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"Its" is the posesive pronoun (plus finding enough to meet the minimum)
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edit approved Jul 3, 2015 at 0:17
JDługosz
edit approved Jul 3, 2015 at 0:17
JDługosz
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Basically there is a manual iris that is designed to produce as round an opening as possible in order to render out of focus highlights as circles (instead of pentagons, or octagons, etc.)

Since the whole purpose of this lens is to produce smoother blurred backgrounds using the apodizaion elementapodization element, it would be a waste if the effect were ruined by not having a circular aperture when stopping down slightly.

Presumably having this aperture stop right down would compromise it'sits roundness, so they added a second aperture which can close all the way down for when you want a very narrow aperture.

Basically there is a manual iris that is designed to produce as round an opening as possible in order to render out of focus highlights as circles (instead of pentagons, or octagons etc.)

Since the whole purpose of this lens is to produce smoother blurred backgrounds using the apodizaion element, it would be a waste if the effect were ruined by not having a circular aperture when stopping down slightly.

Presumably having this aperture stop right down would compromise it's roundness, so they added a second aperture which can close all the way down for when you want a very narrow aperture.

Basically there is a manual iris that is designed to produce as round an opening as possible in order to render out of focus highlights as circles (instead of pentagons, octagons, etc.)

Since the whole purpose of this lens is to produce smoother blurred backgrounds using the apodization element, it would be a waste if the effect were ruined by not having a circular aperture when stopping down slightly.

Presumably having this aperture stop right down would compromise its roundness, so they added a second aperture which can close all the way down for when you want a very narrow aperture.

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Matt Grum
Matt Grum
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Basically there is a manual iris that is designed to produce as round an opening as possible in order to render out of focus highlights as circles (instead of pentagons, or octagons etc.)

Since the whole purpose of this lens is to produce smoother blurred backgrounds using the apodizaion element, it would be a waste if the effect were ruined by not having a circular aperture when stopping down slightly.

Presumably having this aperture stop right down would compromise it's roundness, so they added a second aperture which can close all the way down for when you want a very narrow aperture.