Conversion circuitry in the housing allows all Ikelite DS model digital SubStrobes to provide real iTTL flash control as dictated by the Nikon D-70 camera, providing standard iTTL for matrix, center-weighted and spot metering, and also allows rear curtain sync. All of these work well. The circuitry is powered by the SubStrobe which MUST be attached with a single #4103.51 or #4103.52 dual sync cord, which can be identified by their blue band.

The circuitry powers up automatically when the strobe is turned on, lighting the yellow LED beside "TTL" on the label indicating the system is ready to use.

The arrow buttons beside "Mode" on the label provide four 1/3 f/stop increments of over or under flash compensation. This compensation is added to or subtracted from any compensation entered into the camera. Plus 1/3 f/stop is shown in this photograph.

Push both buttons simultaneously for one second to change from iTTL to Manual strobe control. The yellow LED beside "M" on the label illuminates, and the red LED shows "F" indicating full power. The arrow buttons access the eight manual power settings in half/stop increments.

Photograph shows sync cord attached to the new right-angle bulkhead on these housings.

DS-50 and DS-125 SubStrobes produced before September, 2004 communicate with the camera as per old Nikonos protocol. These audible ready and confidence signals interfere with required communication for new eTTL and iTTL digital cameras. The newest cameras also require the latest IGBT strobe circuits to perform the required rapid turning on and off.

* Updated strobes still operate fine with all installations including Nikonos.

DS-50 SubStrobes can NOT be converted to DS-51 spedifications.

DS-50 SubStrobes below 63,850 can NOT be updated to operate correctly with the latest eTTL conversion circuitry.
DS-50 SubStrobes between 63,850 and 69,999 require upgrade of electronics to operate. Cost of update depends on strobe circuitry. Strobe must be returned to the factory for evaluation to provide an estimate of upgrade cost. *

DS-125 SubStrobes below 2,500 can not be updated to operate with the latest eTTL conversion circuitry.
DS-125 SubStrobes between 2,500 and 4.999 require upgrade of electronics to operate. Cost of update depends on strobe circuitry. Strobe must be returned to the factory for evaluation to provide an estimate of upgrade cost. *