SB-28
The SB-28 is
designed for film cameras and offers full 3D-TTL with Group 1
type cameras ( specified on p. 3 of the SB-28 manual - including F-5, F-100, F-90x series,
F-90, F-80, F-70).
The SB-28 can
be used on the D-1 pro digital camera except in TTL mode (Note the D-1 camera shutter will
not release if the SB-28 is set to TTL mode)
SB-28DX
SB-28DX offers
full D-TTL operation with
the D-1 digital camera and can be used as
normal on Group 1 type
cameras.
Essentially, the
flash performance and operation of the SB-28 and SB-28DX are similar but SB-28DX offers
compatibility with the D-1.
Operational Notes
The
<D-1/SB-28DX> and <film camera/SB-28> combinations use different methods to
obtain the same result. Under normal conditions flash results should be the same, but
because different systems are employed to gain the correct flash output some differences
may be experienced.
3D-TTL is available on
the SB-28. It automatically controls flash output to keep both subject and background
correctly exposed. The SB-28 fires a series of near-invisible preflashes called
"Monitor preflash". These preflashes are detected by the TTL multi-sensor in the
camera and the data is then combined with the distance information from D-type Nikkor
lenses and other exposure data to determine the optimal flash shooting distance range and
flash output level for balanced fill-flash exposure. During main flash, the camera flash
sensor continues metering the reflected light from the film surface and stops the flash
output at the correct time.
TTL is available
when the SB-28DX is used with the D-1. The flash works the in same way as above but there
is no control over flash output during main flash as the CCD .The flash power is
calculated by Monitor preflash reflections from the light-grey shutter curtain.
During actual exposure, the CCD does not reflect enough light to provide accurate
flash sensing.
The SB-28
(3D-TTL) does not use Monitor preflash if the head is set for bounce photography (if the
head is moved away from the standard position): it uses off-the-film metering during the
main flash to detect when the correct exposure has been reached and flash output can be
stopped.
The SB-28DX
(D-TTL) uses Monitor preflash regardless of the head position, as there is no possibility
of detecting flash power from the CCD surface (as explained above). As, in this respect
there are two different methods employed for flash control when the head is tilted or
swivelled, there may be subtle differences in the flash exposure results for the SB-28 and
SB-28DX.
No. The
SB-28 automatically detects that it is mounted on a D-1 and switches to Digital TTL mode.
