Author Topic: Which Filters do you like?  (Read 302 times)

ceicomfeara

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Which Filters do you like?
« on: December 24, 2017, 01:00:46 AM »
Hello!
I have a small selection of filters in the Celestron collection and have been trying various ones.  Yesterday evening I tried that the 80A blue filter on Jupiter (my favorite world) and the moon and was so surprised at how much better I could see so many specifics.  I had tried my #12 yellow and56 green, but I found the blue much better with Jupiter.

I was wondering if folks would speak about their experiences with filters and filters they liked best with which items.

There was a fantastic article about filters in a current issue of one of my own astronomy magazines (I can not recall if it was Sky & Telescope or Astronomy) and that is exactly what made me try the Blue filter with Jupiter.  In addition, I have a good summary of the usage of filters on the web and printed it out.  It lists so many filters I didn't even know existed, so that I was wondering what others found to be effective and liked the most.

After seeing the moon and Jupiter during that 80A filter, I am thinking that I may want a few more, so I was wondering which ones appeared to be the most useful.

Also--does anyone use any filters for items like a number of the spiral galaxies?  I am anxious to boost my viewing of these, although I only have an 8" scope.

Thanks!
Amy



Darius Swick

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Re: Which Filters do you like?
« Reply #1 on: December 24, 2017, 04:56:13 AM »
Yes, the 80A is great on Jupiter and doesn't mean it is rather blue.  In addition, it cuts down on the glare of the bright world.  I use that one and a Baader Moon & Skyglow on Jupiter and the moon and a little bit on Saturn.  I haven't used many of the other colours, but others do on Mars.

Among the best filter you should have, is that a narrowband kind of nebula filter.  There are numerous brands available and they'll really help a lot on bringing nebula's.  You might choose to look over from the eyepiece forum and do a search.  One of our members is the filter expert, David Kniesly includes a whole graph of recommendations to use.

Ethan Gechem

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Re: Which Filters do you like?
« Reply #2 on: December 24, 2017, 09:41:20 AM »
Amy attempt this article www.alpo-astronomy.org/mars/articles/FILTERS1.HTM.I just use colored filters for lunar work... red works nicely.  I use a variable polarizing filter to the Moon and sometimes a bright planet.  I use a Baader UHC Nebula filter for certain nebulae.  You can find filters for many unique scenarios so start out slowly and see what your requirements are to reach your goals.ThanksGeorge

artufanchess

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Re: Which Filters do you like?
« Reply #3 on: December 31, 2017, 10:38:11 PM »
For galaxies I suspect you want all the light through to the eye that you can get, really the best is a dark sky. They show up much much better.

The aspect to remember about filters is that they only remove "stuff", it seems that many use the term "increase" with reference to a filter.

Some filters can "increase" the contrast so the object comes out with a greater contrast and so is a bit more obvious. The human eye is actually very sensative to contrast, which is why they work. However you need an object that is effectively dominent in one wavelength or area of the spectrum and the background and surround to this object to have an absence of this bit of the spectrum. The idea being to reduce the background by say 90% and the object by say only 50%, so the object then has a greater contrast to the background and so stands out better. But it's brightness is still reduced. It takes some working out.

Usually the recommended one is an OIII filter - but not for a galaxy as they are in effect all wavelengths (polychromatic), use one on some of the nebulas.

I am one of those that do not own a filter, one day I might but so far managed to escape them.

contiostetti

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Re: Which Filters do you like?
« Reply #4 on: January 01, 2018, 05:21:10 AM »
Hi Amy! I just recently am trying out filters. So far, the #80A has been the best all around filter for me... it has helped with Mars particularly well. And when I accidentally left it on my 14.5mm and then views the moon, I liked it there as well. My other filters... Not so much.

I do intend to get a UHC filter before Orion shows back up this fall and winter...

Best regards!

CB

schemsucopost

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Re: Which Filters do you like?
« Reply #5 on: January 01, 2018, 07:19:10 AM »
Just a personal taste - I've never found the color filters to help that much with planetary/lunar viewing. They are one of my astro purchases that have been collecting dust. But it sounds like others do see the benefit, and I'm more of a DSO observer anyway, so that may slant my opinion.

On the other hand, I found the UHC filter to be extremely helpful on looking at planetary nebula, and while the O-III filter is more specialized, it made the Veil Nebula knock my socks off through my dob.

I'm more focused on imaging now, but that was my experience for the many years of visual observing.

