November 6 2009 - Photo Jottings

November 6 2009


Sony DT 30mm F/2.8 macro first thoughts:  This lens has generated a lot of interest, especially concerning the working distance since the focal length is so short.  I had a chance to check out the new little macro I bought from Sony, and here are my thoughts so far.

Build quality; very cheap plastic feeling, probably because it’s super light weight.  It almost sounds hollow when you tap it.  It’s also nearly identical in size to the Sony DT 50mm F/1.8 lens, just lighter.  It also sounds scratchy when turning the focus ring manually.  I have a $20 Vivitar
28mm F/2.8 lens that’s built far better than this one.
Focusing; typical annoying SAM focusing, though this lens seems super loud, especially when running through the range at close focus.  Sony should try a new high tech quieter focusing system, such as a slot and screw design (!)  The lens extends out 3/4″ or 19mm when focusing close.  This lens has a stationary element(s) in the rear, unlike the other Sony macro lenses.
Working range; super short at about 3/4″ or 19mm from the end of the lens barrel to the subject.  This will cause problems in the field as the lens is so close to the subject, it blocks out light.  Sony offers a ring light and adapter for this model.
Macro performance; very sharp, and slightly sharper than the Sony 50mm F/2.8.  I see the 30mm has a very small amount of blue CA, and the 50mm has magenta CA, and a little more overall.
I hope to have this review ready next week some time, so check back soon.
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