Blade Interference on Canon 90D with a Sigma ART 1.4, 35mm
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‎08-05-2021 12:07 AM
I have a 35mm Art 1.4. On my Canon Rebel T3i I get perfect pictures at 1.4, and on my Canon 90D ( also a crop sensor) I get blade interference at 1.4 - Why? What am I missing here?
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‎08-05-2021 05:29 AM
@dpisarra wrote:I have a 35mm Art 1.4. On my Canon Rebel T3i I get perfect pictures at 1.4, and on my Canon 90D ( also a crop sensor) I get blade interference at 1.4 - Why? What am I missing here?
What exactly is "blade interference"? I have never heard that term before.
Can you post sample images that demonstrate the issue?
"Enjoying photography since 1972."
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‎08-05-2021 11:03 AM
I think it's a firmware issue. Sigma has replied that they have an update to fix this known issue.
It is vignetting - oddly it shows up in the preview, but not the CR3 or DNG on Lightroom.
Thank you for participating and trying to help.
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‎08-05-2021 11:12 AM
The preview is a jpeg that is created by the camera.
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‎08-05-2021 07:16 AM
@dpisarra wrote:I have a 35mm Art 1.4. On my Canon Rebel T3i I get perfect pictures at 1.4, and on my Canon 90D ( also a crop sensor) I get blade interference at 1.4 - Why? What am I missing here?
Do you mean vignetting?
Conway, NH
1D X Mark III, M200, Many lenses, Pixma PRO-100, Pixma TR8620a, Lr Classic
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