Focal Reducer Comparison on the BMPCC

Focal Reducer comparison on the Pocket Cinema Camera

Info - Focal Reducer comparison
on the Pocket Cinema Camera
Details

Recently I took a gamble and bought a 0.72x focal reducer from an eBay store called Roxsen. It's the RJ Focal Reducer. Unlike the Mitakon Lens Turbo, this one fits without any trouble at all. Last weekend I got around to giving it a field-test whilst shooting a video for a client - an exclusive car rental agency here in the Netherlands. 

For those interested: the topic of the shoot was a half-million-euros Lamborghini Aventador.

It was all shot using the Blackmagic Design Pocket Cinema Camera. Using the following lenses: 

  • Sigma AF 24-70mm f/2.8 IF EX DG HSM - Canon EF mount
  • Panagor 135mm f/2.8 MC - M42 mount vintage lens
  • Samyang 14mm T*3.1 ED AS IF UMC VDSLR - Nikon mount

Comparison shot sets were shot from a locked down tripod, of course. The intermissions were shot using a Kessler Crane with a Kessler Revolution head, controlled via Oracle Controller with the help of Site Steendam and Thom van Seijen.

The entire video was shot in CinemaDNG RAW, and graded using Adobe Camera RAW. All DNG's have received the exact same treatment as far as colour temperature, sharpness and colour settings go. Exposure was adjusted to match each other, since otherwise the shots with focal reducer would be way too light (since it's adding an extra stop of light).

You can watch the video below, as well as a couple of comparison images from the video. If there are questions - please feel free to ask them.

Below I've embedded two image sets from the video. It gives a clear and obvious difference between the field of view with and without the focal reducer.

Sigma 24-70mm without Focal Reducer on the BMPCC

Sigma 24-70mm with Focal Reducer on the BMPCC

 

Panagor 135mm without Focal Reducer on the BMPCC

Panagor 135mm with Focal Reducer on the BMPCC

If you found this interesting, you might also want to take a look at these posts

Comments

Others have left 22 comments so far. Tap/click a comment to reply to that comment.

Matt
Shots look awesome! How do you like the Speedbooster from Roxen? I'm guessing you can't control aperture with it correct?
Ruben Kremer
Website for Ruben Kremer
The adapter is very nicely made. It could've been a little tighter fit on the EF side though. Aperture control is non-existant (of course), but that's also why I mostly advocate the use of manual lenses - like the Samyang's for example.
Matt
Thank you for replying!
Johan
Incredible footage!
Ruben Kremer
Website for Ruben Kremer
Thank you! I'll pass the words to the rest of the team as well ;-)
Caleb Ward
Website for Caleb Ward
Awesome comparison. What camera rig were you using?
Ruben
Website for Ruben
The basic rig was a tripod with, well, not much of a rig - just the BMPCC mounted to the tripod. For the crane shots we used a 12-foot Kessler Crane with a Kessler Revolution head with Oracle Controller. Magic combination ;-)
Hector
Is this it?
http://www.ebay.com/itm/Focal-Reducer-Speed-Booster-Adapter-Nikon-F-mount-G-lens-to-Micro-4-3-GX7-E-PL6-/400655817523?pt=US_Lens_Adapters_Mounts_Tubes&hash=item5d48f29b33

I can't seem to find anything that says RJ
Ruben Kremer
Website for Ruben Kremer
That's the Nikon F/G to M4/3 version. I've got the EF to M4/3 version in my kit. Just click the Roxsen link in the first paragraph, and select the EOS EF version. :-)
hector
Got mine today.
Fit perfectly-- and works like a charm so far.
I have to admit- it's the first time I really liked what I saw coming out of my BMPCC-- coming from an 1.5x this 2.88x messed with my head and sense of proportion---
And sorry cats and kittens, the C-mount lenses- are only good if you have the really expensive ones-- the cheap ones-- well.. -- too much trouble for what ends up looking like a novelty image.
Ruben
Website for Ruben
I agree - I'm not too much into C-mount lenses. Maybe the new Kish Optics for the Digital Bolex will proof to be good. But with a fixed aperture of f/4 and at around $340 each, they better be good as far as optics go. Time will tell I suppose, Joe said he'll prepare some demo footage when he gets back from NAB.
Dom Fernandez
hi, nice look and work. thanks for share. Have you ever tried Metabones or Mitakon for MFT with BMPCC or another MFT mount?
I'm in a trouble, i have GH2 and BMPCC, without nikon lenses, i only have minolta md mount lenses, but i don't know if metabones for MFT or BMPCC is 300 euros better than cheap speed boosters.
Ruben
Website for Ruben
I haven't used any other focal reducers yet. But I'd try the Mitakon/Zhongyi focal reducer (first) if I were you. The Metabones might be optically superior, but I personally always have a hard time throwing lots of money to adapting not-so-expensive stuff ... I think the Mitakon will work fine.
Alphonso
Website for Alphonso
Hi Ruben!

Nice job, great blog! So I am looking for an alternative on the metabones too, pricewise ;) So stumbled upon your blog. Does the given specs of lenses mean you put the FR on BMPCC first, than lets say an EF to Nikon adapter for your Samyang glass and than the lens itself? And doesn't that affect te outcoming image in a bad way?

Thanks in advance.

Groeten uit Arnhem
Ruben Kremer
Website for Ruben Kremer
Hey Alphonso,

You're 100% correct. I used a Nikon > EF adapter to mount the lens to the EF > Micro 4/3 focal reducer. It works just fine, no issues - just make sure to get a good adapter, because you want a 'tight fit'. Since you'll be adding 'two' adapters in practice, you want them to be tight fits so to have as little play as possible :-)

~Ruben
Alphonso
Website for Alphonso
Thanks Ruben! All clear :) And thanks again for this cheap but great alternative! Greets
Brandon
Any noticeable softness or image quality loss when using the adapter? Hard to tell from the stills but over all looks solid.
Ruben
Website for Ruben
I haven't noticed any major softness when using this focal reducer. However - considering the crop factor/sensor size of the BMPCC, it might be softer on the edges when mounting it to a real M43 sized sensor. I don't have a MFT camera lying around to test this.
Nicke
Website for Nicke
Thanks for the review! I bought one (Nikon to M43) after reading your review. I have not used the Metabones Speed Booster but I think this one will be more than enough for my use. If you are interested you can take a look at my test with and without the focal reducer. I only used a test chart so no fancy videos as yours :) https://www.youtube.com/watch?v=scowmtIgtPQ&feature=youtu.be
cedric
Website for cedric
Hello ! Thank you for this great "test". It helped me a lot. I have hust one question. Can you tell me what is the "exact"name for the EF to Nikon adapter please ? I would buy it but....
Sorry for my bad english and the question, I'm a beginner...
Thank you.
Dave
Website for Dave
Hi Ruben - awesome looking video. I am wondering it is possible to use a speed booster AS WELL AS a HolyManta VND EF? I'm guessing not but would very much welcome a knowing response. Best, Arner.
Ton
Awesome video Ruben. I'm the one who just got BMPCC a week ago and now facing trouble of choosing adapter that would reduce the focal lenght and fit with the Nikon G lenses. Right now I'm considering this one and the Metabones speedbooster which are very different in retail price. So which one worth to spend money on? Any comments of comparison between these two adapter?

Leave a comment

Name, e-mail and an actual comment are required. Website is optional. Your e-mail address will never be published.

You are replying to a comment by [name]