Why are there dark corners when using Sigma 85mm F1.4 EX DG HSM with Canon 80D?Why are my new Canon 80D RAW files are unreadable on my computer and on Photoshop CS5?Why am I getting ERR 1 on my 80D when I shoot with a small aperture?

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Why are there dark corners when using Sigma 85mm F1.4 EX DG HSM with Canon 80D?


Why are my new Canon 80D RAW files are unreadable on my computer and on Photoshop CS5?Why am I getting ERR 1 on my 80D when I shoot with a small aperture?













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When using a Sigma 85mm F1.4 EX DG HSM with Canon 80D, a bright circle with dark corners appears in images shot at F1.4. Above F1.6, it doesn't appear in image, but does show in live view. No hood or filters are used. Issues are with this lens only. Other lenses work fine.



image 1image 2










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    2















    When using a Sigma 85mm F1.4 EX DG HSM with Canon 80D, a bright circle with dark corners appears in images shot at F1.4. Above F1.6, it doesn't appear in image, but does show in live view. No hood or filters are used. Issues are with this lens only. Other lenses work fine.



    image 1image 2










    share|improve this question









    New contributor




    Ajit S is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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      2












      2








      2


      1






      When using a Sigma 85mm F1.4 EX DG HSM with Canon 80D, a bright circle with dark corners appears in images shot at F1.4. Above F1.6, it doesn't appear in image, but does show in live view. No hood or filters are used. Issues are with this lens only. Other lenses work fine.



      image 1image 2










      share|improve this question









      New contributor




      Ajit S is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.












      When using a Sigma 85mm F1.4 EX DG HSM with Canon 80D, a bright circle with dark corners appears in images shot at F1.4. Above F1.6, it doesn't appear in image, but does show in live view. No hood or filters are used. Issues are with this lens only. Other lenses work fine.



      image 1image 2







      canon-80d






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      New contributor




      Ajit S is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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      share|improve this question









      New contributor




      Ajit S is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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      share|improve this question




      share|improve this question








      edited 1 hour ago









      xiota

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      11.3k41862






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      asked yesterday









      Ajit SAjit S

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      133




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      New contributor





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          2 Answers
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          4














          Turn off lens correction. It's a known issue with this and several other Sigma lenses on newer Canon bodies.






          share|improve this answer






























            5














            This is a known problem with some 3rd party lenses. All you need to do is go to the Lens Abberation Correction Menu and turn off Peripheral Illumination Correction.



            This happens because Sigma copies the lens code from another Canon lens. The camera body sees this lens code, applies the correction it thinks it should be, and you get weird patterns.



            How to Fix Weird Visual Behaviour With Your Third Party Lenses






            share|improve this answer























            • Thanks mike sowsun and michael c, after disabling it is working fine. Thank you very much

              – Ajit S
              yesterday










            Your Answer








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            2 Answers
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            2 Answers
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            active

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            active

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            active

            oldest

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            4














            Turn off lens correction. It's a known issue with this and several other Sigma lenses on newer Canon bodies.






            share|improve this answer



























              4














              Turn off lens correction. It's a known issue with this and several other Sigma lenses on newer Canon bodies.






              share|improve this answer

























                4












                4








                4







                Turn off lens correction. It's a known issue with this and several other Sigma lenses on newer Canon bodies.






                share|improve this answer













                Turn off lens correction. It's a known issue with this and several other Sigma lenses on newer Canon bodies.







                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered yesterday









                Michael CMichael C

                133k7152378




                133k7152378























                    5














                    This is a known problem with some 3rd party lenses. All you need to do is go to the Lens Abberation Correction Menu and turn off Peripheral Illumination Correction.



                    This happens because Sigma copies the lens code from another Canon lens. The camera body sees this lens code, applies the correction it thinks it should be, and you get weird patterns.



                    How to Fix Weird Visual Behaviour With Your Third Party Lenses






                    share|improve this answer























                    • Thanks mike sowsun and michael c, after disabling it is working fine. Thank you very much

                      – Ajit S
                      yesterday















                    5














                    This is a known problem with some 3rd party lenses. All you need to do is go to the Lens Abberation Correction Menu and turn off Peripheral Illumination Correction.



                    This happens because Sigma copies the lens code from another Canon lens. The camera body sees this lens code, applies the correction it thinks it should be, and you get weird patterns.



                    How to Fix Weird Visual Behaviour With Your Third Party Lenses






                    share|improve this answer























                    • Thanks mike sowsun and michael c, after disabling it is working fine. Thank you very much

                      – Ajit S
                      yesterday













                    5












                    5








                    5







                    This is a known problem with some 3rd party lenses. All you need to do is go to the Lens Abberation Correction Menu and turn off Peripheral Illumination Correction.



                    This happens because Sigma copies the lens code from another Canon lens. The camera body sees this lens code, applies the correction it thinks it should be, and you get weird patterns.



                    How to Fix Weird Visual Behaviour With Your Third Party Lenses






                    share|improve this answer













                    This is a known problem with some 3rd party lenses. All you need to do is go to the Lens Abberation Correction Menu and turn off Peripheral Illumination Correction.



                    This happens because Sigma copies the lens code from another Canon lens. The camera body sees this lens code, applies the correction it thinks it should be, and you get weird patterns.



                    How to Fix Weird Visual Behaviour With Your Third Party Lenses







                    share|improve this answer












                    share|improve this answer



                    share|improve this answer










                    answered yesterday









                    Mike SowsunMike Sowsun

                    8,0261925




                    8,0261925












                    • Thanks mike sowsun and michael c, after disabling it is working fine. Thank you very much

                      – Ajit S
                      yesterday

















                    • Thanks mike sowsun and michael c, after disabling it is working fine. Thank you very much

                      – Ajit S
                      yesterday
















                    Thanks mike sowsun and michael c, after disabling it is working fine. Thank you very much

                    – Ajit S
                    yesterday





                    Thanks mike sowsun and michael c, after disabling it is working fine. Thank you very much

                    – Ajit S
                    yesterday










                    Ajit S is a new contributor. Be nice, and check out our Code of Conduct.









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                    Ajit S is a new contributor. Be nice, and check out our Code of Conduct.












                    Ajit S is a new contributor. Be nice, and check out our Code of Conduct.











                    Ajit S is a new contributor. Be nice, and check out our Code of Conduct.














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