Wireless flash trigger, sony alpha Y20B-S1 ON A HVL-f42am

Wireless flash trigger, sony alpha Y20B-S1 ON A HVL-f42am Tube. Duration : 3.65 Mins.

This is a review on a wireless flash trigger for my sony alpha. The model is y20b-s1 and works on my hvl-f42am. Recorded on my iphone 4

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