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Nikon SB-28 with F4


jimi

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A copy of a post I made in a previous thread here about rear-sync flash:

 

The SB-24/25/26 series of Speedlights are said to be "rear-sync-smart". They have their own switch that you can slide to rear-sync mode. When mounted on a rear-sync-enabled Nikon camera, such as an F4, the camera would know that the flash trigger signal must be given at the end of exposure (rear-curtain). Although the F4 can do rear-sync, it requires a "smart" Speedlight to tell it when to fire on rear. Note: with the F4 in Aperture-Priority or Program modes, the rear-sync switch on the flash also activates slow-sync.

 

OTOH, the SB-28/80/DX/non-DX series are what you can call "rear-sync-dumb" units. They have no switch of their own, but given the signal from a "smart" camera like the F5, they can fire on rear-sync.

 

This means an F4 paired with an SB-28 cannot do rear-sync since both are "rear-sync-dumb". They both need to be told to fire on rear curtain but (big BUT) they have no such control to tell EACH OTHER. However, an F5 paired with an SB-24 can do rear-sync. Both have built-in controls but the SB-24's control takes precedence while the F5's rear-sync mode is ignored, i.e. you need to slide the SB-24 to rear-sync to make it work, while simply setting the F5 to rear does nothing. Some compatibility issues there, no doubt.

 

It was apparent with the advent of F90/N90 (the camera after the F4) that Nikon's trend was to move the rear-sync control from the flash to the camera. When the SB-25 and SB-26 came out, they still sported rear-sync slider switches, a fact that is testament to Nikon's support of backward compatibility. That's because at the time these two Speedlights came out, the F4 was still the flagship camera, and it made sense for Nikon to do this. However, the F5 replaced the F4 as the flagship and just like the F/N90, the F5 also had a built-in rear-sync control on its body. I believe at this point, Nikon felt no need to create the rear-sync control on new Speedlights that came out after the F5 (SB-28 and later).

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