironar down until both screens had the same approx apparent brightness, that was between 16/22, checking the Tessar on the Wista I had a comparable reading of 14.7 as I'd expect with a faster lens. Using my Spotmeter & reading from an area of clear blue sky on the screen the Wista gave a reading of 14, while the Graphic was 11.4.
HUGO MEYER DEAD FULL
The Wista 54DX with the standard Wista screen & fresnel had a 150mm 5.6 Sironar at full aperture and the Crown Graphic a 150mm f4.5 Tessar (coated), and a new ground glass bought via Ebay (2½ years ago), both focussed at infinity. I have 2 5x4's sat side by side on tripods and was astonished at the differences in screen brightness, I expected a stop or so but instead its well over 3½ stops, and that's with a handicap the camera with the brighter screen had a slower lens. I also need new glass for a 10"x8" and 9x12cm camera. Recently I restored a couple of Speed/Crown Graphics, I'd intended to buy new glass but didn't get a chance on my last visit to the UK.
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