Jump to content

Blackmagic Pocket Cinema Camera c-mount lens compatibility list


Recommended Posts

x2.6 !

interesting that changes the list of lenses that will work !



Come one guys... Don't make it harder than it is. The numbers are there. The sensor size is known (in the specsheet on the Blackmagic website), so is the crop factor! There is no doubt about it.


Of course the cropfactor is measured from fullframe camera's, because the term cropfactor comes from the photography world I suppose. We all know what the cropfactor of 2x means for MFT, or what the cropfactor of 1.6x means for our Canons (and 1.5x for Nikon dslrs).


So lets stick to the standard that a fullframe camera with a 36x24mm sized sensor has a cropfactor of 1x.

The cropfactor is determined by the diagonal of the sensor. In video mode the aspect ratio is 16:9 instead of 3:2, so the active sensor area is 36 x 20.25mm for fullframe.


The math:


Fullframe (5D Mark III): Active sensor area 36 x 20.25 mm, diagonal of 41,30mm.
Blackmagic Pocket: Active sensor area 12,48 x 7,02 mm, diagonal is 14.32 mm.


Divide 41.30 by 14.32 = 2,88. So the cropfactor (in relation to a 35mm fulframe dslr) is 2,88x. Fact.


his data is what the test is based on and I don't have any reason to believe it is incorrect. Science just prohibits from Blackmagic from changing anything to this fact. Or the Pocket must have a built in a Speed Booster... but it doesn't.


Lets just accept that the cropfactor is 2.88x, at least till someone can prove otherwise. The people mailing answers like 'we don't know the technical details yet' aren't very technical I suppose. I'm not a professor either, but this is all very basic stuff and the sensor size is in the spec sheet, so the cropfactor is know.


Sorry, It just frustrates me that people get all confused over this.. The way Blackmagic is answering to those questions doesn't help a lot either.

Link to comment
Share on other sites

Ive not ready any final spec sheets on this camera at all Im just reading whats on this forum ...

confusing when they have said  2.6 recently to someone!!  I would prefer it if it was 2.6

We have a good relationship with Blackmagic we built a cool rig for the BMCC the other month



When we spoke with them last week regarding the pocket camera they said the specs were not finalised for the pocket camera yet....

so lets wait and see......

Link to comment
Share on other sites

Nice find Andy! Shame it doesn't say if it actually covers m43. Some of the lenses have samples but it doesn't specify if it's in EXTC or not. There is a 1.9mm f/1 with some samples that just vignettes a bit, but that must be in EXTC...


There are some big wide angles though that look like they cover quite a wide image circle, like this Computar 6mm f/1.8:


Link to comment
Share on other sites

Hey guys,


I noticed in the top thread that you calculated equivalent FOV for each of those C mount lenses, but you also calculated equivalent aperture? I have never heard of this. Does aperture also change with crop factor? All my research seems to suggest otherwise.


Some more info on this would be great.

Thanks guys,


Link to comment
Share on other sites

The crop factor is not less, they're just not comparing it to full frame, they're stating the crop factor compared to super 35 or micro 4/3, depending on the situation.

My advice is don't worry about it, it's filmmaking, not maths, treat it like a super 16mm camera and you'll be fine.

Link to comment
Share on other sites

Actually it is a bit of 'math' to figure out if certain lenses will work on it. That's what the topic is about :)


No other GH-shooters with c-mount lenses here? There must be more!

I might to find some footage on Vimeo/Youtube as well that isn't shot in EXTC. We can do the same calculation, just in lower resolution though.

Link to comment
Share on other sites

Thanks Brucker. That is a great list! Everything with a 16mm image circle or larger should work on the pocket. 

I'll work on an update for the list with these results. Still would be nice to have some confirmation with images though :)

Link to comment
Share on other sites

IMHO the exact ratio of BMPCC to Full Frame is 2.88


Full Frame Active sensor area for full HD video is 36 x 20.25mm

diagonal = sqr(36)+sqr(20.25)=sqrt(1706.0625) = 41.30

BMPCC active sensor area 12,48 x 7,02 mm

diagonal = sqr(12.48) + sqr(7.02) = sqrt(205.0308) = 14.3189


41.30/14.3189 ~ 2.88


Which is the same if you simple divide the long sides - 36/12.48 ~ 2.88


Most C-Mount lenses cover 2/3'', 1/3'' and 1/2'' inch sensor sizes. Probably only 10 to 15% of all C Mount lenses cover the 1'' sensor size needed for BMPCC. So most will vignette heavily on BMPCC and among those which do cover correctly the 1'' sensor size there may be  still problems. Like:

                1. Will the lens work without modification on a C- Mount to m43 adapter. Some don't. Can't focus on infinity and need some rework.

                2. Is the image quality good enough. Most of those are surveillance camera lenses not optimized for high quality photo/video/film work. From what I've seen image quality on GH2 (tele converter mode) doesn't look good. It doesn't make sense to buy BMPCC which is supposed to give great image quality and stick a poor soft lens in front of it.


My hopes are in Metabone Speedbooster for m43. 

Link to comment
Share on other sites

You are right about the math, I fucked some things up :) changed the numbers... thanks.


