How to assign a button A7R

Started Jun 13, 2014 | Discussions thread
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lembadion Junior Member • Posts: 38
How to assign a button A7R

Hi

I do a lot night macro with my A7R and the Sigma 105 mm in manual mode

I use a small flashlight to illuminate my target (bugs), but need do open the lens to his maximum aperture F2.8 to get most of the light to focus. Then I fire a flash to finish mi photo.

How can I assign a button to do this ??

I like to press a button and the lens open to his lower f number

Thanks

Sony Alpha 7R
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