Bigger lens = more Light?

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Pooperpotamus New Member • Posts: 8
Bigger lens = more Light?
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Okay, so i understand apature to some degree but a thought accrued to me. Is I.e f1.8 always the same in terms of letting light in?

example:

These two lenses both have an apature of f1.8 but the Samyang (first one) is consideredly bigger, does this mean that the Samyang let’s more light in at f1.8 than the canon 50mm at same F stop?

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