Polarising filter

[Johndepro]

Hi all,
I have a question. Do Polarizing filters adjust the brightness of images to a better level for observing? Or It is only for photography ?

Best regards,
John

Sent from my GT-I9300 using Tapatalk 2

[Mariner]

Never used one before but comments from seasoned veterans suggests to save your money.

[Johndepro]

I see ... thank you Mariner

Best regards ,
John

Sent from my GT-I9300 using Tapatalk 2

[Great Red Spot]

Hi John, if the moon is too bright, try stopping down the aperture by covering the front with something?

[Johndepro]

Oh ok , thanks for the tip Great red spot



Sent from my GT-I9300 using Tapatalk 2

[MooEy]

Get the 48mm polariser. Thread it into the 2" to 1.25" eyepiece adapter and turn it around for viewing of moon.

[Johndepro]

Ok , thanks mooey

Sent from my GT-I9300 using Tapatalk 2

[joshuapzkpfw]

Hi John,

The effectiveness of the polarizing filter will depend on what objects you inten to view. For viewing of the moon, using a piece of cloth as mentioned above will do the trick haha. I realize that thankfully as I nearly bought multiple filters out of excitement can though they may not be what I need. The area of cover will depend on how bright or dim you want the object to be.

The viewing of other objects may require more dedicated filters.

Let us know how it goes!

Clear skies to you!

[Johndepro]

Hi , joshuapzkpfw
Thank you for the tip.


Sent from my GT-I9300 using Tapatalk 2

[Airconvent]

Polarising filters are typically used to cut glare. Light operates in 2 polarizations. By filtering one away, you can cut the light by half. That's how Polaroids specs work.
And yes, like what has been said, reducing the size of the aperture in anyway will cut the brightness. A piece of opaque circular cardboard with a circular hole in the middle will helps. Just avoid blocking from the centre. That increases central obstruction and reduces contrasts. (For refractors anyway)
Cheers