FS7: Metabones' positive locking EF to E-mount Speedbooster and Smart Adapter

Definitely a good idea, although doesn't look quite as sturdy as their terrific FZ to EF mount, but then probably nowhere near as expensive.
Steve
 
A fantastic development! Now with the dual locking mounts of the FS7II and this, you can safely use proper (EF-mount) full-frame cinema glass (like the CP.2s, CN-Es, Xenons, and CZ.2s) speedboosted.

This is super cool.
 
The question is if the infinity focus works on this adapters with Cine lenses like my Canon CN-E lenses that I have! I don't know if I'm the only one here but I'm having problems with focus with these lenses and Speedbooster Ultra T! works great with my still lenses but not with my cine lenses,not if you want to focus to infinity! any one else having this problem!? I know that these lenses are not listed as supported lenses on Metabones site!
 
I met this problem (infinity focus) only with super wide lenses (on still lenses) and to resolve this problem, i have to turn the internal piece of glasse counterclockwise (-330°) of metabones speedboster ultra .
There is no problems with other lenses with this changes.
http://www.metabones.com/article/of/infinity-adjustment-speed-booster-only
My laowa 12mm FF iris@2.0 met same problem than my old tokina 11-16mm but after setup right metabones ultra everything is right.
Tell me if that resolve your problem with CP prime lenses.
 
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Ben, it is because i just buy new speedboster with a laowa12mm lense and i forgot to setup my new speedboster so during my last shooting job i did an very bad focus job.... i don't want this problem happen for other people. Even when they know this issue like me.
 
Hi rudo-fr,thank you for the advice,but I've already tried that solution but it didn't help! I can't focus to infinity the way I can with my C300Mkii with same lens! so for now i can't use the speed booster with my Canon CN-E lenses,I use the €50 Commilite instead.
Adjusting the infinity focus like that is almost impossible! i mean you have to rotate it and test and you could have rotate too much or too little and test again and rotate again and it really could take infinity to reach that focus:undecided:shocked:
 
Sorry to hear that, to me for adjusting my laowa 12mm lense take only 5 minutes. I have laser meters to do that. Effectively with standard metabones there isn't glasses Inside so there isn't this problem but you loose adventage of Full Frame and 1 diaf more.
 
Sorry for my naivety, but I have no experience with PL lens mounts. I realize that these new adapters are "EF-Mount to E-Mount" with positive lock mechanisms, but I'm assuming they act similar to a true PL mount system. So, my reading in the past has told me that PL mounts are known for being strong in order to handle heavy PL lenses. If these adapters have the same concept only for the "EF-Mount to E-Mount" system, won't that make them much stronger? I'm asking because my FS7 is fitted with an Arri FS7 baseplate that has a Metabones support screw to lock in a Metabones adapter. I do this with my current speed booster and adapter and it works well at taking away the stress from the FS7 mount and instead puts it where the lens mounts to the adapter. If these new adapters (and speed boosters) are much stronger thanks to their positive lock mechanisms, would that eliminate the need for lens support on Canon 70-200 2.8 and Canon 100-400 4.5-5.6 lenses? They each weigh around 3.5 lbs. If so, that would make lens changes faster and would clean up my 15mm rods. I'd love to be able to treat those two lenses just like I do my 16-35, 24-70 and 50mm lenses, thus eliminating the need for lens support.
 
Joshua Milligan said:
Sorry for my naivety, but I have no experience with PL lens mounts. I realize that these new adapters are "EF-Mount to E-Mount" with positive lock mechanisms, but I'm assuming they act similar to a true PL mount system. So, my reading in the past has told me that PL mounts are known for being strong in order to handle heavy PL lenses. If these adapters have the same concept only for the "EF-Mount to E-Mount" system, won't that make them much stronger? I'm asking because my FS7 is fitted with an Arri FS7 baseplate that has a Metabones support screw to lock in a Metabones adapter. I do this with my current speed booster and adapter and it works well at taking away the stress from the FS7 mount and instead puts it where the lens mounts to the adapter. If these new adapters (and speed boosters) are much stronger thanks to their positive lock mechanisms, would that eliminate the need for lens support on Canon 70-200 2.8 and Canon 100-400 4.5-5.6 lenses? They each weigh around 3.5 lbs. If so, that would make lens changes faster and would clean up my 15mm rods. I'd love to be able to treat those two lenses just like I do my 16-35, 24-70 and 50mm lenses, thus eliminating the need for lens support.
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well, the positive lock on the new adapter would help to create a stronger hold between lens and adapter. The stress on the cameras mount to the adapter would still be the same. For fs7mark 2 users, the positive lock on the camera body, and now this positive lock, should eliminate the need for lens supports for lenses like you mention above.

