Questions? Go here: www.youtube.com Tutorial on how to take nighttime photographs. FAQ Question: Why can’t you use higher ISO sensitivities instead of ISO 100 or 200? Answer: Two reasons; 1) shutter speeds slower than 15s aren’t always possible at higher sensitivities and 2) you’ll get cleaner results at low sensitivities. Question: What about Self Timer? Answer: Self Timer will still cause camera shake unless you add a sandbag on top of your camera on the same axis with the tripod head. The sandbag will absorb the vibration, minimizing the chances of camera shake. Question: Why aren’t ƒ/1.4 lenses recommended? Answer: ƒ/1.4 lenses are designed for using at large apertures no smaller than F/4. Exceeding F/4 will result in lens diffraction, which decreases the image quality. A lens that is capable of delivering clean results at low apertures is recommended in order to accomplish slow shutter speeds slower than 15s.