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Ideal length of black straw Grid spots?
- Thread starter rgrebby
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fraggle101
Not a mermaid
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- Tony
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i think the longer they are then the moreof a spot they will produce.. im sure if you have a look on the Strobist website they will have a tutorial on this..
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Try 5cm to start. Leave a 1cm gap between the face of the flash and the straws.
D
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Take a look here if might be helpful :http://lightingmods.blogspot.com/2007/06/diy-black-straws-snoot-grid-part-1.html Checkout part 2 too.
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You'll need around thirty 5cm lengths of straws to cover a stanard flash head. About ten straws shoul do it. Go to your local Wetherspoons for a drink, they usually have a tray with black straws on it.
Try this url. He has a java applet that figures the angle produced for a given length & width of straw used.
http://paulophotoblog.blogspot.com/2008/01/width-at-widest-point-mm-beam-angle.html
http://paulophotoblog.blogspot.com/2008/01/width-at-widest-point-mm-beam-angle.html
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Very handy indeed - thanks.
I used 2cm length straws, which are great for background lighting.
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- David
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odear i went to weatherspoons and filled my sisters handbag with 50 ish, well i can allways have a few lol
I saw the equation a while back, it was somat like:
angle of diffusion = tan diameter/length
*** do remember to leave a 1cm+ gap between the straws and flash head in case of meltage