46 replies to this topic

[Andrea B.]

This is a new filter to me. Do you have a link for it? What is its purpose? Thanks!!!

[JMC]

Andrea B., on 31 August 2018 - 14:23, said:

This is a new filter to me. Do you have a link for it? What is its purpose? Thanks!!!

It was the one that originally came with the UV Nikkor, Andrea.

[Cadmium]

Yep, the square glass filter seen here, part of the original UV-Nikkor kit.
I could not find any photos of the filter box showing a part name/#, so I don't know what it is technically called. And I don't know if that is what Bjorn meant by "FF filter".

Edited by Cadmium, 31 August 2018 - 19:50.

[JMC]

Steve, the little cardboard box for mine had no part number or name on it other than the "Nikon" logo.

[Cadmium]

Thanks Jonathan. :-)
I am betting that the original square filter that came with the UV-Nikkor is in actuality Hoya U-325c, Which is very similar to U-330, which is the Hoya equivalent to Schott UG5.
I am pretty sure the square filter is made of Hoya U-325c filter glass.
So that means that it has a fairly strong visual transmission, not quite as strong as U-330/UG5, but close, having some blue and even green depending on thickness.
What is the thickness of your square?

Edited by Cadmium, 01 September 2018 - 08:26.

[JMC]

No problem Steve. It's 3.5mm thick.

[Cadmium]

Thanks Jonathan. :-)
Here is a fairly rough and not exactly exact overlay of these three filters, so it looks like I was slightly off on my guess, but still.
Keeping in mind then that the Hoya graphs/data is for 2.5mm thick, and the Nikon filter graph/data is for 3.5mm thick, as Jonathan has noted above.
My overlay may be a little off here and there, but close, best I could do.

Edited by Cadmium, 02 September 2018 - 00:50.