Choosing filter/ which are best for each neb

[Eren]

Found a useful page, not sure if it's been posted before. It could help with choosing a filter for nebulae as it compares each (UHC, OIII, DEEP SKY, H-BETA) and also has detailed notes on performance of each on lots of nebulae and which is best for each, hope it could come in handy

[Galen Gilmore]

This is the wrong area to be posting this, the imaging challenges are meant to upload your pictures that are directly related to the theme. Lets move it to an area where more people will see it .

[Dave In Vermont]

No worries, Eren - the mods (who I'll notify) can move this to the Discussion - Eyepieces forum.

In the meanwhile, I'll bet the below is the listing you found? By David Knisely of the Prairie Astronomy Club. I turned it into a Pdf. so people can handle it more easily:

Filter Performance Comparisons For Some Common Nebulae - by Dave Knisely.pdf

If this isn't - do check it out. It's excellent!

Enjoy!

Dave

[Mark at Beaufort]

Moved

[Eren]

My bad, not sure how I managed that! Yep that's the one Dave

[LukeSkywatcher]

For nebulae.......you want either or both a UHC and Oiii. UHC will enhance the visible (M42 etc). OIII will show the invisible (the rosette,veil etc).

Im a nebulae kind of guy. I have both filters. 

[ronin]

Does anyone know if there is a reason Dave Knisley didn't include Ha filters in his comparison of performance?

[Mr Spock]

10 minutes ago, ronin said:

Does anyone know if there is a reason Dave Knisley didn't include Ha filters in his comparison of performance?

Ha is a photographic narrowband filter - quite unusable for visual

[Ricochet]

59 minutes ago, ronin said:

Does anyone know if there is a reason Dave Knisley didn't include Ha filters in his comparison of performance?

Because you can't see it.  With a wavelength of 656nm it is outside the range of scotopic (night/rod cell) vision. 

Edit: I made a graph to demonstrate.

[John]

Interesting that the H-Beta line response is around 15% lower than the O-III lines. With the 3-4% loss using a n H-Beta filter to add to that perhaps it's no wonder that the Horsehead Nebula is hard to observe ?

[Merlin66]

In a "dust free" environment the Hb emission would be 50% of the Ha.

[25585]

I have 3 filters all made by Lumicon. The OIII is the one I use most, as it's for Orion. 

My other 2 are an Ultra High Contrast & a Deep Sky. The former is an OIII lite, allowing more bandwidth but has more general use. OIII is the best for Orion without doubt.