Olll or uhc filter?

[John]

I've recently got an Astronomik OIII, so far I've used it to look at the veil (which was amazing), enhance the ring nebula (the ring shape was more defined) and look at the owl (which I could hardly make out the eyes, it looked like a ball). So far I think it is great, however I find it hard to focus when I have the filter in, also the stars don't look as clean as without the filter (something that Astronomik advertised as one of the benefits that stars will look the same) but overall I think it's good.

I don't think I've ever used a UHC or an O-III filter where the stars are completely unaffected by filter. I'd say that the Astronomik and Lumicon filters affect them less than any other type I've used though.

[craigfoot]

I've recently got an Astronomik OIII, so far I've used it to look at the veil (which was amazing), enhance the ring nebula (the ring shape was more defined) and look at the owl (which I could hardly make out the eyes, it looked like a ball). So far I think it is great, however I find it hard to focus when I have the filter in, also the stars don't look as clean as without the filter (something that Astronomik advertised as one of the benefits that stars will look the same) but overall I think it's good.

I was recommended that make elsewhere too. . But seem a little expensive, I think I'm gonna go with the skywatcher one and see how I get on.

Sent from my D5803 using Tapatalk

[John]

If it's a cloudy night and you want some light reading on deep sky filter filters and their uses this web page contains lots of info and links to lots more:

http://freescruz.com/~4cygni/horsehead/NebulaFilters.htm#Intro

[craigfoot]

If it's a cloudy night and you want some light reading on deep sky filter filters and their uses this web page contains lots of info and links to lots more:

http://freescruz.com/~4cygni/horsehead/NebulaFilters.htm#Intro

Cheers. . Cloudy or not my scope isn't with me at the moment, I was away last week and had to leave the scope behind cause no room in the car!

My parents are bringing it back next week :-) so trying to learn as much as I can to try out when it's back.

The frustrating thing with this hobby is not having enough time to try out what you learn!

Sent from my D5803 using Tapatalk

[craigfoot]

http://freescruz.com/~4cygni/horsehead/NebulaFilters.htm#Intro

Wow! That's some "light" read!

Sent from my D5803 using Tapatalk

[Dave In Vermont]

Craig - to your question: Yes they are software-programs you can run on a PC.

And some more data from David Knisely writing through the Prairie Astronomy Club:

http://www.prairieastronomyclub.org/resources/by-dave-knisely/some-available-light-pollution-and-narrow-band-filters/

Enjoy,

Dave