A few days ago I ordered a DFA 15-20 lens and it arrived today. I did
not have the chance to take it out and around much, but this link has
three photos taken this afternoon, two right after un boxing and one
from a brief drive I took looking for places to test it.
http://www.markcassino.com/b2evolution/index.php/dfa-15-30-f2-8?blog=9
Impressions:
- Its big and heavy. Make that very big and very heavy.
- Devilishly sharp. Virtually no softening at the corners or far edges
even at wide angles.
- The wide aperture and close focusing ability is remarkable. Both shots
wit the cats were at f4.5 and the dof is very narrow, but then the lens
was very close to the subjects.
- In the few outdoor shots I tried, it was difficult to get a good
exposure. At 15mm it was picking up the sky and the ground at my feet,
exceeding the dynamic range of the K1 (which is a pretty wide dynamic
range.) Granted, this was in full brilliant mid afternoon June sunshine.
But even then I was exposing -2 or -3 stops from the meter reading in
order to get decent highlights and then bring up the shadows in post.
The third shot - the lake - give me hope since it was into the sun,
though the sun was just out of the frame and lightly obscured but the
cloud in the upper left. But I did do about 10 minutes of post
processing to competss the tonal range and make a few other adjustments.
This is definitely a lens that will take a little time to understand and
master, especially at the 15mm end. I plan to take it out tomorrow for a
more extensive test drive.
Mark
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