I've been eyeballing a 400 f/5.6 for awhile now. Aside from daylight photography, I was interested in using the lens for photos of the moon. However, that would require the usage of teleconverters. I have (2) Kenko 1.4x DG TC's.
Has anybody used a 400 f/5.6 with 2 Kenko TC's for moon photography? For around the same price, I could pick up a Sigma 150-500 but I prefer a prime. I'm trying to keep the budget to around $1000.
I'm using a 5D.