Skywatcher ED 80 lens cleaning

[Miguel1983]

Hi,

i seem to have a dirty lens on the telescope side of the lens.

Anyone disasemble this before ?

I already checked the camera, filter, and focal reducer seperatly, the "staines" are from the telescope-side of the lens (already cleaned the outside of the lens to)

Flat frame

 

[Jkulin]

As long as you shoot flats those tiny marks will be removed, they are so tiny as to have been of no consequence.

[Miguel1983]

11 minutes ago, Jkulin said:

As long as you shoot flats those tiny marks will be removed, they are so tiny as to have been of no consequence.

Hi,

there in my last picture, and i took 100 flats

 

[Jkulin]

You have gradients which a background extraction will fix, but I can't see any dust bunnies.

You only need about 30 flats at about 25k-30k ADU