Hey guys a friend recently handed me down his Sunpak auto 433AF flash, however I have never used a flash before. As I understand I can set the shutter to 125 and set my flash on one of the 3 auto features giving me my aperture. In this case lets say its 16. So I set it to 16 and fire away correct? And I should have a good exposure? Can I use this same methodology and set it to higher shutter speeds? Lets say for example, an aperture of 16 and a shutter speed of 500. Would I still be getting a correct exposure?