B4 Lens Test Results: With optical correcting adapter // Super 16, Super 35, E mount, M4/3, Canon RF

[@OlimpiuVuia]

Hey, great content! I'm looking forward to see your developments. What adapter would you recommend for fx30?

[@jamesandcamera]

Thanks for finding it useful 😊 For an FX30 either the IBE HDx35 adapter if you have a few $k or the one I put together and use in the corrected footage in these tests, which is more affordable. If you had heaps of budget to Sony LA-EB1 may also work, but is technically only listed as working with the FS7. I may be biased to the one I put together and sell but I think it does just as well in terms of image quality at a fraction of the cost.

[@OlimpiuVuia]

@@jamesandcamera Can you provide a link to purchase the adapter?

[@jamesandcamera]

@@OlimpiuVuia the IBE and Sony ones are easy enough to google. Otherwise email me for the one I put together and I can send you price and pics of the latest batch

[@RafaelangeloDeNazareth]

amazing video! I have an arri alexa xt with ef mount an dpl mount and i want to adapt a b4 angenieux zoom to it... where can i find the recommended adapters you mentioned in the video>?

[@jamesandcamera]

Hey Rafael, B4-PL mount adapters are your only option with the XT. I don't make ones in PL unfortunately, so not really any affordable options. The only options in PL I recommend for quality optical correction are the IBE and the Arri one. Hope that helps 😊🤙

[@seanbonbon]

Thank you so much for this video. It gives me hope that I can find a semi-affordable setup to actually make B4 lenses look good on cameras with larger sensors. So much of the test footage on KZbin is without optically correcting adapters and it made me sad when I saw it. 😂

[@jamesandcamera]

Yeah, same. There is also a lot of mis-information out there. Which is why I made these videos and put together a more affordable corrected adapter for people like myself who can't afford $3000-9000 for a corrective adapter.

[@seanbonbon]

@@jamesandcamera Do you sell these adapters or can you point me in the right direction to find/make one? Or are there any that are commercially available that you recommend that aren't ridiculously expensive?

[@jamesandcamera]

@@seanbonbon kzbin.info/www/bejne/mKmxYYeKZbxqbpo this is an overview of the one I put together and sell. It's the only affordable optically corrected adapter. Every other adapter that has the same image quality is more expensive by several $k

[@davidbajer2389]

Hi James, thank you for your channel. I use a Sony FS7-M2 but would love to get back to my Canon HD HJ22eX7.7IRSE lens. I am currently using the Sony LA-EB1 B4 adapter, but the image isn't as sharp as the examples you have shown. I would love to connect and talk about your adapter.

[@jamesandcamera]

Hey David, my email is in the about section of this channel. I would be very interested to see the image quality you are getting with the LA-EB1, I assumed it would have been better than this adapter being 8x the price.

[@jasonlumetta]

Do you have a recommendation for the Blackmagic Micro Studio 4K G2? I'm looking for a longer zoom type, in low light, for wildlife. Thank you for your suggestions.

[@jamesandcamera]

Not sure for the 4K G2, it is a little trickier as it has a MFT sensor rather than the S16 in the older models. For lens, a Canon J21x7.8 would work well on a budget paired with a corrective adapters. If you have higher budget and can live with a heavy lens, there is currently a Canon J33x15 floating around on eBay for sale for a great price. It's heavy, but has an insane zoom ratio. Again optical corrector recommended. Otherwise HJ17x7.6 and HJ22x lenses are much more expencive but higher quality over all. Again optical corrector required for best results. Any B4 lens uncorrected will be soft due to uncorrected RGB offset causing spherical aberations.

[@jasonlumetta]

@@jamesandcamera I would love to try them out, just nervous to spend the $$ and then not work.

[@jamesandcamera]

@@jasonlumetta Its definitely a risk. If you want more Black Magic Micro specific experience using B4 lensing Cole at Alt-Cine has been doing a few videos on it recently. He might be better to give you first hand experience using B4 with a Micro.

[@stephan_manterola]

Hi James, I have a J15x9.5B II 9.5-143mm and I want to use it on a Blackmagic 6K EF, what adapter do you recommend to mount it. Thanks

[@jamesandcamera]

Hey Stephan, I am not aware of any EF adapters that work with S35 unfortunately. The only EF optical B4 adapter I know of is for S16 sensor and specifically for the C300mk2. Sorry EF is just not as suitable compared to mirrorless mounts or full depth PL

[@sodefi]

Это гениально, как вы догадались скрестить blackmagic Ursa mini b4 mount and Sony e-mount m39

[@jamesandcamera]

I had been researching how to do it for a long time 😊🤙

[@DamijinMyndz]

You keep mentioning an optical correcting adapter. Do you have a link to it?

[@jamesandcamera]

I mention more details here; kzbin.info/www/bejne/mKmxYYeKZbxqbposi=zhrQzUxYvc6ASHqF

[@NVCinematography]

hello greet video, can you help me find adapter B4 to RF full frame camera thanks and best regards

[@jamesandcamera]

No adapter exists for full frame cameras, as it would make the exposure quite dark with the approx 4.5x image expansion/teleconverter required. Sorry, it is better to just use an actual FF zoom instead in your case.

[@FrontRowScreens]

Hey James, needing to do some long range super-slow shooting and we are considering using an FS700 (with burst slomo) paired with a SD 55x box lens. Could you suggest an adaptor for this? (2/3" B4 -> E Mount).

