Invisible Light Photography

Started Apr 23, 2016 | Discussions
OutsideTheMatrix
OutsideTheMatrix Senior Member • Posts: 5,141
Invisible Light Photography
1

Hi all, I have an Olympus EPL6 I want to use for both IR and UV photography without modification. I find that I can do handheld IR photography with it unmodified with both the B+W 092 and 093 filters. With the 092 filter there is a 9.7 stop loss and with the 093 filter there is a 13.3 stop loss, but in both cases the images can still be handheld (1/13 sec exposures at f3.5 and ISO 200 with the 092 and 1.3 sec exposures at f3.5 and ISO 200 with the 093). I get color with both filters, and I set WB by Kelvin temp (2000K for the 092 filter and 4400K for the 093 filter). I do find that setting WB gives me an additional 2/3 stop light loss- any ideas why? With Auto WB the exposures are 2/3 stop faster than they are using the above settings for Manual WB.

Based on the above, do you think it would be a good idea to get the B+W 403 filter? Would the light loss with it be somewhere in between the above two filters? Also what is the proper WB Kelvin temperature to set with this filter?  The 093 filter is really at the limit of how much light loss I find acceptable.

https://infraredatelier.files.wordpress.com/2010/11/common_filters.jpg

(transmission curve of 092/R72 and 093 filters)

https://infraredatelier.files.wordpress.com/2010/11/ug-1.jpg

(transmission curve of 403 filter)

I want to achieve results like this:

http://www.armadale.org.uk/irplusuv.jpg

https://www.flickr.com/photos/stevetla/4989186231/in/photostream/

http://nickspiker.deviantart.com/art/Spectral-Series-Number-B-113065418

https://www.flickr.com/photos/stevetla/4989186231/

This is the transmission curve for the camera's blocking filter.

 OutsideTheMatrix's gear list:OutsideTheMatrix's gear list
Olympus C-7070 Wide Zoom Fujifilm FinePix HS20 EXR Fujifilm FinePix HS50 EXR Olympus E-520 Olympus PEN E-PL6 +4 more
Olympus PEN E-PL6
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