Not sure what to do with Brutus

1 year 1 month ago #749327 by Esseff
Brutus is my Sigma 150-600mm Contemporary. Thing is, when I bought it I was still using my Canon 90D which has an EF-S mount. Brutus has an EF mount which I believe to be Canon's full frame mount. So the Sigma is made for a full frame camera.

Some months back I switched to a Sony mirrorless and wanted to continue using Brutus. I bought the Sigma MC-11 adaptor that bridges the EF mount on the lens to the the FE mount on the Sony. This adds extra length between the lens and I have played around with various settings to try and determine what effect (if any) the adaptor has on picture quality/resolution. Long story short: I'm not seeing anything (other than the smaller resolution and zooming in when shooting in APS-C mode) that would be considered a loss in quality. However someone recently said I should have the lens converted to an FE mount so I can leave out the adaptor but never said why. Can anyone fill in the blank? Apart from shortening it by an about an inch is there any other benefit to do the conversion?

TIA


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1 year 1 month ago #749335 by TCav
Sigma will change the mount on one of their lenses if you change camera brands, but that for when you're changing from a Canon dSLR to a Nikon dSLR, where Sigma makes the same lens for both camera brands. Sigma doesn't make the 150-600 for the Sony FE mount, so I don't think they can change the mount for you on that particular lens.


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1 year 1 month ago - 1 year 1 month ago #749336 by Esseff

TCav wrote: Sigma will change the mount on one of their lenses if you change camera brands, but that for when you're changing from a Canon dSLR to a Nikon dSLR, where Sigma makes the same lens for both camera brands.

I just found that this is exactly the case. One lens with different mounts. The EF mount on the lens is for Canon's full frame DSLRs, the adaptor merely steps it down to Sony FE. Slightly narrower field of view but I'm still getting full resolution so no harm no foul.

TCav wrote: Sigma doesn't make the 150-600 for the Sony FE mount


Actually they do. See HERE .

Thanks for the reply!! :thumbsup:


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1 year 1 month ago #749337 by TCav

Esseff wrote:

TCav wrote: Sigma doesn't make the 150-600 for the Sony FE mount


Actually they do. See HERE .


I stand corrected.

But I don't think its the same lens as yours.


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