Fujinon-C 450mm f12.5 corrective and Nikon's Nano-coated glass does

and Nikon's Nano-coated glass does

good light seals

Unsure what makes this "Tri": There's a top compartment (measuring approximately 14x14x24cm) and a bottom compartment (about 15x22x26cm) but I'd assume a third compartment to complete the count

and our warranty does not cover water damage: consider this a rugged

Fujinon-C 450mm f12.5 corrective and Nikon's Nano-coated glass doesThe extremely compact Fujinon C 450mm f12. 5 covers up to 8x10, which is impressive for its size. Not the fastest lens in the world, but it's sharp, and it weighs less than 300g. Supplied in an accurate Copal 1 shutter with retaining ring; original box is included, too.