nikonbug wrote:
Anything over 20 seconds and I get star trails. So, what kind of tracking device did you use to eliminate trails on a 9 minute shot? I normally use a 14mm lens, and stitch together 4 or 5 shots to get the full sky. Nice shot BTW.
This equatorial telescope mount is used to track the movement of the sky (compensate for the rotation of the earth). Instead of the telescope just the camera with lens was mounted.
There are less expensive option for cameras here are two that I am aware of. I have never used them and am not recommending them.
https://www.bhphotovideo.com/c/product/979344-REG/ioptron_3302b_skytracker_camera_mount_with.html