JUPITER-12 (Contax-Kiev RF)
Functionality: excellent condition, fully functional - the lens is clean, the focus and aperture work smooth and pleasant. The diaphragm blades are dry, there is no excess lubrication.
‘JUPITER-12’ would have been copied from the German Carl Zeiis Jena Biogon 1: 2.8 f = 3.5cm. The first lenses were produced from German blanks, later the lens was counted for the domestic grade of optical glass. ‘JUPITER-12’ is the most magnificent Soviet wide-angle lens for rangefinder cameras.
JUPITER-12 2.8 / 35 is interesting primarily because it is not a retro-focus wide-angle lens. The distance from the back element to the focal plane is much smaller than its focal length. All lenses for full-length cameras whose focal length is less than 40 mm are retro-focus. Non-retro-focus lenses such as this JUPITER-12 2.8 / 35 are believed to have certain advantages: compact size and a fairly simple optical design.
Focusing is performed by moving the entire lens block. The focus ring rotates approximately 300 degrees. Focusing is smooth, while focusing, the front lens rotates. There is a scale with a focusing distance in meters. The minimum focusing distance is as much as 90 cm, and the maximum magnification ratio is approximately 1:24.
The depth of field is available for F / 2.8, 4, 5.6, 8, 11, 16, 22. The depth of field for F / 22 is so large and the focus ring travel is so small that the depth of field at this value occupies almost the entire frame of the casing - two marks for F / 22 stand side by side.
The diaphragm is adjustable by the inner ring. The aperture ring sets any value from F / 2.8 to F / 22. The aperture value scale is shown for F / 2.8, 4, 5.6, 8, 11, 16, 22. Aperture consists of only five blades.
The lens is quite moody at work. First of all, you immediately come across the problem of working with side and back light. In backlight, the lens can very easily produce multi-colored glare, mostly similar to the shape of the aperture. Also in the frame there are constantly highlights of edges and corners, ‘rainbows’ and colored stripes.
The sharpness in the center of the frame is quite adequate even at F / 2.8, but the edges and corners of the frame at F / 2.8 are very, very weak. There may be a loss in image quality, including sharpness at the edges and corners, due to the color shift. Be that as it may, but the sharpness in the corners returns to normal only after closing the aperture to F / 8.0. At F / 11-F / 16, the lens gives good sharpness over the entire field of the frame.
But with regard to distortion - then everything is fine. In addition, the lens has a nice boke and, in general, a nice picture.
I give a full guarantee of the originality of the lot and its description. Your package will be very well and very securely packed. Carrier UkrPost. The package tracking window is located at this link: http: http://uacargo.com.ua/track/ukrposhta#code= Insert the track number and see where the package is. Delivery time is due to the fact that Ukraine is not in the EU zone - from a week to four. If you buy two or more lots and combine them into one package - you will be guaranteed to receive a GIFT that matches the theme of your purchase, but at my discretion.
- Multiple main devices
- Model/ type nr
- JUPITER-12 (Contax-Kiev RF) 1972. USSR.
- Object/device type
- Good (used & in working condition with visible signs of use)
- No. of main devices
- Lens Mount Type
- Contax RF / Kiev RF
- In working order