Lens filters.
Nikon, B+W, Hoya, Tiffen, etc, etc, etc. 800 brands. What's crap? What's "good, but you're paying for the name"? What's good w/decent price.
This link for the 16-35mm has two options. 1) Lens, USA-Warranty; and 2) Lens, USA-Warranty and 77mm UV filter. SAME PRICE. What's...