As no-one else has replied... I do not know how well or if they work with 1Ds, but I have a pair that work were well with a Hasselblad ELD.
Unfortunately it is unlikely that you could try them (or all the features) on a 1Ds without acquiring an adaptor. I am in SE Warwickshire. =============================================================== GO TO http://www.prodig.org for ~ GUIDELINES ~ un/SUBSCRIBING ~ ITEMS for SALE
