ef micro four thirds speedbooster

released today. Check metabones site. Bought mine already!

I just emailed Metabones to see if this will work with the BMCC 2.5k MFT. There's something on the product page about it being capable of external power.

Dustin, I didn't see that. In the description it mentions, powered by the camera. This is not ideal for the BMCC MFT passive mount camera since the optics are tuned for a standard MFT camera with their usual filter and acts as a 0.71x focal reducer with one stop more light. It won't focus on the BMCC as well as the Speed Booster specifically tuned for the BMCC with the 0.64x focal reducer and 1⅓ stop more light.
http://www.metabones.com/products/detai ... EF-m43-BM1

Edit: Thanks to the comments below, now I understand an electronic EF lens can be powered externally via USB but the BMCC MFT camera and EF lens won't communicate commands and status.

Rick Lang
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Although Rick is right about it not being ideal for BMCC here's info about the adaptor, passive MFT and external power.

External 5 Volt power supply (see note 6)

6. For those passive (without electronic pin or without power supply from the camcorder) MFT camcorders, this Smart Adapter can also be powered by external third-party 5 Volt MicroUSB power supply*.
* ) third-party 5 Volt MicroUSB power supply is not provided in the box. The compability of 3rd party power supply can't be guaranteed.

It does cause one to wonder if there's enough market motivation for Metabones to make a BMCC EF to MFT Speedbooster.

... It does cause one to wonder if there's enough market motivation for Metabones to make a BMCC EF to MFT Speedbooster.

Thanks for your note Craig.

The best selling camera has been the BMPCC according to Grant Petty. Since the BMCC EF camera was available before the BMCC MFT camera, it apparently has outsold the BMCC MFT camera, but I suspect the margin was closing over time. However when BMD released the BMPC4K EF camera that may have also boosted additional sales of the BMCC EF since the lenses could be used on both active mount cameras. If Metabones did release a Speed Booster EF for BMCC MFT, I think it would actually boost sales of BMCC MFT considerably.

The field of view of that combination with a 0.64x reducer is wider than the BMPC4K/URSA with a 135film normalized horizontal crop factor of 1.46x, a true Super 35 film field of view.

As an aside, that last sentence makes me think I missed my calling; I should have been a lawyer advocating truth in advertising. [WINKING FACE]

Rick Lang
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As Rick alluded to, the EF to MFT version of the Speed Booster, much like the Nikon to MFT version, will suffer from undercorrected spherical aberration when used on the BM cameras (seen as blooming) when shooting wide open with fast glass (f1.4 and faster). This is because the glass that covers the sensor in the BM cameras is thinner (2.4mm) than what is used in MFT cameras (4mm).

The BM specific Speed Boosters are designed with this in mind.

Here is a quick test I shot with the Nikon versions:

This is not really an issue if you stop the lens down to around f2-f2.8.

Interesting, I do fear this means there will not be a BMCC specific EF to MFT speedbooster. Otherwise, why not release it now?

Interesting, I do fear this means there will not be a BMCC specific EF to MFT speedbooster. Otherwise, why not release it now?

Perhaps they are still working on a way of controlling the aperture via some external controller?

Perhaps they are still working on a way of controlling the aperture via some external controller?

I believe that's what the toggle switch on the side is for. It was left non-operational on the BMPCC specific model, but I'm guessing with the external USB option on the standard EF-MFT speedbooster it functions, albeit with no readout for what F-Stop is in use (old school BMCC'ers will know what's up though!).

It'll be interesting to see if the Mosaic OLPF makes this the right speedbooster for the BMCC 2.5k MFT to EF, or whether waiting for a BM<CC specific model is better. And if that ones better, does it play well with the Mosaic etc.

Would this work fine with bmpcc controlling aperture an IS? Would this be perfect for bmcc 2.5 even though I don't care about the electronics?

Just heard back from Metabones-

"Hi D,

Yes! Need external power and we will launch a EF to BMCC version asap.

Pls wait….

Thank you!"

WOW Dustin THANKS for that info!

Yeah, I thought that was pretty cool of them to tell me to wait on ordering just the standard M43 adapter. I know a lot of folks have had communication issues with these guys but they've been nothing but responsive to me. I was asking them just last week if there were plans for a BMCC or BMPCC specific Canon FD Speedbooster and they were very quick to dash my hopes of such a device but I was really impressed with how transparent they were with their replies.

Yeah, I thought that was pretty cool of them to tell me to wait on ordering the just the standard M43 adapter. I know a lot of folks have had communication issues with these guys but they've been nothing but responsive to me. I was asking them just last week if there were plans for a BMCC or BMPCC specific Canon FD Speedbooster and they were very quick to dash my hopes of such a device but I was really impressed with how transparent they were with their replies.

Damn! Would buy.

cancelled my order in light of this new info

Just heard back from Metabones-

"Hi D,

Yes! Need external power and we will launch a EF to BMCC version asap.

Pls wait….

Thank you!"

Thanks a lot Dustin for the update, I was just thinking about ordering the G to MFT BMCC adapter but have a very nice set (from the 5d2 era) of OM and contax-zeiss glass that would be of no use with the current metabones version.

Happy to help

Just heard back from Metabones-

"Hi D,

Yes! Need external power and we will launch a EF to BMCC version asap.

Pls wait….

Thank you!"

Dustin, I posted a paraphrase of your information on the BMC user forum mentioning you as the source.

Rick Lang
Sent using Tapatalk HD

Yeah, I thought that was pretty cool of them to tell me to wait on ordering the just the standard M43 adapter. I know a lot of folks have had communication issues with these guys but they've been nothing but responsive to me. I was asking them just last week if there were plans for a BMCC or BMPCC specific Canon FD Speedbooster and they were very quick to dash my hopes of such a device but I was really impressed with how transparent they were with their replies.

Damn! Would buy.

Me too! I have several great old FD lenses... Would absolutely by a BMPCC Speedbooster for them, but I guess now I'll have to start replacing and reselling. Thanks for the info Jace.

Rick- thanks for passing it on!

Jace, Montgomery- for what it's worth, I use FD lenses with the standard MFT speedbooster on both my BMCC and BMPCC and they look outstanding. I do tend to stop down to at least F2 if not F2.8 though so YMMV.