Top positive review
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NEX AF Speed... Transformed
on January 24, 2013
I had been using Sony LA-EA1 adapter to use my A-mount lenses on NEX. It worked well especially since I prefer to use manual focus. However, a couple of my A-mount lenses that could be used on NEX weren’t very friendly due to their tight focus gearing (“High Speed AF”). So I ventured into LA-EA2 territory.
The adapter itself is built well, like the LA-EA1. It is bulkier, and slightly heavier. And of course, it uses SLT, so addition-caution is necessary. I like that the tripod mount is integrated into the adapter as opposed to a screw-on type on LA-EA1. The extra bulk at the bottom can come in handy to some (as it does to me), to support longer/heavier lenses.
Since one of the features LA-EA2 comes with is “AF Micro Adjust”, it got used right away. Next was to see if the LA-EA2 lives up to its price and claims. In short, it did. Key findings are as follows:
1-LA-EA2 transforms NEX into SLTs. Consequently, the AF speed is excellent. The 15-point (3-cross type) PDAF system, similar to the set up in my SLT-A55, takes over.
2-If the lens optically stabilized (as is the case with my A-mount travel zoom, Sigma 18-250 HSM OS), the NEX benefits from the OS. So, Sigma, if you’re reading this, keep the OS going for A-mount lenses and you may expand your customer base.
3-LA-EA2 supports AF for Screw-drive lenses.
4-Focus Peaking works, in manual focus mode.
5-If DMF mode is set, focus peaking still shows up when auto focusing (AF-S). A key advantage to this is that while PDAF AF points will be used to focus, the focus peaking feature also highlights areas that are in focus.
6-In AF-C mode, focus peak “assist” is unavailable.
Overall focusing speed is as fast as one can expect. I tested the adapter with Minolta 200/2.8 G APO HS on my NEX-3, and my blazingly fast dog on her maiden visit to a dog park. The only limitations were with shutter lag on NEX-3, and the dog being too fast for the shallow DOF from that beautiful lens.