Certainly the HVL-F20S is not like necessarily the full system flash an SLR, who needs something, must halt so buy a flash through the respective adapter, which after all is possible - even though I agesichts the market segment of the NEX-3 (Second-pocket camera for APS-C-trailers) consider something unpasend. Also looks totally stupid when the flash is twice the size of the camera. back to the product. The supplied flash for NEX-3 as well as the built-in flashes of successor models are more expedients as in all pocket camera and so they should also be considered. The HVL-F20S is an effective add-on option, which has managed the balancing act in my opinion, on the one hand for higher claims to offer more flash power and secondly to introduce the term "compact camera" nich absurdity. Sure, the housing is made of high quality plastic less not just triggers enthusiasm, but here you have to look at the competitive price. What really interested in is an improvement in luminous efficiency compared with the supplied mini flash and that is definitely noticeable. For me personally superfluous options such as switchable light scattering and flashes on the ceiling, the device offers. In darker rooms and backlight or other fill-flash situations the flash does its job perfectly and gets me so full marks. Too bad that it is not possible to install it in the follow models of NEX-3. But if customers want a built-in flash (which is also practical indeed), past stop off no hot shoe.