mostman Posted December 31, 2014 Share Posted December 31, 2014 Hi, the reason I'm asking is that I bought a yongnuo smart adapter for my canon glass but it turns out it does not allow me to change the aperture when recording video, however I can change aperture just fine when shooting stills. Is this a limitation of the cheap adapter or am I not using the correct settings on the A7S. so if I invest in a metabones will it have the same issue ? Quote Link to comment Share on other sites More sharing options...
Tim Naylor Posted December 31, 2014 Share Posted December 31, 2014 I have the metabones adaptor to EF to E mount and it works fine changing aperture. Quote Link to comment Share on other sites More sharing options...
jcs Posted December 31, 2014 Share Posted December 31, 2014 The MB NEX to EF IV allows changing the aperture in video mode. Only major bug found is that when changing lenses between the 24-105 F4L and 50 1.4, the camera sometimes crashes (shows a black screen). I have to remove the battery a few times (camera on) before it starts working (I think changing lenses with power on might also work). If you need to effectively change exposure during certain shots, auto ISO works well as it's very smooth. Quote Link to comment Share on other sites More sharing options...
mostman Posted January 1, 2015 Author Share Posted January 1, 2015 Thank you for the replies, do you have any idea if it's just the mark IV that can do that, can the mark III do it as well ? Quote Link to comment Share on other sites More sharing options...
Administrators Andrew Reid Posted January 1, 2015 Administrators Share Posted January 1, 2015 Yes you can change aperture whilst recording on the Mark III and IV but you shouldn't use the III with the A7S it's not fully compatible. Quote Link to comment Share on other sites More sharing options...
noone Posted January 1, 2015 Share Posted January 1, 2015 The Metabones IV has a larger inner hole and matt coating. Glad I got it over the III because my favourite lens is a Canon 24 tilt shift lens. http://www.metabones.com/products/details/MB-EF-E-BM4 I had my first experience of it stopping work last night, just took the battery out for a second and it was fine. Quote Link to comment Share on other sites More sharing options...
Administrators Andrew Reid Posted January 1, 2015 Administrators Share Posted January 1, 2015 If it does that during an important shot, you can't just take the battery out and say "it's fine" Quote Link to comment Share on other sites More sharing options...
mostman Posted January 1, 2015 Author Share Posted January 1, 2015 Great I just picked a mark IV today for a good price, I just tried it with my lenses the aperture works perfect in video, however the auto focus on my 50mm 1.8 and the 28mm 2.8 didn't work. Would the battery removal do the trick or do I need to maybe update the firmware ? Edit: the autofocus worked on the other cheaper adapter, it's a yongnuo Brand. Quote Link to comment Share on other sites More sharing options...
bigs Posted February 11, 2015 Share Posted February 11, 2015 I am having issues using my Canon 50mm f1.2L and Canon 300mm F4L IS USM using the mark iv (0.4 firmware) on the a7s. Strangely, when using the original Speed booster with the same lens combination, it works perfectly fine. Not sure why they made the software or hardware different considering the speedbooster version just has an optical reducer. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.