JUPITER-3 1 : 1.5 F=5cm

Focal length: 50mm
Mount: Contax rf
Aperture: F 1.5 - F 22
Min focus distance: 0.90m
Length (see*): 26mm [+ 19/25mm for the adapter]

Diameter: 46mm
Weight: 135gr.

*Contax mount is quite different. In fact it's two mounts. The inner mount has a focussing helical, so the standard lenses don't have one. The outer mount is for other lenses which have their own focussing device. Its difficult to measure. I have taken the locking pin for reference.

Some pictures:

A7 and the lens.

The grip is a HorusBennu grip attached to a Manfrotto 200PL style quick release plate, a special plate made by HorusBennu for their grips. It allows you to use the camera, with the grip attached, on a Manfrotto RC2 Rapid Connect Adapter.

Sample pictures: ISO 320.

You may click on the sample image (except closest focus) for full resolution. The full resolution image opens in a new window,
so you can keep it open for comparison. Focus is on the satellite dish to the right of the big solar panel near the center of the photo.

F 1.5.

F 2.

F 4.

F 16.

F 22.

Closest focus  is 85cm from outermost edge of the lens, F 8. Focus on the program wheel of the camera.

The performance of this Contax mount lens is fine, although this is an older lens which can be found for decent prices. Wide open it's o.k. for an old F 1.5 lens, there is some halo. Stopped down it's sharper, the halo disappears already at F 2, but it remains softer towards the edges. The lens has no close focussing capablities. It is relatively small and lightweight, particularly for a F 1.5 lens. A nice lens which offers 2 usable stops more than standard.

The Contax rf mount adapter is difficult to find and sometimes expensive, but Contax mount lenses are often much cheaper than their M39 versions. This one was not expensive and I already had the adapter. Otherwise I would have bought the M39 version.