Exploring UV by Example
Channel: Michael Jenkin
Date: 08/09/2018

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Based on the various emails I have received about my UV playing about, my viewers just need to see how this all comes together. I thought it was time to do an on camera assembly of my gear. A real life example.

It was recently my daughters birthday and she got flowers.
I am dying to check their UV responce and here is my chance.

Not all objects absorb UV. Some do but only slightly or at a spectral frquency lower than my setup can see.

In this case, sadly, the flowers were very boring.
Generally I find yellow flowers showup the best with patterns and patches.
The most impressive so far have been Jerusalem artichokes and sunflowers.
Milk thistles always look ok and Soursobs go so black, you can't see any patterns.
I have found various paints and metals also react in different ways.

As UV does not really have a colour, I have set my camera to a Monochrome profile.

As the lens I am using is attached via adaptors and a bellows, the DOF is very shallow.
I have to set the lens to wide open to let as much light in as able.
I have to get close to the subject and that leaves a very small part of the scene, to be captured in the photo. Different lenses behave in different ways.

In sunlight, a still, I need to use about ISO 800, 8 second exposure.
With my flash, 1/25 sec, ISO 400 is ok. 

As UV has a slight focus shift, I get everything in focus using no Baader U filter and then add the filter. Then I use the bellows to move slightly forward and back until I like what I see.

Video recorded with a Canon EOS 5D Mk iv. (Audio was onboard mic on camera). I use Sandisk SDcards (And CF cards). I use a very cheap bellows, remote shutter release and EOS to M42 convertor in this video. (Check them out on eBay for minimal cost).  I use a canon off shoe flash cable (But any brand to work with canon will do). I have a manfrotto tripod with quick release. It is a Modified Vivitar flash with special Fresnel lens replacement.  I am using a Canon EOS 600d modified full spectrum camera using Spectrosil quartz. I am using a Baader U 2" filter and cheap step up/down rings from ebay. I am using a generic cheap lens cap from ebay for the filter. (The filter is expensive so I am- trying to look after it)
Video compiled with VSDC, photos edited in Photoshop and Intro created with Explaindio

When playing with UV, as always, wear sunglasses, suncream and don't expose people to UV where possible.

If you want to check out my Flash light source, I have linked a video below to it's creation.
If you are struggling to do your own UV photos, look at the Roadblocks video for clues.
If you want to take UV video, there is an example of one I have done, below.

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https://www.youtube.com/playlist?list=PLodEQVE4Lw00cHMUogFptz7aGWV7T9sxJ


..........: UV :..........

INTERESTED IN UV PHOTOGRAPHY?
https://www.youtube.com/playlist?list=PLodEQVE4Lw03oik4aA2yzb-nQ1XszAcPU

Take a look. As always if this content is of interest to you, you might also like my UV blog posts
http://blogs.msmvps.com/mickyj/?s=uv

MY UV PHOTO EXAMPLES
https://www.flickr.com/photos/mickyj_photos/sets/72157631805070468/

MY YOUTUBE UV VIDEOS
https://www.youtube.com/watch?v=6TzxyU8WeQw (IR Leak test on Baader U)
https://www.youtube.com/watch?v=_x9xRbZyzx4 (UV and Suncream)
https://www.youtube.com/watch?v=m7rwIZAzbDY (UV Video test with Canon EOS DSLR)
https://www.youtube.com/watch?v=jO8Fb6VhZ1E (Quick UV Video)
https://www.youtube.com/watch?v=DOuSMuv7gpQ (Convert Vivitar 285hv to full spectrum or UV flash)
https://www.youtube.com/watch?v=UrvViq2Y7OE (Using a Canon for UV photography)
https://youtu.be/pNEIiRXcm_M (Roadblocks to taking UV Photos)

..........: Other :..........

Other interests
Love of 4x4 https://www.youtube.com/playlist?list=PLodEQVE4Lw01u-9e5sN8tXY-TE6PiOuO-
BTP (Information technology) https://www.youtube.com/playlist?list=PLodEQVE4Lw03OXu2YvaA7twRNfWH6TMF4

..........: About Mickyj :..........

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Maylands, South Australia, 5069

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Email: michael.jenkin@usa.net


..........: About the music :..........

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