johannes_eriksson

I like the composition and the contrast between the blue and red elements.

Thanks for all the comments. This is what it looks like in color.

Thanks for looking. Comments are very welcome.

Playing with a stogie and high power green laser (808 nm + Nd:YVO4 +

KTP doubler). Can you see the dragon?

An earlier version of this photo had excess noise in the background,

reposting. Critiques are welcome.

Please critique, thanks.

Please critique, thx.

Please critique, thanks.

Comments appreciated.

Thanks for your comment

Nice warm light and reflection, good job.

Please critique. Thanks.

Lighted the match with a focused laser. Exposure is 1/320 at f5, ISO 800.

Please view the large version. Comments very much appreciated.

Comments appreciated.

Comments appreciated.

Thank you for your comments.

Comments on this photo are appreciated. For other images and

information about technique, see my

href="http://www.abo.fi/~joheriks/hispeed">high-speed photography

page

.

I built all the triggers and timers and even the flash for this shot. Ready made triggers are available but really easy to build if you know some electronics. Conventional flash units can be used, but to truly get a bullet in focus durations in the microsecond range are needed. The light source used here is a high-voltage spark gap discharge. I will put up the technical details on a webpage here, see the "How-To" link. It is not yet complete, but hopefully will be in a few weeks.

 

Thanks for your comments.

Object is a cherry tomato. shot with a .177 air gun pellet. The light

source is triggered spark gap connected to capacitor bank charged to

about 25 kV. An optical gate (laser + phototransistor) connected to a

simple 555 timer circuit controls the exposure delay. Both the light

source and trigger circuit are home built from inexpensive parts.

 

I appreciate your comments very much.

Object is a cherry tomato. shot with a .177 air gun pellet. The light

source is triggered spark gap connected to capacitor bank charged to

about 25 kV. An optical gate (laser + phototransistor) connected to a

simple 555 timer circuit controls the exposure delay. Both the light

source and trigger circuit are home built from inexpensive parts.

 

I appreciate your comments very much.

This is a multi-second exposure of a climbing electric arc (Jacob's

ladder), powered by a pair of old microwave oven transformer. The

image has not been manipulated - the face made me jump a little when

first viewing the files on my computer.

Comments appreciated.