01Focal Length & Angle of ViewExplain focal length, field of view, crop factors and choosing focal length by viewpoint and purpose.→02Prime vs Zoom LensesCompare optical, practical and workflow trade-offs without gear-marketing bias.→03Lens Optical BehaviorTeach distortion, vignetting, chromatic aberration, flare, ghosting, sharpness and focus breathing.→04Macro, Teleconverters & Specialty LensesExplain specialized optics and when their unique properties solve real photographic problems.→05Photography FiltersComplete treatment of protection filters, polarizers, ND, variable ND and graduated filters.→
Lenses, Filters & Optical Science
Teach the complete optical toolkit: focal length, perspective, depth-of-field behavior, lens defects, specialty optics and filters.