Ask Bill & Dan

After a long absence, the boys are back with another two great photography questions.First up, Greg wants to do some street photography with this iPhone but feels limited by the focal length and wants to know the skinny on add-on lenses like Olloclip and Moment.Next up, friend of the show Kent is traveling a lot with big lithium-ion battery packs and wants to know what the rules are for bringing them on the airplane as well as best practices to keeping them in tip-top shape.OlloClipMoment LensesExoLensesOlloClip Active LensesExoLens ReviewFAA Battery FAQ - Straight from the sourceHow to Travel Smart with Battery-Powered StrobesFlying with Photography Gear