Many thanks to both of you for your reply. I want to use it in the field for photographing flowers and insects. I have previously used the on camera flash but find this isn't adequate and I have now purchased an extension tube to use with my 105mm macro and also my 17-85mm lens. I wanted something that would take the flash to near the end of the lens as I have seen with many of the macro set ups. I have attached the sort of image that I take. I would really like both hands free and I won't necessarily be using a tripod.
KerryN
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