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Go Back   IceInSpace > Equipment > Eyepieces, Barlows and Filters

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  #1  
Old 12-10-2018, 01:09 PM
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MattT (Matthew)
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O-III filters....which one for visual

Im after recommendations for a 2 O-III filter for visual, using my 6 f12 Refractor.
I have an Orion Ultrablock UHC that works quite well on some objects....the Dumbell neb is like a cotton ball with it, and barely there without it....so thumbs up from me. A google search reveals Baader seems to make filters for Celestron and Orion, so the Baader 10 nm 2 looks good, as does the Astronmik at quite a bit more cash outlay. Any others?
I have a filter drawer system on a 2 GSO dielectric diagonal so changing filters is a breeze.
Matt
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Old 12-10-2018, 03:34 PM
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Atmos (Colin)
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I used to have a 2” Baader one years ago that I believe was 12nm and that worked wonders in my Melbourne backyard.
I eventually downsized to a 4” for my primary visual scope and got the planetary/Luna bug
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  #3  
Old 12-10-2018, 04:19 PM
gaseous (Patrick)
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I've just this morning taken delivery of 1.25" and 2" OIII Lumicon filters from EyepiecesEtc.com. With the Brisbane weather looking like being wet until Easter I won't be able to give an opinion for a while yet, but they've had good reviews.



DGM Optics do a NPB filter which picks up OIII as well as Ha and Hb - it's a great filter which I use quite a lot. Tends to give a more orange rather than green cast to the view, which I prefer over the green of a straight OIII.
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Old 12-10-2018, 04:25 PM
gaseous (Patrick)
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Here's a comparison chart done by Phil Harrington from Astronomy magazine comparing a lot of different brands/style of filters. The article is pretty old and some of the filters may have been upgraded/discontinued since then, but it might be worthwhile reading.
Attached Files
File Type: pdf 0805_nebula_filters(1).pdf (349.7 KB, 21 views)
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Old 12-10-2018, 04:47 PM
astro744
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Lumicon
Astronomik
Thousand Oaks


... in that order. However Lumicon has gone through a generational change so I cannot comment on the current offering. Thousand Oaks has incredible jet black background with white nebulousity (eta carina nebula) but I feel it would benefit from a larger aperture than the 10.1" f6.4 Newtonian I was comparing with the other on.

I am also partial to the original Tele Vue O-III Bandmate filter as it is a bit broader that the three above and gives a very natural background with more stars visible but also plenty of nebulousity. This filter has now been replaced with the Type 2 version by Tele Vue in a partnership with Astronomik but I have not used the latter for comparison.

See http://www.televue.com/engine/TV3b_page.asp?id=24
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Old 12-10-2018, 04:57 PM
gaseous (Patrick)
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Don Pensack, who runs EyepiecesEtc, made a brief comment on the new Lumicon OIII Gen 3 filters on the Cloudy Nights forum and spoke highly of them (prompting me to part with a largish wad of cash).
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Old 12-10-2018, 06:08 PM
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https://searchlight.semrock.com/?sid...c-ed9a28d1cd58
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  #8  
Old 13-10-2018, 05:48 PM
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MattT (Matthew)
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Have just taken the plunge with a Lumicon generation 3 O-III filter.

Seems to be the no regrets filter

yaall.....and Adam the Pan 35 with UHC is fab
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  #9  
Old 13-10-2018, 08:23 PM
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Good choice Matt.

The Baader/Celestron OIII is too narrow. The DGM OIII I had was good but the Lumicon OIII I have now is better!
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