UV sensitivity of a Nikon D70

[Physikfan]

The UV sensitivity of a Nikon D70 was measured by using a Hg spectrum. The camera was used without a camera lens in an open spectrometer configuration, consisting of a quartz lens, a reflection grating and a Hg high pressure lamp as a light source:



In addition to the 436 nm and 404 nm lines of the Hg spectrum, the 365 nm line of the Hg spectrum in red is clearly visible.

[Hydron]

Regarding Nikon cameras and UV photography, there's quite a bit of info on older gear on the Natur Fotograf "legacy" site: http://www.naturfotograf.com/index2.html

[AndreiRS]

I don't understand much about this, what wavelenght we can see without the camera? Was there a 4th line after that 3rd red one? I'm supposing if there was, the camera could not capture it.

[Physikfan]

Due to the small sensor of the camera, only three lines of the Hg spectrum are visible at the screen of the camera.
Two of them are in the visible part of the spectrum, the third line is in the UV, 365nm, and is visible as a red line. This red is a false colour.

Here is the experimental setup:



At the right hand side you can see the Nikon D70 without a camera lens.
The other camera Canon 10 D is recording spectra from the UV screen.

Complete Hg spectrum:

[Physikfan]

Here is the link to the software used for calculating the spectra:

https://www.rspec-astro.com/

[Physikfan]

The UV sensitivity of a modified Nikon D70 was measured:



In addition to the 436 nm and 404 nm lines of the visible Hg spectrum, the 365 nm line of the Hg spectrum and two new UV lines in red (false colour) are clearly visible.

[Physikfan]

Here you can modify your Nikon D70 or do it yourself:

https://www.lifepixel.com/tutorials/infrared-diy-tutorials/nikon-d70-d70s

[AndreiRS]

Do you have anything in mind to record with this modified camera?