INON D-180 ManualVersion 1. October 4, 2003Copyright 2002, 2003 by INON America, Inc. All rights reserved.36There is a 6mm threaded socket in the base of the strobe. Whichever attachment system you usealways be sure the bolt length is not too long. If the bolt is too long and is screwed down so thatit contacts the housing body, the strobe may be damaged. When screwing in, always make surethere is a gap between the end of the bolt and the strobe body.Chapter 3 How to use the D-180 StrobeMain Mode Switch Setting MethodMain Mode Switch setting positions:OFFTurns D-180 power off.AUTOSet to AUTO when using “External Auto Flash Exposure Adjustment”. To actually enable“External Auto” it is necessary to set the Aperture Value Set Switch to a value closely matchingthat of the camera system.FULL, M-2, M-3, M-4For manual exposure, set the dial to one of the four positions.The light output level for each position is as follows:Switch Position Output Level (**) Guide Number (*), (**)FULL 1 18M-2 1/4 9M-3 1/8 6.3M-4 1/16 4.5(*) Guide Number (Air / ISO 100 x m)(**) The Red Strobe Ready Lamp will activate when the strobe re-charge is 80% complete. Forsituations where more precise output is necessary, such as manual flash, or for TTL when thesubject is distant and at the far end of the TTL effective range, necessitating a full strobe discharge,we recommend you wait an additional one second after the Strobe Ready Lamp comes on.Also, when the batteries are near exhaustion the voltage level tends decreases, and the actual strobeoutput may be slightly less than indicated. Alkaline batteries especially have this tendency forvoltage to decrease, so also consider this factor when precise and/or full strobe output is necessary.