I'm not sure which forum to slip this one in: this one or the 'Eyepiece' forum?!
I've got a GSO laser collimator, so dose a mate of mine. Both of us have the same problem- the collimator has a sloppy fit in the 1.25" focuser, with both types of fixing styles, screw or compression ring. Therefore I have no confidence in the quality of the resulting collimation effort, as the collimator is not held securely in the focuser- there is a wobble when the holding screw is tightened. Shows up in the image quality as the stars are still not pin-point (secondary alignment is good).
So, my question is who has a brand of laser collimator they are willing to recommend? This problem undoes the work that's gone into rebuilding my 17.5" dobbie,
. My focuser is a 2" type with a 1.25" adaptor. Is there an addvantage of using a 2" collimator over a 1.25"? The newtonians I have all have 2" focusers.
Mental.