Free Shipping on ALL Products
camera reviewsbest cameraslens reviewsphotography tipscamera forumvideo toursphotography bookssupport me
It is currently Wed Aug 20, 2014 8:59 am

All times are UTC




Post new topic Reply to topic  [ 4 posts ] 
Author Message
PostPosted: Sun Mar 01, 2009 1:58 pm 
Offline
User avatar

Joined: Fri Dec 28, 2007 3:05 pm
Posts: 1092
I have just taken delivery of some high speed flash equipment from highspeedflash dot com. These are the very first water splash shots taken with a "Pro" unit (discharge time 50us).

Image

This is not a studio set up yet for pretty pictures, just a measurement of stopping power and exposure. ISO100, f#22, 4-feet, Canon 40D, 100mm macro lens.

If I get some time later today I will try out the "Ultra" unit - discharge time 9us!!!

Greg

_________________
Nexstar 11 GPS, 2 x Sky 90, M25C, MaximDL, Photshop CS3, Noel Carboni's Photoshop actions, 7 foot Pulsar fibreglass dome, Canon 40D, 100mm macro lens, 28-200mm zoom lens, 17-55mm f#2.8 zoom lens, 100-400mm zoom lens, 1.4x converter, 2x converter.
http://www.newforestobservatory.com/
http://www.flickr.com/photos/12801949@N02/


Top
 Profile  
 
 Post subject:
PostPosted: Sun Mar 01, 2009 3:18 pm 
Offline
User avatar

Joined: Sun May 25, 2008 12:48 pm
Posts: 8022
Location: UK
Looks like fun :) But for perspective, any idea what a "normal" flash pulse time is?

_________________
Canon DSLRs: 7D, 5D2, 1D, 600D, 450D full spectrum, 300D IR mod
Lenses: EF 35/2, 50/1.8, 85/1.8, 135/2+SF, 28-80 V, 70-300L, 100-400L, TS-E 24/3.5L, MP-E 65, EF-S 15-85 IS
3rd party: Zeiss 2/50 makro, Samyang 8mm fisheye, Sigma 150 macro, 120-300 f/2.8 OS, Celestron 1325/13
Tinies: Sony HX9V.


Top
 Profile  
 
 Post subject:
PostPosted: Sun Mar 01, 2009 3:40 pm 
Offline
User avatar

Joined: Fri Dec 28, 2007 3:05 pm
Posts: 1092
A "normal" flash pulse depends on the energy you work at. A full power pulse from a typical camera mounted flashgun can easily reach 1ms (1000 us or 1/1,000 th second). If you cut power down to 1/64th or so, where you have around a Joule or 2 of energy to play with, you can get down to 25us or 1/40,000 th second.

The "Pro" unit is 150 Joules in 1/20,000 th second.
The "Ultra" unit is 30 Joules in 9us, that's less than 1/100,000 th second.

Greg

_________________
Nexstar 11 GPS, 2 x Sky 90, M25C, MaximDL, Photshop CS3, Noel Carboni's Photoshop actions, 7 foot Pulsar fibreglass dome, Canon 40D, 100mm macro lens, 28-200mm zoom lens, 17-55mm f#2.8 zoom lens, 100-400mm zoom lens, 1.4x converter, 2x converter.
http://www.newforestobservatory.com/
http://www.flickr.com/photos/12801949@N02/


Top
 Profile  
 
 Post subject:
PostPosted: Sun Mar 01, 2009 4:44 pm 
Offline
User avatar

Joined: Sun May 25, 2008 12:48 pm
Posts: 8022
Location: UK
Thanks for the shedding light on the subject :D

_________________
Canon DSLRs: 7D, 5D2, 1D, 600D, 450D full spectrum, 300D IR mod
Lenses: EF 35/2, 50/1.8, 85/1.8, 135/2+SF, 28-80 V, 70-300L, 100-400L, TS-E 24/3.5L, MP-E 65, EF-S 15-85 IS
3rd party: Zeiss 2/50 makro, Samyang 8mm fisheye, Sigma 150 macro, 120-300 f/2.8 OS, Celestron 1325/13
Tinies: Sony HX9V.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 4 posts ] 

All times are UTC


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
Jump to:  

All words, images, videos and layout, copyright 2005-2012 Gordon Laing. May not be used without permission.
/ How we test / Best Cameras / Advertising / Camera reviews / Supporting Camera Labs

Webdesign by Alphabase IT
Powered by phpBB® Forum Software © phpBB Group