Can there be too much in the train...

[Earl]

Currently Im Scope > Focuser > Filter Wheel > Camera.

Im considering Scope > Focuser > Filter Wheel > Rotator > Camera

Im worried about overall weight hanging off the end of the Tak and it would be nice to combine a few of these into one do they exist?

[andrew s]

I think a lot will depend on the quality of the focuser and if it can take the weight. The other issue which will depend on the kit you have is flexure in and between the focuser, filter wheel, rotator and camera. I don't know of any unit which combines all the options you need.

Regards Andrew.

[pete_l]

The longer you make the imaging train, the greater the lever arm on the focuser. So it's not just a case of the weight, but the applied torque increases as well as the weight. A double whammy.

[astrofox]

You dont say what scope you have. A lot of refractors need tons of back focus so the whole focus tube is nearly fully extended angain putting strain on the focuser.

[Earl]

You dont say what scope you have. A lot of refractors need tons of back focus so the whole focus tube is nearly fully extended angain putting strain on the focuser.

This is on my FSQ85

[Martin-Devon]

Earl, what make/type of rotator had you in mind for placing immediately in front of the CCD?

[Earl]

Earl, what make/type of rotator had you in mind for placing immediately in front of the CCD?

I was looking at the brightstar one from Modern Astronomy, its m48 both sides.

[Earl]

This is the current set up, I have plenty of room for back focus on the scope too.