Comments on: Flash Trigger http://www.the-f-stop.com “You don't take a photograph, you make it.”
Ansel Adams Tue, 31 Jan 2012 12:10:30 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: Jon http://www.the-f-stop.com/flash-trigger/comment-page-1/#comment-1949 Jon Fri, 06 Jan 2012 01:51:21 +0000 http://www.the-f-stop.com/?page_id=770#comment-1949 The trigger applies a voltage to the flash centre pin in the same way a PC sync socket does. I think most cameras employ a short between 2 pins for their shutter release which might not be compatible. You would need to bring both pins into the circuit and connect them with a gate, preferably an opto isolated one. That gate could be driven by the existing flash trigger circuit from the Flash Instant/Delayed outputs. I'm sure info on the shutter releases would be available online. The trigger applies a voltage to the flash centre pin in the same way a PC sync socket does. I think most cameras employ a short between 2 pins for their shutter release which might not be compatible. You would need to bring both pins into the circuit and connect them with a gate, preferably an opto isolated one. That gate could be driven by the existing flash trigger circuit from the Flash Instant/Delayed outputs. I’m sure info on the shutter releases would be available online.

]]> By: Daniel http://www.the-f-stop.com/flash-trigger/comment-page-1/#comment-1948 Daniel Fri, 06 Jan 2012 00:01:09 +0000 http://www.the-f-stop.com/?page_id=770#comment-1948 Dear Jon, your trigger is very interesting and I would like to ask you, if is possible to use it as s remote for camera, or it is just for a flash? Thank you Dear Jon, your trigger is very interesting and I would like to ask you, if is possible to use it as s remote for camera, or it is just for a flash? Thank you

]]> By: Jon http://www.the-f-stop.com/flash-trigger/comment-page-1/#comment-1915 Jon Thu, 24 Nov 2011 02:55:22 +0000 http://www.the-f-stop.com/?page_id=770#comment-1915 It depends on the model and sadly data is often not published in manuals. As noted on this site: http://chdk.wikia.com/wiki/Samples:_High-Speed_Shutter_%26_Flash-Sync "Xenon flash units usually control their flash output by duration rather than output level. So when used on the dimmest setting these cameras are shortening the flash output to 1/60000th of as second." So it is essential to use the lowest power available on you flash and then try a simple test like the one here: http://www.scantips.com/speed.html Or Google your flash model with the words "high speed" and someone may have already tested it. It depends on the model and sadly data is often not published in manuals. As noted on this site:
http://chdk.wikia.com/wiki/Samples:_High-Speed_Shutter_%26_Flash-Sync

“Xenon flash units usually control their flash output by duration rather than output level. So when used on the dimmest setting these cameras are shortening the flash output to 1/60000th of as second.”

So it is essential to use the lowest power available on you flash and then try a simple test like the one here:
http://www.scantips.com/speed.html

Or Google your flash model with the words “high speed” and someone may have already tested it.

]]> By: erica http://www.the-f-stop.com/flash-trigger/comment-page-1/#comment-1914 erica Wed, 23 Nov 2011 05:43:45 +0000 http://www.the-f-stop.com/?page_id=770#comment-1914 I have a low end external flash. Does it need to have the capacity of 1/30000s? I have purchased and am currently putting together the flash trigger but a new nikon flash is not really in the budget for me at the moment. I have a low end external flash. Does it need to have the capacity of 1/30000s? I have purchased and am currently putting together the flash trigger but a new nikon flash is not really in the budget for me at the moment.

]]> By: Jon http://www.the-f-stop.com/flash-trigger/comment-page-1/#comment-1903 Jon Tue, 08 Nov 2011 08:38:38 +0000 http://www.the-f-stop.com/?page_id=770#comment-1903 Locally the box came from Jaycar but I am sure it can be sourced internationally on Farnell or Digikey. Something similar on Farnell (UK): http://uk.farnell.com/multicomp/bc3/case-handheld-pp3-black/dp/301700 No exactly the same but it does not matter that much as long as it holds a 9V battery. Locally the box came from Jaycar but I am sure it can be sourced internationally on Farnell or Digikey.

Something similar on Farnell (UK):
http://uk.farnell.com/multicomp/bc3/case-handheld-pp3-black/dp/301700

No exactly the same but it does not matter that much as long as it holds a 9V battery.

]]> By: WalidSaladin http://www.the-f-stop.com/flash-trigger/comment-page-1/#comment-1902 WalidSaladin Tue, 08 Nov 2011 06:35:44 +0000 http://www.the-f-stop.com/?page_id=770#comment-1902 Thank you for the post. This is exactly what I was looking for. Just a quick question: Where did you buy the casing? And did you modify it? I'm new to electronics, so excuse me if it's a stupid question. Thank you for the post. This is exactly what I was looking for.

Just a quick question: Where did you buy the casing? And did you modify it? I’m new to electronics, so excuse me if it’s a stupid question.

]]>