The thing with the EXTC mode is that you magnify everything to a 100% view. Lens errors get more pronounced. This might be less on the Pocket. I don't want C-mount lenses as my only solution, but I love the idea of having a set of 3 very small lenses and the BMPCC in a small bag. Could carry it around everywhere :)


Even if the lens doesn't have the greatest quality, the funky bokeh and softness can be desirable sometime. Adding sharpness and correcting lens distortion/vignetting is easier in raw too.

Link to comment
Share on other sites

Carl Zeiss Tevidon 10mm f/2 should work fine.

I found a sample image on a NEX-7, calculated the BMPCC sensor area, this is the result:




Source: http://verybiglobo.blogspot.nl/2012/03/nex-7-carl-zeiss-jena-ddr-10mm-f2.html


There's a test of the CZ Tevidon 35mm f/1.9 as well, covers the whole Sony NEX-sensor:


Link to comment
Share on other sites

If it has not been mentioned, the bm pocket camera + speed booster + iscorama = widest taking lens of 25mm before vignette.  which is the same as a 35mm taking lens on aps-c or s35.


this maxiumum taking lens width changes to around 35mm for longer anamorphics like the sankor/eiki types.  


I just picked up a distagon 25mm to add to the rollei zeiss collection for this exact purpose.  

Link to comment
Share on other sites

Is it true that you will get a black circle around the image for C-mount lenses that have a focal length less than around 25mm? I was eyeing some Fujinon TV zoom lenses (such as the 10.5mm-147mm) particularly for the wider end. Would these give a full picture?

Link to comment
Share on other sites

while I can't speak from experience I don't think this is true...if a lens is designed to cover a specific senor format it doesn't matter what FL it has...unfortunatly it seems like most of the ones designed for 1"/S16 are 8mm or higher...at least that's  the widest I could find that covers 1"(I believe it was a Canon PL zoom lens...very expensive).

Is it true that you will get a black circle around the image for C-mount lenses that have a focal length less than around 25mm? I was eyeing some Fujinon TV zoom lenses (such as the 10.5mm-147mm) particularly for the wider end. Would these give a full picture?

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Similar Content

    • By Snuff
      For sale a rare 1937 Leitz Hektor Rapid 27mm f1.4 cinema lens (s/n 417161) for the Bolex H16 cinema camera. The lens covers full m43 sensor with a little vignetting and soft corners, great for cropped sensor of BMPCC, BMMCC, BMPCC4K (S16 mode). Examples of photos taken on a Lumix GX800 camera.
      The condition for its age is excellent: the case is clean with little signs of use, there are some dust and a bubble inside (this is typical of pre-war Leitz lenses), I did not notice the effect on the picture. The lens has been professionally serviced. A complete disassembly, cleaning and lubrication was carried out. The focus and aperture rings spin smoothly and effortlessly. The diaphragm is clean, 10 blades. The kit includes the original hood, front cap and c-mount adapter - m43 (MFT) with rear cap. There is focus on infinity. I will send the lens by mail worldwide.
      I shot this video with this lens Leitz Hektor Rapid 2.7cm f/1.4 on a Lumix GX800 camera: https://youtu.be/uIRKYGp6tg8

    • By Sandeepthefifth
      Hey all, I'm looking to shoot a narrative short film with controlled lighting early next year and am thinking about shooting it on my original BMPCC...
      I know, I know. No 4K, terrible low-light, and horrible battery life. But if 1080p was fine, controlled lighting throughout, and an external battery solution, is it better for me to use the original and cancel my 4K pre-order? I could use the money saved to pay for an additional cine prime/actually pay actors a decent wage...
      What would be the advantages in this case of using the 4K over the original?
    • By jorgelibra
      C100 Mark II + Extra Battery (Original) + HardCase in perfect condition
      Price: 2800 + Shipping.
      I'm based in Spain but I can ship everywhere, shipping costs are around 50-100 and it will travel in the HardCase (included in the price) so it will be just fine :)
      This is the most reliable camera that I've ever used. ND's included, natural cinematic colors, Dual Pixel, amazingly detailed 1080p from an internal 4K downsampling process (made in camera), dual slot sd card recording, etc etc, just 100 % proffesional.
      I'm selling it just because I allways work with a cameraman which is fully equiped, so I'm not using mine enought.. ¡sadly!

    • By Bozzie
      Panasonic GH2 + Flowmotion V2.02 Hack. Color Graded to taste. Download my BozGH2Pana_GT Film LUT for Panasonic GH2 Cameras HERE: https://bulentozdemirfilms.wordpress.com/downloads/bozgh2pana-gt-film-lut/
      Music: Ross Bugden - Dawn
    • By Alex T
      I'm looking to swap my Zeiss ZF.2 lenses for the equivalent Canon mountable Zeiss ZE lenses.
      Each of my lenses comes with 16:9 adaptors (which adapt the lenses to EF bodies, with de-clicked aperture and AF confirmation). 
      I have the following ZF.2 lenses: 21mm f/2.8, 35mm f/2.0, 50mm f/2.0 (Makro Planar), 100mm f/1.4 (Makro Planar).
  • Create New...