NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Observations with pocket sextant in the Baltic CROSS POST
From: hellos
Date: 2006 Jul 3, 15:58 -0500
Alex-
If both F. and C&P checked it out your SNO-T, what exactly did they check? How?
As against what didn't meet the specs? I would expect there are many avenues for
error (such as imprecise or uneven engraving or division on the arc) that they
wouldn't check for.
I had thought you were happy with the instrument, didn't realize it wasn't
meeting the specs it was rated for.
I can't tell you how to have confidence in the quality of any new or used
instrument, at some point you take it on faith backed up by some type of
warranty from the seller.
I have an old pair of Zeiss binoculars that use similar filtering, a pair of
"tobacco" colored inserts in screw-in rings for the eyepieces. You might try to
contact Tiffen or another photographic filter maker. If you can give them the
pitch and diameter for the threads (either measured or researched) they might be
able to supply you with something reasonably. As a temporary kludge, I would
suggest a trip to an auto parts store and $5 spent on a foot of cheap "window
tinting" material. I know, it won't be optical quality <G> but you should be
able to put a tiny spot of it in the eyepiece to get a temporary tint that would
le you do some sun sights whilst waiting for a better solution.
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To post to this group, send email to NavList@fer3.com
To , send email to NavList-@fer3.com
-~----------~----~----~----~------~----~------~--~---
From: hellos
Date: 2006 Jul 3, 15:58 -0500
Alex-
If both F. and C&P checked it out your SNO-T, what exactly did they check? How?
As against what didn't meet the specs? I would expect there are many avenues for
error (such as imprecise or uneven engraving or division on the arc) that they
wouldn't check for.
I had thought you were happy with the instrument, didn't realize it wasn't
meeting the specs it was rated for.
I can't tell you how to have confidence in the quality of any new or used
instrument, at some point you take it on faith backed up by some type of
warranty from the seller.
I have an old pair of Zeiss binoculars that use similar filtering, a pair of
"tobacco" colored inserts in screw-in rings for the eyepieces. You might try to
contact Tiffen or another photographic filter maker. If you can give them the
pitch and diameter for the threads (either measured or researched) they might be
able to supply you with something reasonably. As a temporary kludge, I would
suggest a trip to an auto parts store and $5 spent on a foot of cheap "window
tinting" material. I know, it won't be optical quality <G> but you should be
able to put a tiny spot of it in the eyepiece to get a temporary tint that would
le you do some sun sights whilst waiting for a better solution.
--~--~---------~--~----~------------~-------~--~----~
To post to this group, send email to NavList@fer3.com
To , send email to NavList-@fer3.com
-~----------~----~----~----~------~----~------~--~---