I've been working in the EFP/ENG world exclusively so I need to plead ignorance when it comes to shooting with 35mm still and cinema lenses. I'm accustomed to working with either 2/3" HD zoom lenses or the fixed lens on my HVX200.
I specialize mainly in wildlife behavior, so the 40x HD zoom lenses are currently the best tool for the job. Using the Birger mount that I've learned about on these forums, could I get comparable results with the Canon EF telephoto 100-400 telephoto lens (with the 2x extender). Obviously, the price difference between this set-up and the Canon 40x HD lens is drastic, so I assume it wouldn't come close, but I'm not sure about the specifics:
- How would the Canon EF 100-400 plus 2x extender compare to the 40x magnification?
- If I shoot with the EF lens in 4k, can I crop a sharp 2k image in post that's comparable to the 2K image I'm stuck with on the HD lens?
- Any guesses on the comparable sharpness at the end the the lens?
- Am I completely on the wrong track here? Is there a better long lens solution that I'm missing?
Sorry if my tech knowledge is lacking... I'm a producer/DP so I can't dedicate the time to these issues that I should.