Daniel Isaza wrote:

> Is it necessary to move the main mirror of a SCT for collimation,
> or just moving the secondary will fulfill all the telescope's
> collimation requirements?

On mass market moving primary SCTs you cannot collimate the
primary. This is why for high power (planetary) work collimation
is a moving target. Literally. As soon as you move the OTA
you change the collimation sightly due to the movement of the
primary.

For low power (deep sky) work this isn't an issue as the
collimation has to be grossly off to be noticeable.

Gene Horr

View index by [date] [author] [subject]
Previous message: Re: [M]: Collimating tools suggestions wanted, Email address hidden
Next message: Re: [M]: Software Recommendation, please..., Gene Horr
Previous message in thread: [M]: RE: Collimation via an artifical star., Daniel Isaza