I was using a Canon 600D 1/250th sec ISO 800.
Nexstar GT 1300 with t connector and a barlow connected to that..
I needed a lens in the barlow to enable me to focus.
The only processing was a little sharpening as the image was shot in RAW format.
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Hi All, I understand the process of attaching my DSLR to my Nexstar 130 using T-adapter however, What is my is my f stop ? . Now I have taken off my lens I have no control over my focal length . So, how do I find my f/ length ? It says on the data sheet that the reflector / mirror is 650mm and I hav...