Ikelite Flat port 5.1 inch Length

Ikelite Flat port 5.1 inch LengthFlat ports are recommended for standard, macro and telephoto lenses. Due to refraction, flat ports reduce the angle of coverage of a lens and magnify the image. This makes the flat port ideal when using standard, macro or zoom lenses to shoot small subjects.Note that if a port is long enough to accommodate the full length of a 1:1 macro lens, the lens may vignette when used at infinity. If access to the lens' full range is desired, then select a dome port instead.Accommodates lenses up to 5.1-inch (13.0 cm) long and 3.3-inch (8.4 cm) in diameter.