As my people say, go raibh maith agat gents. I'm actually thinking of selling the Tamron and trying to land a 400/3.5 Nikkor but there's also the 600/4 AI Nikkor that can be had for a reasonable price and a TC300. Will let you all know if I go this route.
I got these two moon photos Saturday night, but the planets not so much. I have a Tamron 400/4 with the 1.4x and 2x Adaptall converters and a Nikkor 300/2.8 AFS with the Nikon 1.4x TC. The third photo is a composite of Jupiter and Saturn taken with the 400 with both TCs on it. It's heavily cropped, not terribly sharp, and has a ton of coma around Jupiter. I compare this with teh shot of Jupiter that Jim got with the P900 and I wonder what I'm doing wrong. I also tried shooting Mars Saturday night with multiple different lens / TC combinations, but all I got was either a bleached white ball with an orange fringe or an orange ball with a darker orange fringe. Am I expecting too much out of my equipment? The last photo (the little one) is a deep crop from a shot of one of the stars in Orion's belt and there seems to be some detail in it unless that's some kind of artifact.
What a pain in the @$$. This is part of the reason I hate FB - too many computer-geek demigods who spend all their time there and would literally burst into flames if they actually went outside on a sunny day I got flamed on one group for quoting an idea that some of the members thought was "too simplistic." There'd been enough BS on the group previously that I just dropped it.
This is all the more reason we need to make sure this forum stays up & healthy.