[Bullfrog (Jeremy)]

I've recently acquired an old Skywatcher 120/600 refractor. I have not had any experience with refractors and would like some advice.

I have a little 114mm refractor and have been lucky enough to be the custodian of a Meade LX90 8in SCT for the past 12 months. I have used both of these scopes a lot for both visual and astrophotography. I have produced some reasonable images from both. Obviously the LX90 has produced the better shots.

I have noticed that many astrophotographers use refractors and would appreciate if someone could explain the pros and cons of refractors.

The scope is in reasonable condition. Its has a William Optics 10:1 focuser that works very smoothly. The objective lens has a few spots on it. What would be the best way to clean it?

Any advise is welcome.