1161 Available flash modesThe TTL and M (manual) flash modes are available with the SU-800 andSB-R200. Use of TTL mode is recommended for normal flashphotography.• Be sure to read the instruction manual of the camera in use.TTL auto flash modeIn this mode, the flash illumination that is reflected back from the subject isdetected by the camera’s TTL auto flash sensor and the camera automaticallycontrols the flash output level to give the correct exposure.i-TTL mode is available with CLS-compatible cameras, D-TTL mode is available withdigital SLR cameras not compatible with CLS, and TTL mode is available with camerascompatible with TTL auto flash mode. The following flash operations are available.TTL-BL flash (Automatic Balanced Fill-Flash)Based on exposure measurements obtained by a Matrix metering system, theflash output level is automatically adjusted for a well-balanced exposure of themain subject and background.TTL flashThe main subject is correctly exposed regardless of background brightness.This is useful when you want to highlight the main subject or make exposurecompensation.About the flash shooting distance range in the TTL auto flash modeWhen the SB-R200 is used as a remote flash unit, the flash shooting distancerange is 0.6m to 28m (2 to 92 ft.) and varies depending on ISO sensitivity andlens aperture in use.Usable flash shooting distance range (m/ft.)ISOAperture 25 50 100 200 400 800 1600f/1.4 0.6-3.5/2.0-11.6 0.6-5.0/2.0-16 0.6-7.1/2.0-23 0.9-10.0/2.9-32.8 1.3-14.1/4.1-46.4 1.8-20/5.8-66 2.5-28/8.2-93f/2 0.6-2.5/2.0-8.2 0.6-3.5/2.0-11.6 0.6-5.0/2.0-16 0.6-7.1/2.0-23.2 0.9-10.0/2.9-32.8 1.3-14/4.1-46 1.8-20/5.8-66f/2.8 0.6-1.8/2.0-5.8 0.6-2.5/2.0-8.2 0.6-3.5/2.0-11.6 0.6-5.0/2.0-16.4 0.6-7.1/2.0-23.2 0.9-10.0/2.9-33 1.3-14/4.1-46f/4 0.6-1.3/2.0-4.1 0.6-1.8/2.0-5.8 0.6-2.5/2.0-8.2 0.6-3.5/2.0-11.6 0.6-5.0/2.0-16.4 0.6-7.1/2.0-23 0.9-10.0/2.9-33f/5.6 0.6-0.9/2.0-2.9 0.6-1.3/2.0-4.1 0.6-1.8/2.0-5.8 0.6-2.5/2.0-8.2 0.6-3.5/2.0-11.6 0.6-5.0/2.0-16 0.6-7.1/2.0-23f/8 — 0.6-0.9/2.0-2.9 0.6-1.3/2.0-4.1 0.6-1.8/2.0-5.8 0.6-2.5/2.0-8.2 0.6-3.5/2.0-11.6 0.6-5.0/2.0-16f/11 — — 0.6-0.9/2.0-2.9 0.6-1.3/2.0-4.1 0.6-1.8/2.0-5.8 0.6-2.5/2.0-8.2 0.6-3.5/2.0-11.6f/16 — — — 0.6-0.9/2.0-2.9 0.6-1.3/2.0-4.1 0.6-1.8/2.0-5.8 0.6-2.5/2.0-8.2f/22 — — — — 0.6-0.9/2.0-2.9 0.6-1.3/2.0-4.1 0.6-1.8/2.0-5.8f/32 — — — — — 0.6-0.9/2.0-2.9 0.6-1.3/2.0-4.1