[@jamesandcamera]

Hi, definitely look at IBE B4-PL adapters then use a PL-E adapter. Or MTF do a B4-E but I have not tried MTF personally. Otherwise I convert the optical corrected B4-E adapter you see used for the corrected footage in this video series. Email me if you are interested 😊👍

[@science830]

whats the canon cine version? you kept dancing around the model number but never said it. searching "canon 21x cine" doesn't get me much clarity.

[@jamesandcamera]

Sorry mate, I assumed people would look at my other videos and find the full test I did with it, showing the full lens name. Go here for the video on it 😊🤙 if you get one, make sure you have a really rigid lens support system. kzbin.info/www/bejne/jWawqJaIfsSnm8U

[@jamesandcamera]

There is also this older video I made showing lens model and test footage with it too 👍 kzbin.info/www/bejne/fZPCmHp5lsaEb5Y

[@assNaut]

is it possible to find out which technology you use, which lenses, to eliminate aberrations, I disassembled and redesigned b4 for a full frame and I think I would have coped with the task, the main thing is to know what to do) if you don't want the whole world to know about it, I can write to the mail

[@jamesandcamera]

It's not something I can share sorry. But the information is widely available that I used. With some research you could easily find it yourself. I wouldn't recommend expandinding to FF sensor coverage, it is not worth the light loss and becomes far more optically complex. The lenses base T-stop becomes a T11-T16 wide open because of all the light loss from expansion, which is not very useful. Aim for S16 or S35 coverage instead for better results.

[@ssalceda5]

Which adaptors would you recommend?

[@jamesandcamera]

Depends on what camera you want to adapt to. What mount is it that you want to adapt to?

[@realisthw]

​@@jamesandcamera Fuji/Panasonic (MFT/FF)

[@jamesandcamera]

@@realisthw the adapter I used in these tests is one I convert. I can make it in Sony E, Canon RF, Micro 4/3 and Fuji-X. Suitable for S35 with doubler and S16 scan mode without doubler. Otherwise IBE makes great A+ adapters and MTF make good adapters.

[@realisthw]

@@jamesandcamera What adapter are you using? (model and manufacturer please) As I understand you B4-EF adapter, and then you convert EF-other mount?

[@jamesandcamera]

@@realisthw I make/convert the optically correcting adapter I used in these tests. It corrects for the light wavelength offsets that are designed for 3CCD sensors with prisms. Heaps better image quality than a basic passthrough adapter, or adapter with just an expansion element.

[@s87343jim]

Noob question: What does optical correcting adapter correct? I mean the conventional wisdom is that the less glass in between, the sharper it will get, especially the only thing we are trying to do, its to maintain the flange distance?

[@jamesandcamera]

Great question, watch the first 1min of this other video I made, which talks about why with images. Basically the lenses are designed for 3CCD sensors which have very different requirements. kzbin.info/www/bejne/mKmxYYeKZbxqbpo

[@kennyadvocat]

Wish Fujinon made a lense for native M43.

[@jamesandcamera]

It would make things so much easier than using complex adapters 🎥

[@getfmlr]

They do..but it's not a b4 lens. It's the Fujinon MK series 18 55 and 50 135 t2.9 zoom lenses. While they don't have the same reach they are parfocal,modern optics and fully geared.

[@kennyadvocat]

@@getfmlr odd those have m43 mount but S35 optics.

[@getfmlr]

@@kennyadvocat indeed the mft mount came later...originally they made the lens for fuji x mount and sony e mount. After many years on the market they introduced mft and canon rf mount.

[@Emiliano-Oseguera]

Nice! I use my sony a6400 with a dummy adapter and it doesn't look bad at all! Either way i shoot from 5.6 and above to avoid bad looking images

[@jamesandcamera]

Yeah, the doubler clears up some haze. But you still end up with a much lower level of sharpness in the wider end of the iris range. If it works for you that way that is great, the more use of B4 lenses the better in my opinion. They are a great tool 😊🤙

[@Emiliano-Oseguera]

@@jamesandcamera completely agree! I have the Fujinon 22x HD and it's been wonderful being able to go from 22 mm to 450mm I do sports cinematography so it fits perfectly for my work

[@jamesandcamera]

@@Emiliano-Oseguera Ah man if you have a HD lens I would definitely recommend some sort of optical correcting adapter when you have the budget. It is worth doing with HD lenses as currently you are really only getting the quality of an SD lens and leaving a lot of sharpness untapped. Still fully understand if it's good enough for now. Sometimes that is all you need 😊👌

[@Emiliano-Oseguera]

@@jamesandcamera yeah! Unfortunately optical adapters are ridiculously expensive, for now I'll keep my dummy adapter, either way the quality is pretty decent ! Let me show you an example

[@Emiliano-Oseguera]

@@jamesandcamera kzbin.info/www/bejne/n6fMmWqug7mjbJYsi=DsmP9RIWRlqNHRD1

[@brettalexander.studio]

Pardon My ignorance but I am looking to purchase my first b4 broadcast lens for my Ursa broadcast G2. Looking for kind of the best all around with most zoom range and best image quality for around a thousand bucks or under. If using it on the first of broadcast G2 which adapters do you suggest for that system?

[@jamesandcamera]

For lens, it depends on the deals you can get. Any 16x or higher magnification lens would be best, as long as it has a doubler. Canon J16x8, Canon J21x7.8 are both good SD lenses. Otherwise a HJ17x7.6 is worth the extra investment if you can save for longer to have a higher budget for a HD lens. As far as adapter the Ursa Broadcast cams should have an optical corrector mount built in. If it doesn't and it is a normal Ursa mini, then you will need to determine which of the B4 mounts suits your cameras model code. It is listed where the mounts are sold.