Searching for a lens

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Sacha_lens New Member • Posts: 1
Searching for a lens

Hi to all,
I am new to photography. I need to buy a lens with the following specifications:
When 2 m away, I need a radius of 2 m with a 45 degree angle left and right from the line of sight (the center point). Thus, height is 2 m, radius is 2 m, and the hypothenuse is 2.83 m. The lens will be used under dark conditions with red light, which may influence how much light can be let through.  Any suggestions would be appreciated.
Thank you in advance,
Sacha

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