DIY – Remote flash trigger with opto-isolator : Part – I

DIY: Remote Light Trigger with opto isolator  to protect camera. 

Recently i decided to photograph a lot of figurines / curios which were lying around at home. For this, i needed to setup a product  table with a pure white background and also the right set of strobes around it.  Well, i had 2 strobes from ProPhoto and only one  Yangano flash for my 450D. This lead to a delima on  how to  get pure white background and still leave 2 strobes for lighting the product itself. Not wanting to invest in one more flash, i scratched my head and remembered that my dad had an old Vivitar flash from the Canon film days. The problem was, that it was really old and i had no way of syncing it with the other flash / strobes, so this resulted in more head scratching , conclusions :-


  1. The flash probably had a trigger voltage which would blow out modern cameras or triggering devices
  2. The flash had a very old adaptor which modern cords did not fit into

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Geo-tagging photographs – Adding location information to your photographs

Discovered a really cool way to add location information to your images (i.e. Geo-tagging photographs ) that too without buying a GPS unit for your camera.

Heres how :-

1. Your mobile phone must have GPS on it.

2. install any of the following apps on the mobile (short list, their could be many more)

  • Latitude from Google
  • GPS logger for Andriod
  • GPS Essentials

Basically you need a phone which can log  GPS data to either the internet or to a file. If you use latitude enable history in the options.

3. Before heading out :-

  • Make sure your camera and mobile clocks (time) are in sync
  • Start the applicaiton from #2 above on your mobile

4. Finish your shoot, come back and switch off the application (else it will keep draining your battery)

  • If you sue latitude the data will on the google latitude site
  • if others, it will be on the mobile so transfer it to your computer

5. Convert the data to a GPX file (with this step you have the latitude and longitude with timestamp recorded perdiodically). You can use

6. Download images from camera to your computer

7. Use any of the following to add the location information to your photos

  • GEOsetter
  • GPicSync

Voila, you are all set !!!!!