Ideal length of black straw Grid spots?

rgrebby

rgrebby

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Richard
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What is the best length to have the black straws for a DIY grid spot setup?
Im using wide straws.
 
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..
 
Try 5cm to start. Leave a 1cm gap between the face of the flash and the straws.
 
great thanks i'll give it a go. Only have 3 straws though so im not sure i'll have enough
 
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.
 
subseasniper said:
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.
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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
 
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