I thought the rule of thumb was the x-L teleconverter was recommended for any long lens that could fit the added depth.
I use the 1.4x-L. I have never used (and do not own) a x-s series teleconverter so I can't give you a first hand comparison. Jeff -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