Dave

Vincent Reside

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Re: Which Filters do you like?
« Reply #6 on: January 04, 2018, 06:26:13 AM »
My two most used would be my Baader Neodymium moon & skyglow filter and a Baader 495nm longpass. Both work well for many different targets.
As far as color filters, just 3..... #8, #80a, #58 (#58 seems to work well on mars for me).

And although I do own a nice O-III filter, I only use it when getting out of town.

quiterhardpho

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Re: Which Filters do you like?
« Reply #7 on: January 11, 2018, 05:02:31 AM »
The moon during daylight hours - orange filter
Jupiter - #11 yellow/green
Mars - Magenta
achromatic refractors - #8 yellow

larterpchaka

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Re: Which Filters do you like?
« Reply #8 on: January 11, 2018, 08:16:46 AM »
My favorites filter for Mars, Jupiter, Saturn, is my 2"80A filter.
2" Orion Ultra Contrast for observing> Veil nebula, M/27, as well as a number of otherdeep sky objects.
I like using my 2" variable polarizing filter on the moon and even the planets.

Christopher Patel

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Re: Which Filters do you like?
« Reply #9 on: January 11, 2018, 01:25:43 PM »
Quote
Hi!
Thank you -- I will look at that article and check out the Nebula filter, too. I've been experimenting with the filters I have. I haven't found one I really like for Mars so don't generally use one for that planet. But I did read a comment somewhere that there are filters that help with Nebula, so I do want to look into that.
Thanks,
Amy


Hi Amy

Last night I used a #8 light yellow on mars. I have a 120mm achro and people were suggesting using this to cut down on CA. It definitely helped with seeing on Mars. Before the filter all I had was an orange ball. with the filter I was able to see a polar cap and some different shading. It really didn't change the color a lot either. Seeing was poor, to I may be able to see even more next time out.

I have a v-block (fringe killer) and it has a bigger color change and seems to dim the object more.
I don't have the biggest scopes in the world, and I found that the majority of the filters take away too much
light for my liking.

I do have an 80A and I will try that on some things. Thanks for the pointer.Vic

Jomega Ceo

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Re: Which Filters do you like?
« Reply #10 on: January 12, 2018, 10:07:22 AM »
I like to keep an 80a in the ep box for Jupiter and mars clouds. A deep red can sometimes help on mars as well. A yellow green is quite useful for star testing and sometimes helpful on close doubles if they are lower in the sky.
An OIII and UHC filter are really awesome for planetary nebula in particular and usually pretty good on emission nebula in general. Recently, I have use my UHC filter on Jupiter with some degree of success for seeing the festoons and marking at the edge of the equitorial belts.
Generally speaking, I like planets better unfiltered. I do find it helpful to use a filter to pick out a specific hard to see detail (like martian clouds using the 80a) then go back to unfiltered once I know the detail is there to be seen.
Jeremy

James Holt

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Re: Which Filters do you like?
« Reply #11 on: January 13, 2018, 08:41:04 AM »
Hi Amy - I enjoy your posts.

Over the years my favourite filter has been the O-III, which i like to use on planetary nebulae and certain super nova remnants. My favourite view with the O-III (so far) is the Veil Nebula. The downside is that the background stars are less apparent. The plus side is that more of the nebula's structure is visible. Either way, it's nice to have a choice.

adlaycomsu

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Re: Which Filters do you like?
« Reply #12 on: January 16, 2018, 02:51:01 AM »
I employ a variety of color filters when observing Mars. My favorites are the CC30M (magenta), Wratten #21, and Wratten #80a.

There's more on the use of color filters athttp://alpo-astronom...es/FILTERS1.HTM

For nebulous deep-sky objects, I use narrowband and OIII filters when appropriate.

http://www.prairieas...common-nebulae/

Dave Mitsky

xacypcheati

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Re: Which Filters do you like?
« Reply #13 on: January 18, 2018, 12:29:18 AM »
transmission filter 13% by Orion
you can find about it in this site:
http://myfirsttelesc...kids-telescope/

Kenneth Brown

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Re: Which Filters do you like?
« Reply #14 on: January 18, 2018, 05:46:32 AM »
Lately I have been getting excellent results with an Orion W#15 yellow filter on Mars. I'm very impressed with its performance. For my daylight studies of Venus, I use a W#23A orange filter to enhance the Venusian disk against the bright daytime sky. I am also able to coax out dusky markings with this filter. Works like a charm. Occasionally, I will use the W#15 yellow filter as a change of pace for my studies of Venus with decent results. For solar observing, I have been using the Baader Planetarium Solar Continuum filter for years. It truly is an excellent filter. Within the last year, I have coupled the Continuum filter with the Baader Contrast Booster filter getting very good results with this marriage. Clear skies...

Bill