Footleg led photography
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Cave Photography Using Super Bright LEDs by Footleg Cave Technology Symposium Yorkshire 2010
Transcript of Footleg led photography
Cave Photography Using
Super Bright LEDs by Footleg
Cave Technology SymposiumYorkshire 2010
Steve Sharp – Southern Streamway Waterfall
Steve Sharp – Swildons Hole Cascade
Photos taken using cavers lights!
Scurion™ P7“If you need a lot of light, like for photography, filming or if you are fortunate to have caves much larger than railway tunnels, this is for you!” Retails in UK for around £450
SSC P7 LED
Max. 900 lumens
3.6-3.7V 2.8A
• Generates a lot of heat!
• Scurion only drives it at ~490 lumens
(StenLight Rebel 100 ~360 lumens)
SSC P7 and Constant Current Driver
2.8A current
for between
5.5 -13V
input voltage
P7 LED and Driver Circuit
• Connect trailing red wires with a switch
• Connect a battery box to the battery clip
Other Parts and Costs
A big cheap heatsink
P7 LED £10.50
Driver Circuit £ 8.00
Case £20.00
Waterproof switch £ 0.70
Battery box £ 1.00
8 x AA NiMH cells £10.00
Heatsink £ 4.30
Thermal adhesive £ 5.50
Wire £ 1.00
Total £61.00 A waterproof metal case with switchSomething to hold it all
together
Heatsink cut to size
Heat Sinking the Driver Circuit
Adhesive tape
Aluminium plate
Adhesive tape
Driver circuit board
Adhesive tape
Aluminium plate
Complete Case Contents
Finished Unit
Twin P7 Lamp by Rob Eavis
P7 Lights in Use
Camera: Canon EOS 5DAperture: f 6.3Exposure: 1.3sISO: 640
P7 Lights in Use
Camera: Canon EOS 5DAperture: f 11Exposure: 4sISO: 400
P7 Lights in Use
Camera: Canon EOS 5DAperture: f 11Exposure: 4sISO: 400
Pros/Cons of S.I.T. (Sustained Illumination Technique)
See exactly how the picture will lookSee exactly what is in
the frameFine tune the lightingCan see what you are
doingAutofocusAuto exposureSuper wide angle
lighting
Long exposuresRequires tripodMotion blur
Models must stay motionless
Water blurOption to use lower
ISO (less noise)Light painting
Lights keep your hands warm!
1.3 second exposure
Motion Blur
4 second exposure
Motion Blur
Motion Blur - Water
Steve Sharp Canon G10 2.5s f 2.8 ISO 200
Taken on ICS group caving trip
Kickapoo Cavern
Kickapoo Cavern
Kickapoo Cavern
LEDs for Video Lighting
