Radar
February 1st, 2007, 07:42 PM
I'm always looking for feedback on what filters people have and their thoughts on their practicality. There are so many on the market that it can be hard to choose which one without sites like this.
I currently have a Baader Oxygen Three filter. It gives me good views of objects like the Helix.
I have an Orion Sky glow which is for light pollution, which works well.
An IDAS light pollution filter which also works well for Astrophotography.
Any others filters out there that you guys can recommend or tell me about would be welcome info.
Thanks
Ray
phoenix
February 18th, 2007, 10:48 AM
[QUOTE=Radar;1298]I'm always looking for feedback on what filters people have and their thoughts on their practicality. There are so many on the market that it can be hard to choose which one without sites like this.
Yes it would be be good to know about all different types of filters.
For those who are considering buying them.
Cheers Jason :pipethinker:
AstroTasmania
February 18th, 2007, 03:46 PM
Hi Radar,
That's a big ask, but I know what you mean. At anything from $100 upwards, they are not cheap things to buy. As well the various types, they come in 1.25" & 2" sizes. I have quite a range in both sizes, collected over many years. One unit I find very handy in my Sirius Optics Vari-filter unit, which consists of two rotating filter discs, which at set positions produces various results on the planets, Moon, nebulae.
Basically, I break them down to visual & photographic, depending on what you do. Image work, UV/IR blocking is pretty standard, H-alpha transmission narrow band, tri-colour set, IR blocking, IR transmission, Solar Continuum, Neutral density for solar work, as well as H-alpha filter systems for solar disc & prominence work.
Visual, they can be just various plain colour contrast filters such as red, yellow, green, blue and so on to bring out planetary details, Violet Fringe Reducers, (this one goes under various names but all do the same job) Contrast Enhancer, etc.
Polarising filter to reduce light intensity when observing the moon, Oxygen III for observing nebulae, the list is endless.
Log on to the Baader Planetarium website and have a look at what they have and a description of what each filter does.
Others will obviously chip in with some comments,
Clear skies...