RocketScientist wrote:
Be sure you get the adapter if you don't have it yet. Probably T-Mount to EOS - they also make T-Mount to Nikon. About $5 on eBay, Some even have the "AF Confirm" chip. Without the chip your dial should be on M. Even though the chip allows Av or Tv, I find I'm better off at full manual. I use an Opteka 650-1300 and a Lentar 500 F8 like that with my Canons.
A tripod will be very handy with this.
There will be a bit of experimenting with exposure time. With a little work and playing around, you'll get some decent shots.
Be sure you get the adapter if you don't have it y... (
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I'm fairly sure the Sigma 600 didn't come in a T mount, only camera specific fittings. I suspect your thinking of the cheap "branded" makers mirror lens which were usually a T mount.