Nikon 25446B D90 User's Manual - Page 260

• Nikon filters can be divided into three types: screw-in, slip-in, and rearinterchange. Use Nikon filters; filters manufactured by other makers may interfere with autofocus or electronic range finding. • The D90 can not be used with linear polarizing filters. Use the C-PL circular polarizing filter instead. Filters • The NC and L37C filters are recommended for protecting the lens. • To prevent moiré, use of a filter is not recommended when the subject is framed against a bright light, or when a bright light source is in the frame. • Center-weighted metering is recommended with filters with exposure factors (filter factors) over 1 × (Y44, Y48, Y52, O56, R60, X0, X1, C-PL, ND2S, ND4, ND4S, ND8, ND8S, ND400, A2, A12, B2, B8, B12). Optional • Nikon Speedlights SB-900, SB-800, SB-600, and SB-400 flash units • Nikon Wireless Remote Speedlight SB-R200 (pg. 233) • Wireless Speedlight Commander SU-800 • Capture NX 2: A complete photo editing package. • Camera Control Pro 2: Control the camera remotely from a computer and save Software photographs directly to the computer hard disk. Body cap Note: Use the latest versions of Nikon software. Most Nikon software offers an auto update feature when the computer is connected to the Internet. Body Cap: The body cap keeps the mirror, viewfinder screen, and low-pass filter free of dust when a lens is not in place. n 240