For us fs7mark 1 users, it means you can support the metabones adapter with support like you mentioned, leave the adapter on the camera supported, and change lenses from 24-70 to 70-200 without worry or changing anything. As long as the metabones is supported a bit, you'll be good to go.
 
videoshot said:
Hi rudo-fr,thank you for the advice,but I've already tried that solution but it didn't help! I can't focus to infinity the way I can with my C300Mkii with same lens! so for now i can't use the speed booster with my Canon CN-E lenses,I use the €50 Commilite instead.
Adjusting the infinity focus like that is almost impossible! i mean you have to rotate it and test and you could have rotate too much or too little and test again and rotate again and it really could take infinity to reach that focus:undecided:shocked:
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It's not that difficult, though you'll be surprised at how much you have to rotate it. I recently backfocused 6 different copies and it ranged from needing a 90º to 300º shift. It's not as delicate as the backfocus on, say, a B4 mount broadcast lens.
 
Yeah, I was going to second the opinion that changing the back focus on the speed booster isn't as hard as it might seem. I had to change it to reach infinity for a Tamron 35mm SP lens I purchased, but then when I mounted a 24-70mm zoom, infinity was off again.

Not having any pet sharks or fricken laser beams, I sat in the living room (with just a small lamp) when stars were visible outside, and I tweaked the SB in increments, narrowing in on a very small area. I'd say 1 to 2 degrees. If I'd had more patience I think I could have set the SB so that the 24-70mm zoom I was using would act like a parfocal lens. I got pretty close as it was, though. It can be touchy, but patience is the only thing that's taxed, it's not hard.
 
Joshua Milligan said:
that eliminate the need for lens support on Canon 70-200 2.8 and Canon 100-400 4.5-5.6 lenses?
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An Fs7 owner I know runs the Canon 70-200mm and the Canon 100-400mm without any lens support and he's never had an issue. I frequently see shooters with Fs7's out in the field with a Canon 70-200mm mounted and rarely do I see anyone using lens support.

The only issue I have heard of with a commonly used lens is the Sony 28-135mm. Someone I recently worked with said he had two of them snap in two near the lens mount. I suspect that the aforementioned Canon zooms are built more robustly than is the Sony 28-135mm.

One is always better off using lens support, of course. I am just addressing the likelihood of negative outcome as a result of not using lens support. I have seen where a Canon 24-70mm snapped in half near the mount during transport in a soft case. Likely as a result of being impacted during transport, not a result of the force of gravity on the lens.

Always best to remove any lens during transport. In the beta cam / full size camera days that was rarely done. The lenses lived on the cameras for years. There are going to be times during run & gun shooting / doc shooting where you leave the lens on the camera for speed of shooting, in order to be able to snatch & shoot so as to keep up with the action.

Even if you have no need for 15mm rods, they are good to have on the camera to protect the lens from impact. Sort of a safety cage only a 1-sided safety cage.
 
People have mentioned that it's best to support the Metabones adapter with lens support, any brands and models to suggest? The metabones adapter support doesn't work on the FS7 unfortunately due to it's body design. :(
 
JPNola said:
An Fs7 owner I know runs the Canon 70-200mm and the Canon 100-400mm without any lens support and he's never had an issue. I frequently see shooters with Fs7's out in the field with a Canon 70-200mm mounted and rarely do I see anyone using lens support.

The only issue I have heard of with a commonly used lens is the Sony 28-135mm. Someone I recently worked with said he had two of them snap in two near the lens mount. I suspect that the aforementioned Canon zooms are built more robustly than is the Sony 28-135mm.

One is always better off using lens support, of course. I am just addressing the likelihood of negative outcome as a result of not using lens support. I have seen where a Canon 24-70mm snapped in half near the mount during transport in a soft case. Likely as a result of being impacted during transport, not a result of the force of gravity on the lens.

Always best to remove any lens during transport. In the beta cam / full size camera days that was rarely done. The lenses lived on the cameras for years. There are going to be times during run & gun shooting / doc shooting where you leave the lens on the camera for speed of shooting, in order to be able to snatch & shoot so as to keep up with the action.

Even if you have no need for 15mm rods, they are good to have on the camera to protect the lens from impact. Sort of a safety cage only a 1-sided safety cage.
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Pretty much any lens I put on the MK1 camera from Otus to old Lomo to sigma 18-35 if you try to use wireless follow focus on it the lens flexes at the mount and gives you a judder to the start of your focus rack.
 
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