Focal length: 40mm
Mount: Exakta
Aperture: F 2.8 - F 22
Min focus distance: 0.05m (!)
Length (from flange): 39/78mm [+ 26mm for the
adapter], rear element protrudes 10mm
Diameter: 62mm
Weight: 166gr.
Some pictures:
A7 and the lens.
Lens not extended
Lens fully extended.
Sample pictures: 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 2.8.
F 8.
F 22.
Closest focus is only 7cm from
outermost
edge of the lens, F 8. Focus on
the program wheel of the camera.
This
is a very unusual lens. I had the 3.5 version in stock, it escaped
going with the
lot when I gave my Exaktas and Bessamatics away. The glass sits deep
inside (no shade necessary) and it's a real good macro lens. The 2.8
version is extremely expensive nowadays and obviously prone to glass
problems. So it took me some time to put my hands on a reasonably
priced one and I had to return several lenses to their sellers. My 2.8
version extends a lot more than my 3.5 version, so magnification goes
down to 1:1.1. This means real macro photography without additional
macro gear.
On my
A7 the lens
focusses from infinity down to less about 7cm from the filter thread.
Picture quality is soft towards the edges wide open and it's a bit difficult to focus,
between sharp and blurred are only fractions of a mm. It's o.k. at F 8,
but there is still a hint of softness towards the edges. At F 22 there is no diffraction. A very nice lens for a
botanist or a entomologist.
