• speed booster eos to nex adapter:

    These are pretty interesting:


    yes there are lots of other adapter out there and at $600 these are quite expensive, but here's why: They offer a .76 FL conversion as well as adding a stop of light. .76 combines with the 1.5 factor of the nex to get you 1.1 effective focal length conversion factors!!! I'm wondering if these #s will work on APS-C lenses for MFT when that adapter is out, but either way this is pretty rad for NEX people as a 2.8 zoom becomes an f/2 zoom and maintains almost the same focal length as the lens is on my FF DSLR...

    more here: http://www.dpreview.com/news/2013/01...irless-cameras
    Comments 27 Comments
    1. jacobsen1's Avatar
      and in their white papers: http://www.metabones.com/images/meta...te%20Paper.pdf
      it does indeed say DX lenses will cover MFT via that adapter (when available) but not APS-C. That's pretty rad. Now if only they'd make this modular so you buy the optics once and then could switch off the front or rear end. I've love EF to BOTH MFT and NEX (and maybe eventually X) and I also have olympus and nikon old school manual lenses as well...
    1. danm's Avatar
      This seems like a really rad adapter. i wish it were less costly, cause I'm a cheap ass. But I has certainly peaked my interest.
    1. Andy's Avatar
      Perhaps time for a merge?
    1. jacobsen1's Avatar
      can't merge a forum post/thread with one that starts with a front page article, sorry Andy! You did win though time wise!!!

      question, how does this control the apertures of the EOS lenses? I see contacts, but where's the power come from? I don't care about AF, especially not with the NEX (and assuming they add peaking to the "XE1s" and "X pro 1 S" there as well. But this just made the NEX and possibly a fuji with lenses FAR more interesting to me because for $500 I don't need lenses immediately... It would have been much better for me (but not their bottom line) if the mount end at least were interchangeable and I'm sure some people would say the lens end. But either way I really want to play with one of these on my NEX to see how well it could landscape with my 16-35II and filters.
    1. jacobsen1's Avatar
      and one thing I just realized, I have adapters for nikon and olympus to EOS. So if I got the EOS to NEX adapter I'd have 3 in one personally. I'd then also eventually love a EOS to fuji option to play there. Of course this does NOT get around the size issue as the 16-35mm isn't small, but using it on a NEX5 makes for a lot lighter package than the 5Diii and it takes a lot less space. The fact they give you an arca foot is nice too for keeping it on a tripod.
    1. Andy's Avatar
      The more I think about this thing the more this blows up the concept of full frame sensors for me. Basically I see full frame as having two advantages: low noise especially at high iso and shallow depth of field.

      The Fuji sensor has taken care of that first one for me (and so did the NEX-5N I had) but the second was always something that I thought would never really be fixed as that is just physics and markets. Shallow DOF requires glass and nobody seems willing to come up with a f/1.0 lens specifically for an APS-C so you can have an equivalent of a f/1.4 on 35mm.

      This adapter pretty much gives me that depth of field while giving me an actually extra stop of light to drop my ISO with. This is huge.
    1. ppower's Avatar
      This is really interesting to me. I have at times wondered about the possibility of this as it is basically the opposite of a teleconverter. It is essentially a magnifying glass to focus the rear element down to just enough to cover an APS-C sensor. This is why it also increases the lens sharpness as well. Win win win. Now what if NIkon/Canon/Sigma/Tamron would make adapters that would play friendly with autofocus even if for the DSLRs? It could spell the end of a need for ff sensors but still have use for FF lenses.
    1. ppower's Avatar
      One question though. Why would they make an adapter for Alpa of all things? I thought it read Alpha at first. Ignorant me had never even heard of Alpa.
    1. jacobsen1's Avatar
      alpa must mean alpha which is sony's mount and the adapter shown, so I'm guessing type-o? And Andy, exactly, this takes FF and really takes away most reasons for it at this point. Sony's always made the best sensors. Yeah, FF can have more resolution but the APS-C sensors out now have enough. For landscaping, I'd have to sit down and think about how diffraction plays into this, but I'm thinking the up and down scaling of the aperture would mean you're fine there too right? But yeah, the fact you now have 2.8 lenses that act like f/2 in terms of light gathering and give you the same DOF you have on FF is just amazing. The ONLY drawback now is physical size but you're still cutting back on the size of the body so it's a partial win there. This really helps simplify things. And because sony has peaking that's awesome too (as will fuji soon enough).
    1. ppower's Avatar
      That's what one would expect, but they also make a regular Alpa adapter as well. Odd. http://www.metabones.com/product/sony-nex
    1. ride5000's Avatar
      well, one question is whether or not the difference between full frame and aps-c or m43 dof is 1 stop. i haven't done the math.
    1. Andy's Avatar
      Quote Originally Posted by jacobsen1 View Post
      alpa must mean alpha which is sony's mount and the adapter shown, so I'm guessing type-o?
      I don't think it is a typo. I think these are actually Alpa lenses. Which is cool and all but really damn odd.

    1. Andy's Avatar
      Quote Originally Posted by ride5000 View Post
      well, one question is whether or not the difference between full frame and aps-c or m43 dof is 1 stop. i haven't done the math.
      Yeah, each is a step apart. I always cheat and use Cambridge's calculators on their web site.
    1. danm's Avatar
      example of the speed booster in action

      http://www.canonwatch.com/more-about...is-the-ff-cam/
    1. ride5000's Avatar
      Quote Originally Posted by Andy View Post
      Yeah, each is a step apart. I always cheat and use Cambridge's calculators on their web site.
      interesting. it looks like apsc vs 35mm is a little bit more than 1 stop.

      m43 vs 35mm is two stops (makes sense as it is a 2x crop factor).
    1. jacobsen1's Avatar
      Quote Originally Posted by ride5000 View Post
      well, one question is whether or not the difference between full frame and aps-c or m43 dof is 1 stop. i haven't done the math.
      I was shocked to learn this during one of my reviews. The 20mm 1.7 on MFT vs the 23mm f2 on the aps-c x100 have almost identical DOF by the numbers. Image wise its close too with the bigger difference being the focal length difference.
    1. ppower's Avatar
      I keep thinking about the possibilities with this. An adapter would be great, but what if it was even added as the rear element? You could take existing lens designs and quickly have lenses for crop. A 70-200 f/4 becomes a 50-135 2.8 to get the benefit of lighter/smaller, or a 50 1.4 becomes a 35 f/1 to maintain FF attributes.

      If nothing else, this is good for wrapping my head of what it takes to "equal" FF performance: +1 aperture, -1 ISO, and +50% mm for APS-C or +2 f-stops, -2 ISO, x2mm for MFT. Heck, I think much could be simplified by just referring to everything in 35mm equivelant, but an MFT zoom of 28-84mm f/7-f/11.3 isn't as impressive as 14-42mm f/3.5-5.6. OTOH, fudging the display of ISO by 2 stops on MFT changes 200-25,600 to 800-102,000. Suddenly it seems that FF's real benefit is extending to LOW ISO for shallow dof in daylight and the fact that there are even lenses bright enough to exploit the ability. Convoluted? Maybe, but just chew on it for a minute.
    1. Andy's Avatar
      Here is a really good review of this from a NEX7 to Canon. Looks really good.
    1. ppower's Avatar
      It's video, but here's the Sony FS100 crop sensor video camera vs. 5Diii.
    1. jacobsen1's Avatar
      Nice review.
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