Author Topic: Variable eyepiece polarizing filters worth it?  (Read 4554 times)

Kenneth Brown

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Variable eyepiece polarizing filters worth it?
« on: December 28, 2017, 02:09:37 AM »
Tonight viewing the moon even through the clouds I realized I don't have any "moon" filters for my 2" eyepieces.

Doing a bit of ebay and google work I have stumbled into these variable filters from ICE, Gosky and Orion. I think they all seem to advertise 1% to 40% adjust-ability.

Are these worth owning or are they junk and I am better off just buying a fixed percentage filter?

Thanks in advance.



memeforvi

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Re: Variable eyepiece polarizing filters worth it?
« Reply #1 on: December 28, 2017, 04:05:18 AM »
I have a variable polarizing filter. I won't view the moon without it, I can tone the glare from the moon with it to a more comfortable level.

Jorge Herbert

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Re: Variable eyepiece polarizing filters worth it?
« Reply #2 on: December 28, 2017, 08:19:40 PM »
Yep, I also have one and it's extremely helpful when the moon is full, as it is a pretty eye watering experience without it.

chionewssesu

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Re: Variable eyepiece polarizing filters worth it?
« Reply #3 on: December 30, 2017, 06:33:47 AM »
Well worth it, even a half moon is to bright for me.

curnarenche

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Re: Variable eyepiece polarizing filters worth it?
« Reply #4 on: December 30, 2017, 09:54:13 PM »
While I rarely use filters a while back I grabbed this one to test. My idea was to put half on the diagonal and the other half on the eyepiece. It simply does not work like this nor will it work when mated and used on the diagonal, will not come to focus. It does however work when on the eyepiece and it does quite well but I wanted to split the filter and just dial in what was needed by rotating the eyepiece and this just made it useless for me. Removing the eyepiece to adjust for changing conditions for example is not what I wanted.Peace...

Jason Muse

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Re: Variable eyepiece polarizing filters worth it?
« Reply #5 on: December 31, 2017, 06:30:17 AM »
I have several filters designed for dimming the view of the moon, I acquired them along with a telescope.

They work as advertised but I find I prefer just to let my eye adapt to the moon's brightness. By daytime standards, the moon is not particularly bright, try viewing it during the day.. As amateur astronomers, dark adaption is a powerful tool but with objects like the moon and planets, it can be counterproductive.

Jon

Jason Pederes

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Re: Variable eyepiece polarizing filters worth it?
« Reply #6 on: December 31, 2017, 05:42:41 PM »
I agree with Jon. I usually let my eye adopt. Some times I use aperture mask to reduce the glare. Several refactors come with two stage dust cap. On my ED80 (also true for ST-80) if you remove the smaller cap it becomes a 43mm scope which is ideal for viewing very bright objects such as Moon or Venus. I have never used a moon filter.

safrioheartli

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Re: Variable eyepiece polarizing filters worth it?
« Reply #7 on: January 03, 2018, 02:45:34 PM »
As a newbie, everything for me is a new and fresh discovery... and due to observing conditions where I am, I am viewing the moon a lot... what I have discovered is that when the moon is around 60% illuminated, a filter is extremely desirable as the brightness at that point is painful TO ME. And that is with a conscious effort to not dark adapt... (dark adaption in my area is largely a myth anyway, due to all the lighting here, so NOT dark adapting requires little effort, but that is another story). I use a 13% Orion filter, but have considered an adjustable polarizing filter so that I can dial it in to the best setting. I don't think I lose a lot of detail with the 13%, maybe none at all, because without it, I can barely tolerate the brightness.

It is a highly personal decision, so get one and try it... you'll either like it or you won't... If you don't, you can easily sell it...

Best regards!

CB

Edit for clarity...

clicpostreta

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Re: Variable eyepiece polarizing filters worth it?
« Reply #8 on: January 03, 2018, 03:47:16 PM »
I use them myself. I find too much glare disturbing. YMMV

grateganir

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Re: Variable eyepiece polarizing filters worth it?
« Reply #9 on: January 04, 2018, 07:09:10 AM »
Instead of the variable polarizing filter assemble I have 2 polarizing filters. One goes on the diagonal and the other on the eyepiece. Rotate the EP for variable control, same result less spendy.

Rick Reiter

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Re: Variable eyepiece polarizing filters worth it?
« Reply #10 on: January 08, 2018, 06:18:11 PM »
Quote
As a newbie, everything for me is a new and fresh discovery... and due to observing conditions where I am, I am viewing the moon a lot... what I have discovered is that when the moon is around 60% illuminated, a filter is extremely desirable as the brightness at that point is painful TO ME. And that is with a conscious effort to not dark adapt... (dark adaption in my area is largely a myth anyway, due to all the lighting here, so NOT dark adapting requires little effort, but that is another story). I use a 13% Orion filter, but have considered an adjustable polarizing filter so that I can dial it in to the best setting. I don't think I lose a lot of detail with the 13%, maybe none at all, because without it, I can barely tolerate the brightness.

It is a highly personal decision, so get one and try it... you'll either like it or you won't... If you don't, you can easily sell it...

Best regards!

CB

Edit for clarity...

Last night I used a 25% ND filter. I should have used 13%. I can actually see more detail
with the ND filter in place.  I think the moon is just too bright for the eye.

trigitsipo

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Re: Variable eyepiece polarizing filters worth it?
« Reply #11 on: January 10, 2018, 09:21:27 AM »
Funny how things go sometimes.,

I got back into the hobby recently and this thread reminded me that the last thing I was planning to buy before I stepped away was the Lumicon2" Variable Polarizer Filter - but I've found out that Lumicon is in a state of flux whilst another vendor completes acquisition..,

Guess I'll wait 'n see

Best.,

skybsd

mingchepspatu

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Re: Variable eyepiece polarizing filters worth it?
« Reply #12 on: January 11, 2018, 03:32:39 AM »
Quote
Instead of the variable polarizing filter assemble I have 2 polarizing filters. One goes on the diagonal and the other on the eyepiece. Rotate the EP for variable control, same result less spendy.

Forgive my ignorance, but this actually works? Never thought of this. What product are you using?Thanks...

unverjacea

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Re: Variable eyepiece polarizing filters worth it?
« Reply #13 on: January 11, 2018, 04:11:17 AM »
I don't own a variable polarizing filter, but of the filters I do own my favourite to use the on the moon is my Orion "Mars filter".
It lends a strong pink tint to everything, but I really like how it knocks down the glare and (seemingly) enhances contrast.
Sent from my D6603 using Tapatalk

ramapali

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Re: Variable eyepiece polarizing filters worth it?
« Reply #14 on: January 11, 2018, 04:18:53 PM »
I had a 13% filter and got a variable polarizing replacement for it. That was very valuable for me because the extra filter in place degraded the detail in the views so badly that it made me question the whole need for moon filters and stop using them at all. Now I get really fine lunar detail and great contrast with no filter.
The moon's bright sometimes. The human eye is designed to adapt to much higher brightness situations.
Other folks like 'em. Fine with me but if you're trying to make up your mind, at least give no-filter lunar observing a fair chance.