190MN and eye piece back focus

[Gtech]

Having just got a 190MN, I added two Celestron X-Cel eye pieces (7 and 18mm) and a SW Panaview (32mm)... love the Panaview, totally immersive and seems well corrected. Only problem is all these EPs require the focuser to be racked way out, along with a ext tube and the EP at the limit of its travel. Is this normal as It seems quite unbalanced (axially). While putting a camera on the SW focuser puts things at the other extreme (close).

[Pig]

I have never even thought of this concept, I just focus in and that is it. Does it have a detrimental effect ?

[Gtech]

Does it have a detrimental effect ?

Only in terms of sag, seems to put quite a bit strain on the stock focuser

[Pig]

Ok something for future reference

[alan potts]

Gtech,

Yes it is normal and somewhat annoying too. The sliding tube reminds me of playing a trombone, I have just learned to put up with it now.

Alan

[Gtech]

Thanks Alan, glad its normal. I guess its good that the assembly is retracted when mounting a camera (weight-wise, vibration etc), but not so good when extended with a weighty 2" 32mm EP.

John

[alan potts]

I keep toying with the idea of changing the focuser to a Moonlite. I am sure I can do it but it seems like there are a good few problems to iron out on route. There is a very good report on site somewhere from a member who has done the lot. Open heart surgery, he makes it sound easy. In truth there is only the fact that to get the Moonlite I would have to get it from the UK that is stopping me, and thats not that difficult.

I have never tried a camera on it, yet.

Alan.