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Filter Transmission Charts

Filters
46 replies to this topic

#41 Andrea B.

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Posted 31 August 2018 - 14:23

This is a new filter to me. Do you have a link for it? What is its purpose? Thanks!!!
Andrea G. Blum
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#42 JMC

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Posted 31 August 2018 - 15:04

View PostAndrea 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.

#43 Cadmium

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Posted 31 August 2018 - 19:49

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".
Posted Image

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


#44 JMC

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Posted 01 September 2018 - 07:45

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

#45 Cadmium

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Posted 01 September 2018 - 08:24

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.


#46 JMC

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Posted 01 September 2018 - 09:34

No problem Steve. It's 3.5mm thick.

#47 Cadmium

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Posted 01 September 2018 - 16:19

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.

Attached Image: U330_U325C_Nikon.jpg

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