how many filters at one time?

[dale blue]

Hi everybody,as i'm fairly new with astronomy(had a mak 127 for 2 weeks)how many filters can you use at one time.

ie-moon filter with light pollution filter etc and were do you place them?

cheers Dave.

[dale blue]

Sorry,i forgot to mention i've a 90 degree viewer also.

[John]

The filters screw either into the bottom end of an eyepiece or (more convenient) into the end of the 90 degree diagonal.

You can "stack" a number of filters but each piece of glass in the optical path does lessen image quality a bit.

[Ad Astra]

No real advantage to combining filters. Each one is designed for a rather specific task - for instance, if you are looking at the moon, a little light pollution won't bother you at all - so there would be no reason to stack a Moon filter with a LP filter. Vice versa is also true, if looking in deep space for a nebula - you wouldn't want a dark moon filter, it would make the nebula invisible.

All that said, you can't hurt anything by trying it out. If you find a new amazing combo of filters for something - post it and let others try your "recipie"

Dan

[great_bear]

Other than using the two polarising filters that are combined to make a variable moon filter, I'm struggling to think of any time - real or imagined - when I would use more than one filter at once.

As the Prof. says, they're pretty specific things really.

[dale blue]

thanks chaps for all your feedback,this has helped me somewhat for the future.

cheers Dave.