Ultra Violet dedicated Camera or RED UV OLPF

[Guilherme Belchior Afonso]

Hi guys,

I have a shooting to make using a UV camera. I am in Portugal and I can´t find any UV camera here, not even in Europe. I found this guys http://www.lifepixel.com/shop/ultraviolet-camera-conversion/canon-dslr-uv-camera-conversion They convert Canon cameras. But it takes about 1 month for all the process.
I have also found this https://www.astromarket.org/filters...astrodon-inside-for-canon---ad40d?language=en
And the local Canon could replace it here in Portugal, but I don´t now if it does the same effect.
Anyone knows other option? I have a Scarlet Dragon, is there anyway to use it? Red as a IV OLPF, is there any third party UV OLPF?

Thanks

Guilherme

 

[Gavin Greenwalt]

My guess is that your best bet would be to use the Full Spectrum Kipper Tie OLPF and then filter everything except UV. I don't know though if the sensor glass also filters UV, it very well may.

http://kippertie.com/?product=full-spectrum-zero-lowpass-filter-for-dragon

 

[Guilherme Belchior Afonso]

Thanks Gavin, I´ll try to contact kippertie and ask if they have a solution.

My guess is that your best bet would be to use the Full Spectrum Kipper Tie OLPF and then filter everything except UV. I don't know though if the sensor glass also filters UV, it very well may.

http://kippertie.com/?product=full-spectrum-zero-lowpass-filter-for-dragon

 

[Dr. Sassi]

I asked the support a while ago, if and where UV filtration could happen. No final answer so far.



Note that you need special lenses and of course an UV pass filter for that, but I guess you are aware of that.

http://en.wikipedia.org/wiki/Ultraviolet_photography

Quote from wiki:

"Most types of glass will allow longwave UV to pass, but absorb all the other UV wavelengths, usually from about 350 nm and below. For UV photography it is necessary to use specially developed lenses having elements made from fused quartz or quartz and fluorite. Lenses based purely on quartz show a distinct focus shift between visible and UV light, whereas the fluorite/quartz lenses can be fully corrected between visible and ultraviolet light without focus shift. Examples of the latter type are the Nikon UV-Nikkor 105 mm f/4.5, the Coastal Optics 60 mm f/4.0, the Hasselblad (Zeiss) UV-Sonnar 105 mm and the Asahi Pentax Ultra Achromatic Takumar 85 mm f/3.5[SUP][1][/SUP]"

I haven't had a chance so far to check how pure "plastic" lenses would work for that.

 

[Guilherme Belchior Afonso]

Thanks Dr. Sassi!

They also haven´t replied me... I´m trying other solution in the UK. Let´s see if it works.

I asked the support a while ago, if and where UV filtration could happen. No final answer so far.

Note that you need special lenses and of course an UV pass filter for that, but I guess you are aware of that.

http://en.wikipedia.org/wiki/Ultraviolet_photography

Quote from wiki:

"Most types of glass will allow longwave UV to pass, but absorb all the other UV wavelengths, usually from about 350 nm and below. For UV photography it is necessary to use specially developed lenses having elements made from fused quartz or quartz and fluorite. Lenses based purely on quartz show a distinct focus shift between visible and UV light, whereas the fluorite/quartz lenses can be fully corrected between visible and ultraviolet light without focus shift. Examples of the latter type are the Nikon UV-Nikkor 105 mm f/4.5, the Coastal Optics 60 mm f/4.0, the Hasselblad (Zeiss) UV-Sonnar 105 mm and the Asahi Pentax Ultra Achromatic Takumar 85 mm f/3.5[SUP][1][/SUP]"

I haven't had a chance so far to check how pure "plastic" lenses would work for that.

 

[John Marchant]

I'm currently working on this one for some more detail. Experience so far would suggest that UV work of certain kinds is possible. One thing that muddies the water is that most UV bandpass filters also pass a certain amount of IR, and I believe many people may be mistaking one for the other in a final image.

Production is keeping me busy these last few weeks, but I will have some results to share soon and I'll update our Full Spectrum OLPF product information accordingly.

 

[ericyoung]

The other thing is that silicon sensors just aren't very UV sensitive, so even if you succeed in making an OLPF that passes significant UV, you'll need a tonne of UV light for exposure!

 

[Guilherme Belchior Afonso]

Thanks guys for all the help!
I managed to get a camera in the UK ready to shoot UV. Let´s see how it goes

 

[Dr. Sassi]

I got an e-mail from RED about UV. I specified the use of UV based as described in the
ASC Manual, Edition 10. Page 207-214. "Day-for-Night, Infrared and Ultraviolet Cinematography".

The fine print of the e-mail tells me that I'm not allowed to share the content of the e-mail.

 

[RivaiC]

The more appropriate question to be ask is what is the wavelength that RED sensor can see ? UV-A 400-315 nm ? I dont think this should be a secret.

R

 

[Kemalettin Sert]

I'm currently working on this one for some more detail. Experience so far would suggest that UV work of certain kinds is possible. One thing that muddies the water is that most UV bandpass filters also pass a certain amount of IR, and I believe many people may be mistaking one for the other in a final image.

Production is keeping me busy these last few weeks, but I will have some results to share soon and I'll update our Full Spectrum OLPF product information accordingly.

can we see some samples?