Using polarizers

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Using polarizers

#1 Post by Cyclops » Mon Jun 12, 2017 8:30 am

I was given a pair of 30.5mm polarisers, and when put together one way and rotated they act like polarisers that I'm familiar with on my camera, reducing reflections. But if I swap them around then look through them I see colours. So I tried them on my scope, placing one on the built in lamp and one over the eyepiece. I tried various transparent items under the objective from clear plastic to salt crystals but no matter which configuration I used I didn't see any difference.

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Re: Using polarizers

#2 Post by 75RR » Mon Jun 12, 2017 10:20 am

Hi Cyclops,
here is a link to a previous post with a diagram showing a convenient way to place the polarizers.
Also scroll down to see the following post by gekko re linear polarizers.


Sugar, if placed on a slide with a drop of water and allowed time to melt and then dry produces some very pleasing polarized effects.
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Re: Using polarizers

#3 Post by PeteM » Wed Jun 14, 2017 2:29 am

If what you have in hand are circular polarizers (more common for camera use) rather than linear, try flipping them. In my experience (with just one of the polarizers a cheap Chinese circular type), one orientation will usually give a linear effect. Could be a single bit of linear polarizer film might get you going?

It's so easy to get breathtaking images with a simple and cheap polarizing setup, one would think every scope would include it.

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Re: Using polarizers

#4 Post by Radazz » Sun Jul 02, 2017 11:48 am

When you get the scope set up, try this...
Crush up an Extra Strength Tylenol and devolve it in alcohol.
Take some of the muck you get and spread it thinly on a slide.
Put the slide on the stage, and drop some alcohol on the thin paste.
Stay on the 10x objective so you keep some distance, and scan around the slide.
It should look like tiny silver flecks boiling in the alcohol.
When the alcohol evaporates enough, the residue begins to crystallize, and the crystals grow fast and right before your eyes.


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Re: Using polarizers

#5 Post by billbillt » Sun Jul 02, 2017 4:04 pm

Very beautiful and mesmerizing!.. thanks for sharing...


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