So much to experiment with, this is the 800 with TC and last nights moon. as a note for those that are curious there was vignetting at the corners. Also while I cant post the pic here I tried the Samyang 14mm 2.8 and it completely covered the sensor and was sharp to the edges. I wish I could find one of my ultra wide Nikkors that could do that. I do have several 20-24mm's to try.
First with TC and Cropped, second is without TC and shows you the whole image so you can see the vignetting at the corners.