from camera stores. Wide angle lenses will focus at 12" and do not require the addition of any close-up lens when used in a dome port. Other ports available #5503.... Lens length less than 3" (7.6cm) 5503.50 Lens length less than 4" (10.1cm) #5503.55 Lens length less than 4.5" (11.4cm) #5503.80 Lens length less than 5" (12.7cm) #5503.85 Lens length less than 6" (15.2cm) SUPER-WIDE DOME PORT For lenses with a 110 to 170 degrees angle of coverage. This port does not allow use of a port shade, and may not be fully functional with some lenses in the MD-size housing. #5503.15 Lens length less than 2.5" (6.3cm FLAT PORTS For standard, macro and telephoto lenses. #5501..... Lens length less than 2.5" (6.3cm) #5502.......  (less)

a flat front for macro and longer focal lengths. The seal of the interchangeable port system is the only design that allows you to see if it is correct. You can look through the clear plastic and see the "O" ring seal. If it looks sealed it will be sealed. Every other SLR housing relies on theory and hope. There is no way to see if the port is sealed properly on an aluminum housing. FLAT PORTS are for standard, macro and telephoto lenses. The 5505.46 works Auto focus only. Flat port recommended for macro lense  (less)

from camera stores. Wide angle lenses will focus at 12" and do not require the addition of any close-up lens when used in a dome port. Other ports available #5503.... Lens length less than 3" (7.6cm) 5503.50 Lens length less than 4" (10.1cm) #5503.55 Lens length less than 4.5" (11.4cm) #5503.80 Lens length less than 5" (12.7cm) #5503.85 Lens length less than 6" (15.2cm) SUPER-WIDE DOME PORT For lenses with a 110 to 170 degrees angle of coverage. This port does not allow use of a port shade, and may not be fully functional with some lenses in the MD-size housing. #5503.15 Lens length less than 2.5" (6.3cm FLAT PORTS For standard, macro and telephoto lenses. #5501..... Lens length less than 2.5" (6.3cm) #5502.......  (less)

from camera stores. Wide angle lenses will focus at 12" and do not require the addition of any close-up lens when used in a dome port. Other ports available #5503.... Lens length less than 3" (7.6cm) 5503.50 Lens length less than 4" (10.1cm) #5503.55 Lens length less than 4.5" (11.4cm) #5503.80 Lens length less than 5" (12.7cm) #5503.85 Lens length less than 6" (15.2cm) SUPER-WIDE DOME PORT For lenses with a 110 to 170 degrees angle of coverage. This port does not allow use of a port shade, and may not be fully functional with some lenses in the MD-size housing. #5503.15 Lens length less than 2.5" (6.3cm FLAT PORTS For standard, macro and telephoto lenses. #5501..... Lens length less than 2.5" (6.3cm) #5502.......  (less)

from camera stores. Wide angle lenses will focus at 12" and do not require the addition of any close-up lens when used in a dome port. Other ports available #5503.... Lens length less than 3" (7.6cm) 5503.50 Lens length less than 4" (10.1cm) #5503.55 Lens length less than 4.5" (11.4cm) #5503.80 Lens length less than 5" (12.7cm) #5503.85 Lens length less than 6" (15.2cm) SUPER-WIDE DOME PORT For lenses with a 110 to 170 degrees angle of coverage. This port does not allow use of a port shade, and may not be fully functional with some lenses in the MD-size housing. #5503.15 Lens length less than 2.5" (6.3cm FLAT PORTS For standard, macro and telephoto lenses. #5501..... Lens length less than 2.5" (6.3cm) #5502.......  (less)

from camera stores. Wide angle lenses will focus at 12" and do not require the addition of any close-up lens when used in a dome port. Other ports available #5503.... Lens length less than 3" (7.6cm) 5503.50 Lens length less than 4" (10.1cm) #5503.55 Lens length less than 4.5" (11.4cm) #5503.80 Lens length less than 5" (12.7cm) #5503.85 Lens length less than 6" (15.2cm) SUPER-WIDE DOME PORT For lenses with a 110 to 170 degrees angle of coverage. This port does not allow use of a port shade, and may not be fully functional with some lenses in the MD-size housing. #5503.15 Lens length less than 2.5" (6.3cm FLAT PORTS For standard, macro and telephoto lenses. #5501..... Lens length less than 2.5" (6.3cm) #5502.......  (less)

it to reshape itself uniformly. It will not safeguard against flooding.Every time you open the camera to change film, examine the O-ring and service if necessary.Always clean and lubricate after every diving day.When in doubt about the sealing capability of an O-ring, always discard and replace.Never use a sharp or pointed object to remove an O-ring! Use the O-ring remover tool.Don't overgrease! Too much grease attracts debris that will disrupt the seal and cause flooding. Silicone grease is not a sealant; it only protects the O-ring from abrasion. A perfectly greased O-ring looks moist and shiny  (less)

be too much friction to allow it to reshape itself uniformly. It will not safeguard against flooding.Every time you open the camera to change film, examine the O-ring and service if necessary.Always clean and lubricate after every diving day.When in doubt about the sealing capability of an O-ring, always discard and replace.Never use a sharp or pointed object to remove an O-ring! Use the O-ring remover tool.Don't overgrease! Too much grease attracts debris that will disrupt the seal and cause flooding. Silicone grease is not a sealant; it only protects the O-ring from abrasion. A perfectly greased O-ring looks moist and shiny.  (less)