Boards > Questions
Ask a Question
So I'm thinking of upgrading from my mk II to an a7s -
All of my lenses are obviously EF mount.
If I switched over and used an EF - E mount adaptor, is there any drawbacks? Does it hinder quality at all? Or will it not make a difference?
If it's just an adapter and NOT a SpeedBooster, the optically it's doing nothing to the image at all.
If you do opt for a SpeedBooster adapter ( to use with the A7S in APS-C crop mode ) then you might actually see some improvement to the image your Canon lens creates. Most high quality SpeedBooster adapters ( like the Metabones adapters ) tend to improve the sharpness and flatness of the image your lens produces. The only drawbacks I've experienced ( using Nikon lenses ) is sometimes a little bit of extra flare from the lens + SpeedBooster combo, but it's really not that noticeable.
FYI: The talented Dave Dugdale did two YouTube reviews on non-SpeedBooster adapters to mount Canon lenses on the Sony A7S camera, so you might want to take a peak at these.
Metabones vs Commlite Canon Lens to Sony Body Adapterhttps://www.youtube.com/watch?v=TTPM5U6fBDM
Commlite vs Fotodiox Canon to Sony Adapterhttps://www.youtube.com/watch?v=dFt9va_oRMU
July 20, 2015 at 5:06PM
David, I got Metabones EF-E IV when I was switching from Canon to A7s so I could keep my EF L glass. About a month later I tried manual Rokinon lenses and could tell no difference between Canon 35mm L and Rokinon 35mm Cine DS, as well as between Canon 85mm L mk2 and Rokinon 85mm Cine DS. Actually 35mm L has an out of control chroma compared with Rokinon's version.
I've seen all kinds of condescending comments about Rokinons but after I compared their DS Cine versions against Canon's L glass I personally could not tell a difference.
So, my recommendation would be to sell your EF glass and to go with Rokinons -- at least this transition worked out for me. The adapters are a waste of money.
If you are interested here are jpegs I took with Rokinon/A7s and with Canon/Metabones/A7s combo:
Again, personally I cant tell the difference.
July 23, 2015 at 3:43PM