Hi all once again, Probably a simple answer, but it's a little technical for me I am looking for a teleconverter at the moment, I have looked around, but to no avail. I have a Canon Eos 4000d - EF-S. I am looking for a teleconverter to fit this camera and a Sigma 150-500mm f5-6.3 DG OS HSM. All the converters I have looked at are EF fitting only not EF-S. Does anybody know of a teleconverter that would fit. Auto focus only, I haven't got the grasp of manual get and its rather difficult shooting birds. Would like X2.0 or X1.6. Could you also tell me how much more distance it would give me. Thanks for your help Pete.