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mask in front of matte box


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#1 debal banerjee

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Posted 10 September 2009 - 09:35 AM

recently i watched that camera persons sometime uses mask in front of the matte box, i cant understand the utility of such mask. please explain me
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#2 Adrian Sierkowski

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Posted 10 September 2009 - 09:59 AM

It normally has to do with keeping light off of the lens as well as protecting it from any stray debris that might hit it (it's also why you keep an optical flat filter in the mattebox if nothing else) . They are designed for a certain MM range to keep it out of the actual frame.
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#3 debal banerjee

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Posted 12 September 2009 - 12:11 AM

is there any thumb rule to use the masks?
if it is please tell me sir
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#4 Adrian Sierkowski

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Posted 12 September 2009 - 08:18 AM

Well you gotta make sure you're using the right mask for the lens you're on. They're marked in mm, for example one might be a 18-25mm mask which means on an 18-25mm lens you won't see the mask in the image area. Aside from that, no rules that I know of.
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#5 debal banerjee

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Posted 12 September 2009 - 10:50 AM

thanks a lot sir...i am extremely grateful to you
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#6 Adrian Sierkowski

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Posted 12 September 2009 - 10:58 AM

Don't mention it, I'm always happy to help. Welcome to the forums.
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