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-   -   New Sony A-mount 18-135mm (https://www.dvinfo.net/forum/sony-nxcam-nex-fs700-cinealta/509122-new-sony-mount-18-135mm.html)

Peter Corbett July 8th, 2012 06:24 PM

New Sony A-mount 18-135mm
 
Just wondering if the new Alpha 18-135mm lens will be a good alternative to the kit lens for those with the A-mount adaptor? It's got a new "SAM" auto-focus mechanism which may be more suited to AF use with the FS700 than the E-mount kit lens. It's not the fastest or biggest range lens but is has some potential as corporate-video style lens.

Link to Sony site.
18-135mm f/3.5-5.6 Zoom Lens| A-Mount Zoom Lens | SAL18135 | Sony USA

Olof Ekbergh July 9th, 2012 07:28 AM

Re: New Sony A-mount 18-135mm
 
I may be wrong but the AF system will not work on slower than f3.5 lenses.

If I understand Sonys note correctly.

"Aperture setting for video capture is fixed at the maximum aperture of the lens or f/3.5, whichever is lower (AF-C)."

This means only wide setting on this lens would auto focus. Also lens would always have to be wide open.

Am I wrong about this, has anyone tried slower lenses with the LA-EA2 adapter?


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