Yeah...if you were well aware of "how it all works" You wouldn't have the questions you're asking...you would know that a m4/3 to m4/3 speedbooster is impractical/impossible for more than one reason.
I'm well aware of different lenses and mounts and how it all works
??...apparently not ! Even 3rd party lenses that would offer a sufficiently large image circle with m43 mounts , like the rokinson's for instance would not be able to be speedboostered because using the m43 mount version makes these lenses from the lens element to the flange longer allowing no space for a speedbooster. For example, look at the specs for the robikon 14mm ef and m43 versions. The ef version is 3.8 " long while the m43 is 4.76" . That length difference is where the speedbooster would fit. So if you want to use a speedbooster , it's got to have sufficient space between the lens elements and the flange.
Of course not. If you concentrated the light and FOV of a M4/3 lens it would have to go and reduce and concentrate it onto something with a smaller sensor again, like 16mm. That's how lens boosters work. So yes, do read up a little on how lenses and boosters work.
You can, at the risk of wobbliness and IQ as mentioned in earlier threads, get, say adapters to M42 mount: Nikon>M42, Canon>M42, etc etc. See those threads about stacking adapters.
Thanks for the reply Vitaliy, and thanks for the link. But that's not really what I asked, I'm well aware of different lenses and mounts and how it all works. My question is simply: Is there a lens turbo that still gives me a M43 mount to mount my other adapters for such as Nikon to M43. As far as I can see, there is not lens turbo or speed booster that offers that.
Study this thing - http://www.personal-view.com/faqs/camera-usage/lenses-mounts-faq
As well as use some google to understand few things about lenses and mounts.
Could anyone please help me out with understanding one thing...
I have a GH3, and would like to put on the lens turbo. Problem is that I have lenses with M4/3 mount, Nikon mount, and Konica. For these lenses I use different adapters to adapt them to my GH3 mount. Now, if I put on the lens turbo, can I get it with M43 mount so that all my adapters for my different lenses still work? As far as I can see the lens turbo has mounts for Nikon, Canon, and some other but not with a M43 mount.
I could imagine how awesome my Voigtlander 25 0.95 would be with the speedbooster!
RJ has sent the attached diagram which shows how to adjust the infinity focus. I would suggest you mark the current position before changing it. I have only one EOS lens right now so before changing it, I need to try other lenses to see how it performs.
Huh, if you turn the optical block position of infinity point slightly changes.
@ICProductions said (March 9)
Ok - I saw a post saying adjusting the back focus/optical block is possible, but no actual directions on how to do it.
ditto
However, any idea if the lens turbo might change the focus point? For example, in order to focus on infinity I need to dial back to 10m mark.
Check earlier posts in this topic. Adapter allow to tune slightly optic block so it'll be all good.
Comparing Helios 58mm F2 with Simple M42 to M43 Adapter vs. Cheap M42 to Nikon Adapter with Lens + Nikon to M43 RJ Lens Turbo.
Images are 100 % Crops from 4k @ F2 and ISO 200
it isn't able to focus infinity, just for macro shooting
From adapter description. Please carefully check the table I linked.
@Vitaly_Kiselev Great, that's a big help! So I would have no problems to use my M42 lenses on the RJ Lens Turbo Nikon>MFT(bmpcc) with such a simple adapter?
@CameraRick Thank you for the information!
I have read about problems about the Metabones speed booster Nikon->MFT/BMpcc and M42 due to the depth of M42 adapters. It could scratch the optics - do you have ever experienced this?
What kind if problems have you had with using the EF version?
Minolta MD is not properly adaptable to either M42, Nikon or Canon EF (only with Glas-Adapters that will ruin your image, and add some crop)
If you use Nikon/M42 usually, I'd stick with that route. You can adapt both to EF, but while M42 adapts nicely you can get wiggle-issues with Nikon, a lot. If not in the beginning, shortly after. More elegant. The Canon EF isn't worth it anyway, if you ask me. Dump it for a cheap Nikon 50mm f/1.8 or equivalent for the M42 mount, and have same quality at better handling (including aperture control that you won't have with any of these adapters) I bought the EF one so I can use "anything", but this was only a temporary solution. I actually wanted to get a better NIK-EF Adapter, but as the best ones (Novoflex) cost actually more than a second booster, I asked myself if it were that wise... :)
From my experience, the Sankor isn't fun in any combination, but I wish you good luck with that :)
I am currently stuck a bit deciding which RJ version to buy for my Blackmagic Pocket (bmpcc) so very sorry for this "complex" post.
My lenses are...
M42: Helios 44-2, Mir-1, Pentax Super Takumar 28/3.5 Nikon: NIKKOR C auto 43-86/3.5 (on its postal way) EF: Canon EF 50mm f1.8 II - not woth selling ;-) Anamorphic: Sankor 16c
The choices are:
My budget does not allow to get all combinations ;-)
Thank you a lot for helping my head thinking this over!
Back on-topic with the RJ's aperture control...
I can confirm @Shaveblog 's description of the aperture ring being able to perform click-less f-stop pulls while shooting video. However, since my only Nikon-mount lens for my Nikon RJ speed boost adapter is already a cine Samyang 25mm 1.5, I don't need another clickless aperture.
Still, it's intriguing how the aperture behaves on the adapter. As Shaveblog says, I need to have the lens's own aperture closed-up for the RJ's aperture to work. I'm wondering if shooting like that is using a different part of the lens? Is it doing anything at all to the image, say different shaped bokeh?
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