I have a used Nikon 1.7 Teleconverter for sale, used but in excellent condition. Both end caps are included. Retail is $400, $250 is my price. I tested this on my D500 with no problems. Paypal check, bitcoin (just kidding about BC) are all fine for payment. To see if your lens is compatible with a teleconverter look here. https://cdn-5.nikon-cdn.com/Assets/Common-Assets/Images/Teleconverter-Compatibility/en_US_Comp_chart.html Please check out my photos.