ThomasLondon

It is a fairly big blob close to the North horizon, and the only one with a tail. Last night even my kids found it with naked eye, even in the outskirts of London (well, they saw where the telescope was pointing).

Take SkySafari, check the position of the comet relative to Ursa Major and the pole star, at about 11PM find a spot with reasonably free view to the North horizon, and if you even find some small binoculars it's actually hard to miss.

I recently used a swab for cleaning a dslr sensor and the respective fluid, worked great without removing the mirror.

Best 

Tom

Hi,

I would like a bit of TLC for my Celestron Nexstar 9.25 Evolution - cleaning it properly, some dust on the corrector, ensuring it's collimated correctly, and I am also not quite sure whether the Vixen bar at the side might be lose - it seems to move a bit when adjusting the scope. Does anybody know who can do this - preferably in the London area, given it's not a device you just put into a little box and post it somewhere - and what it is likely to cost? Any advice?

All the Best

Tom

On 02/05/2019 at 16:57, BinocularSky said:

How do you adjust it [the solar finder] so that it's parallel to the OTA optical axis?

You do not adjust non-adjustable solar finders. You point the telescope to the sun, then you mark the position of the sun on the screen with a sharpie (plastic finder) or a pencil (SolFinder). 

The only adjustable ones I know are Televue SolSearchers.

Pragmatically: Wait for some time for a 2nd hand one to come up here or on Astrobuysell - they are 50 - 75 pounds. Looks unlikely that the parts and work are cheaper.