[meteorite-list] Thin Section-Xpol--somewhat solved

From: John Lutzon <jl_at_meteoritecentral.com>
Date: Fri, 20 May 2016 13:35:20 -0400
Message-ID: <62559287363E448594A9EF52768FFFFE_at_Home>

Dear List,

Many thanks to those who emailed me regarding my questions.

Due to these emails, my "lost" memory was somewhat refreshed.
Someone actually sent me some 4 year old correspondence that
we had regarding this same subject.

You don't know what you don't know.....
In my case, i didnt know that i forgot that i didn't know that i didn't
have the correct equipment for the quality pics i expected.

"adaquate" objectives are just that--adaquate for casual viewing but
not for the high quality pics i'm looking for.

Back to the drawing board for me.

Thanks All,
John #1896

----- Original Message -----
From: "John Lutzon" <jl at lutzon.com>
To: <meteorite-list at meteoritecentral.com>
Sent: Thursday, May 19, 2016 5:36 PM
Subject: Thin Section-Xpol


Greetings List,

I hope all is well with everyone.
After a un-planned hiatus, i'm beginning to reassemble some of my equipment
and again hope to take pics of TS's. In the past (before my coma) I remember
taking some decent pic's but never recorded scope, lighting or camera settings.
I will eventually re-figure those settings.

Years ago, regarding one of my MPOD TS pics, a comment was made
(by a well known and respected member) that my colors appeared "off".
He inquired what objectives I was using. I have several microscpes with
"adaquate" objectives.

Thus, my questions (finally):

Is the distance to the object pertinent to the bottom/top polarizer
on the Z axis?

Assuming Both polarizers are at 0 on the Y axis (extinction)---IS there
a certain angle/degree on the X axis (either polarizer) that shows the "true"
colors of a particular meteorite? Or, does one need to isolate a particular
mineral color and the remnant colors are what they are??

As always, All best
John Lutzon
#1896
Received on Fri 20 May 2016 01:35:20 PM PDT