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Commlite Canon to Sony on A6300 A7Rii A7Sii

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Hopefully this will be helpful for some of you who are planning to get the Commlite Canon to Sony AF adapter for the new bodies with Phase Detection.


Me and my buddies were just curious about how well some of the Canon L Prime (plus the newer 40mm STM) will perform with the adapter, and we video captured the output and slapped them into a video.

Not exactly a scientific comparison but does give an idea.


Canon EF 200mm f2.8 L ii
Canon EF 135mm f2 L
Canon EF 100 f2.8 macro L IS
Canon EF 85mm f1.2 L ii
Canon EF 40mm f2.8 STM 
Canon EF 24mm f1.4 L ii


One thing I noticed is that the newer design lenses (2009 and later) seems to perform better on camera with phase detect, whereas the older ones perform better on contrast detect.




Here is a quick one of just A6300 with just 85L ii, 40STM, 24L ii 





Thanks for checking it y'all  :)




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  • 1 month later...

the 16-35mm f/4 L IS USM is very fast, IS works nicely but the focus is very inaccurate with the commlite on my a6300.




The attached photo (100% crop) shows how the autofocus is slightly off, this issue occurs on every focal length with my 16-35L IS.

The 2nd, properly sharp photo is manually focused.

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Apparently it's a lack of teamwork between the lens

and the way the camera's AF sees the lens via the



I'd guesstimate that your lens overshoots the mark,

and that it always did, even on the Canon. Most AF

lenses have a hint of mechanical slop. Perhaps on  

the Canon you had microadjusted the AF ... which

would compensate for slop only if the lens always

did its final focus motion [or its ONLY focus motion

if it were that decisive] always in the same direction.


AF Microadjust is really for slight discrepancies in

mirror and/or AF sensing cell alignment is SLRs but

if the above scenario were in play, with the error in

always the same direction, microadjust would also

fix that situation as well. 


Tiny amounts of mechanical slop have increasing

effect as FL decreases, and you are using a zoom

that goes from a mildly short to a verrrry short FL :-(


Or maybe the Canon also did tiny last millisecond 

tweaks, sort of double-check and fix it, to it's initial

AF result, but the 6300 does not, or at least when

it's working with the Commlite it does not.  


Either of the above would/should be solvable thru

firmware ... if they get around to it. BTW have you 

compared contrast detection to phase detection ? 

The shortcomings and strengths of each method

are the exact reverse of the other method. Maybe

one is workable and the other is inappropriate for

your combination of hardware ?

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Thanks for the detailed reply. Infact I havent noticed anything "Off" on 5DII or 5DIII and neither

of them are microadjusted however as you said it might just be the adapter or a6300.


On contrast AF I get 0 focus-confirmation which is why I never tried using it.

Will do under good light conditions in the next days and see if it gets any better.

With the Metabones Speedbooster I have not had the Issue though, AF was fast and accurate.

Meanwhile I am rather happy with the AF accuracy of a VERY old Sigma 24mm f/2.8 Macro.

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