Today I have tried this application with my Nikon and a USB OTG and I have to say that is quite interesting specially if you don't have a wireless/IR remote control for your reflex.
I have done few shots on auto and works perfectly. Obv also in manual works.
The apps is free and there are a lot of similar, anyway is available here:
ClickFew screenshot:
How it works:
Edited by LucaRocchi on 2014/2/10 23:55:48