GB Sports Photographer & The Panasonic LUMIX S1

Dark circle around corner using sigma 85mm 1.4 nonart


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Using Sigma 85mm F1.4 EX DG HSM with canon 80d,
Dark circle around corners if i shoot at 1.4 above 1.6 no circle in image but shows in live view.
No lens hood or filter used.
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Tianshi_angie 4 2.6k England
22 Mar 2019 9:46AM
Try making your aperture smaller and your shutter speed slower - if necessary put the camera on a tripod to keep it still.
Dave_Canon 13 1.6k United Kingdom
22 Mar 2019 11:54AM
Have you any filters on this lens?
saltireblue Plus
9 9.8k 36 Norway
22 Mar 2019 12:10PM

Quote:Have you any filters on this lens?

From the opening post:Smile

Quote:No lens hood or filter used.
Philh04 Plus
14 2.1k United Kingdom
22 Mar 2019 12:48PM

Quote:Try making your aperture smaller and your shutter speed slower - if necessary put the camera on a tripod to keep it still.

Negates the reason for using a wide aperture lens...

Most wide aperture lenses will vignette slightly when used wide open or near to wide open however the transition is gradual, the sharp outline to the vignette here seems to indicate that something is amiss, can you try the lens on a different body?

If the problem remains then the lens may need to serviced...
smacau1 7 527 United Kingdom
22 Mar 2019 12:58PM
Have you got in camera lens correction set to on?

It might be trying to apply a Canon lens profile to your Sigma lens.
banehawi Plus
15 2.1k 4036 Canada
22 Mar 2019 4:58PM
Sigma DG lenses are meant for full frame cameras, their DC models are made specifically for APSC cameras, like the 80D. This may be the issue.
LenShepherd 11 4.0k United Kingdom
23 Mar 2019 8:30AM
I am reasonably confident there are no f1.4 "crop sensor" lenses. When a crop sensor lens is used on a 24x36 body the corners gradually go to black, so it is not that.

I have never seen an effect like the one posted with s distinct sharp edged outer dark circle.

Try the lens on another body, maybe by visiting a camera shop.
Chris_L 5 5.2k United Kingdom
23 Mar 2019 8:56AM
That lens vignettes quite a bit, compare the diagram between f1.4 and f2.0. I think the rectangle is the APS-C area. Have a look here .

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You should definitely turn off any in-camera corrections and effects, the result you are getting isn't like vignetting, it's more like some kind of effect.





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