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Lens starburst at fully open aperture

Started Feb 17, 2022 | Discussions thread
Atis photo
OP Atis photo Junior Member • Posts: 36
Re: Lens starburst at fully open aperture

Sittatunga wrote:

I don't have that RF zoom, but other constant aperture zooms I do have achieve their constant aperture by stopping down the iris towards the wider end of the zoom.

WOW, that's a new one for me! That might be the issue! So in reality, at wider end of the zoom, the lens might be brighter than f4, say f3? And it is stopped down to f4 just so that it matches fixed aperture of f4?

 Atis photo's gear list:Atis photo's gear list
Canon EOS R Canon RF 24-105mm F4L IS USM
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