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    Metabones question
    #1
    Senior Member scorsesefan's Avatar
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    Picking up an fs5 and a used Metabones ef-e mount adapter (non-speed booster). Is there a significant difference between the III and IV version? My Canon glass is 24-105 v1, Canon 17-55 2.8 and Canon 55-250 stm. Thanks


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    #2
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    I believe them to be very similar, Speed Boosters that is, in optical performance bar the following. The internal anti-reflective coatings are supposed have been improved on the IV. I've never used a III version but some users complained about flare when a light source was at the edge of the the image. I believe on th IV the rear opening of the adapter was enlarged to eliminate vignetting issues with certain lenses such as tilt shift lenses. I use a Speed Booster Ultra IV on an FS7 and have been more than satisfied with it performance.

    Chris Young


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    #3
    Senior Member scorsesefan's Avatar
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    Thanks, my main concern is vignetting on my EF-S lenses. I don't use trick lenses so I was hoping I could save a few bucks with VIII...


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    #4
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    I believe version three has to be sent to the factory for firmware updates, while version four can be updated by the user.


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    #5
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    Quote Originally Posted by Ericjurg View Post
    I believe version three has to be sent to the factory for firmware updates, while version four can be updated by the user.
    Interesting! I did not know that little gem.

    Chris Young


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    #6
    Senior Member scorsesefan's Avatar
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    Thanks. Is there a significant difference between the T version and non-T?


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    #7
    Senior Member Bern Caughey's Avatar
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    I believe the ‘T’ versions have flocking applied to their interiors.


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    #8
    Senior Member scorsesefan's Avatar
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    Quote Originally Posted by Bern Caughey View Post
    I believe the ‘T’ versions have flocking applied to their interiors.
    Thanks.


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