Optics Technology Neutral Density Filter Set

Description

Optics Technology Neutral Density Filters
For sale- a set of Optics Technology Neutral Density Filters as pictured.
The sale includes as you can possibly see the spectral response chart for them taken in 1978 using a Cary Spectrometer (I have not taken that out to look at).
They are in a metal case that looks like it was supposed to seal them out from the elements, and there are some desiccant packs that are starting to turn pink.
NASA surplus, the condition code would theoretically indicate they should be functional but that was probably years ago.
I have no idea what these would be used for so I cannot test them.
Pictures of several selected at random, and I do need to note that not every frame has a filter in it but most do.
All items are sold as is with no warranty offered unless one is specifically stated.
However, IF you pay the Buy It Now price and find a problem that you cannot live with within 14 days of receipt you may return it for a refund of the purchase price.
Accepted Best Offers are strictly as is sale and no returns will be accepted.
Any testing done will be explicitly stated in the listing and any accessory items will also be mentioned or pictured.
If it isn’t pictured or mentioned you can assume it is not part of the sale.
Please check out my other listings for more interesting lab, test and optical equipment.
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Please add a .99 flat rate for shipping anywhere in the continental US (
which does NOT include Alaska, Hawaii, Puerto Rico, Guam or APO/FPO addresses)
.
I will ship via the carrier and level of service of my choice unless we specifically decide on a favored carrier option.
I will, at my option, ship worldwide via USPS for the actual cost as determined by USPS.com.