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skyliner 200p


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Not often I guess...depends how you move or handle it. Skywatcher telescopes tend to hold collimation pretty well. I had the 200P - which is optically the same tube as the Skyliner 200 - and I collimated it once or twice in 8 months. Even when you collimate it's usually minor tweaks to get it spot on..nothing major really.

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it depends what you mean by collimate. in term of a full collimation, maybe never.

in terms of checking:

spider vanes - once only

focuser - once only

secondary / focuser alignment - once and then perhaps every few months

secondary tilt - once and then maybe every month or so

primary adjustment - every time you observe

in terms of adjustment:

spider vanes - possibly never

focuser - possibly never

secondary / focuser alignment - once and then possibly never

secondary tilt - once and then maybe every month or so

primary adjustment - possibly a minor tweak each time you observe

it's an easy process but you do need a collimation tool. a cheshire/sight tube combo does everything.

see http://stargazerslounge.com/topic/197640-collimation-and-star-hopping/

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If you move the scope around a lot then a star test every session will be ok. I wouldn't expect the scope to go far out once it's been collimated fully - the odd tweak is probably all you'll need.

Welcome to SGL :)

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