webcam in heritage 130p

[tms48]

Is there an easy way to achive focus usng a webcam in a f5 heritage 130p.

At present even with the focusser scewed fully in, unless I slide the truss legs slightly inwards it will not focus, I have checked it out and do not appear to have this problem with my f6 200p dob.

By using this method I am not using the stops on the truss legs so they are liable to slide in an a slightly unequal distance losing the original collimation to the telescope.

I dont really want have collimate independantly for imaging or normal viewing, any answers would be appreciated.

[Cornelius Varley]

The Heritage 130 as with al lot of small reflectors doesn't have sufficient inwards focuser travel to allow a DSLR or webcam to achieve focus. The solution is to use a barlow lens, this moves to point of focus outwards and allows a camera to reach focus. This Youtube video from The Astronomy and Nature Centre gives a good explaination

Peter

[tms48]

Thanks that seems to be an easy resolution to the problem.

[LukeSkywatcher]

Yep. I can get my 450d to focus in my heritage by using a 2x barlow.

[Mr TamiyaCowboy]

had same problem on my SW heritage 76 table dob.

i overcame problem without using a barlow. i removed the eyepiece holder screwed into the focuser tube. then slipped my webcam into focuser tube.

i am unable to move main mirror as it is glued into its holder. so i unscrew eyepiece holder and slip cam into focuser. couple hairbands will hold it inplace and you have a lot more inwards travel that you are lacking