Sony AF DT 30mm F2.8 Macro SAM A-mount lens review by Bob Maddison
|Bob Maddison#10805 date: Dec-28-2012|
flare control: 4
|ownership:||I own this lens|
|compared to:||100mm Vivitar Plastic Fantastic|
Minolta 50mm f1.7
Minolta 35-70mm f4 'Macro'
|price paid:||119 GBP|
|positive:||Fast positive AF|
|negative:||No AF with a tele converter|
30mm FL = Short working distance
|comment:||The price paid was after the £30 Sony Cashback.|
Excellent macro lens. The short FL gives good DoF compared with my 100mm macro. At 1:1 the subject is almost touching the lens but this is characteristic of the 30mm FL. With a 2x TC (8 contacts), there was constant hunting with AF; with a 1.4x TC with only 5 contacts, no AF. However, at macro distances, the MF had a short sweet travel making it easy to use.
The focus system seems to be a combination of Internal and External mechanisms. The lens extension is too short for true external focus. It would appear that the rearmost element remains fixed when focusing and this might explain it. This shorter extension does make it easier to frame a macro subject, which would be more difficult with true external focusing, and also makes the focus faster.
The 5/4 lens elements help to give excellent colour rendering with good contrast reminding me of those older Tessar lenses!