Tip:
Highlight text to annotate it
X
Very stiff focus ring
Aperture ring is smoother than the focus ring. Aperture steps are not linear.
The aperture has 15 blades
M39 adapter is very thin (depends on the mount) and it is easy to buy it on eBay for approx. $20
Kiwi adapter is not very precise. M39 lens are not capable to focus to more than approx. 30 meters
Bokeh is quite nervous on F2.0. Smaller apertures increase the depth of field and make the bokeh smoother.
Smooth aperture ring is fine for video. You can adjust the depth of field without "clicks" of the aperture ring.
Light sources are problem. Lens has big problem with lens flare and ghosting (small contrast).
1/400 s, F2, ISO 100, 85mm (130mm EQ)
1/500 s, F4, ISO100, 85mm (130mm EQ)
1/160 s, F8, ISO 100, 85mm (130mm EQ)
1/1000 s, F2.8, ISO 100, 85mm (130mm EQ)
1/350 s, cca F2.4, ISO 100, 85mm (130mm EQ)