How Does a Speedbooster Work ? ( and Metabones vs Viltrox )

[@antonybui855]

Your production value alone is worthy of a million subs.

[@ViniciusAmano]

I was just about to comment about this. FREAKING AMAZING VIDEO QUALITY! DAMM!

[@pcofranc]

He know how to edit video & effects!

[@JonathanDavisKookaburra]

wardrobe not included*

[@CryptoProphet]

Totally agreed.

[@penumbra547]

your channel is going to blow up soon with this level of content, keep up the good work!

[@art_means_artificial]

yeye of crouse! last video was Published on 11 Jun 2019

[@Orca774]

Sadly not with this upload schedule

[@HollywoodweddingfilmsGREECE]

This video contains INCREDIBLE amount of ACCURATE information and amazing way to express it with visuals !!!!!!! Cannot truly say enough to be fair on the AMAZING EFFORT !!!! Congradulations !!!!!!!! One question , please : Can i use the Sigma 18-35/F1.8 with the XL0.64 Speedbooster , if i decide to use ONLY the 24mm-35mm Focal Length ??!!

[@zebrazone]

Thank you ! I really care about the 9 minutes you spent watching the video, as much as you cared to watch it. Interesting, I'll test that when I have an XL in my hands and let you know. It should actually be OK because I've already used a (Full Frame) 5D Mark II with the 18-35 set at 35mm, vignetting was only very strong at 18. Let me check that once I have an XL to try !

[@HollywoodweddingfilmsGREECE]

@@zebrazone I really appreciate your response and your interest. Your behaviour is exceptional. You stand out among KZbinRS , like a sunshine into the darkness. BRAVO,BRAVO,BRAVO !!!!!

[@hatakekakashi938]

When I use the sigma 18-35 on my GH5 with the Xl 0.64 Speedbooster it works the hole focal length as long as I'm filming. But with photos it starts to crop at around 23 when I'm in 4:3 mode. Don't know if its the same with the Blackmagic Pocket 4K? But they should have about the same size on the sensor. And with that camera you won't be taking any photos I'm guessing. @@HollywoodweddingfilmsGREECE

[@HollywoodweddingfilmsGREECE]

@@hatakekakashi938 Thank you for your input. Unfortunately Pocket 4K has a sensor 10% bigger/wider than GH5. Pocket 4K = 18.96mm GH5 = 17.30mm As a result , it creates significantly more vignetting in the XL speedbooster. But i am not sure which focal lengths are affected by this , on the Sigma 18-35.

[@NilsnLewinski]

@@HollywoodweddingfilmsGREECE I rented BMPCC 4K last week, it came with Metabones Speedbooster EF/BMCC. When I've tried it with Sigma 18-35 and few Xeen Cine lenses I've noticed some aberrations and vignetting in the corners. I switched Metabones for my EF/M43 XL (x0,64) and image was crystal clear.

[@AdamFunk]

This is the third video I've seen by you, and you're quickly becoming my favorite channel...in the world, on any topic. The production value and accuracy and visuals are just absolutely insanely well-done. Thank you so much for what you do.

[@migalo100]

Yes this, and "Media Devision" is beyond epic !

[@christophershivers6257]

a lot of people dont want the sharpest lens, so the viltrox would be perfect. Anamorphic lens do the same thing, and I love aberrations. It adds so much more to the camera, instead of an old boring sharp lens lol.

[@ViniciusAmano]

dude, your content is as sharp as the corners of the images on the metabones. congrats! hope u get million subs soon! u totally deserve it.

[@SakuSuzuran]

Your videos are absolutely amazing. Thank you for this comparaison. 👋🏼

[@philipquaglino]

Unless you are making money with your cameras, Viltrox ALL THE WAY. There is absolutely going to be better footage with a $700 adapter vs a $70 adapter. Metabones overcharges to much and if they were in the $300 max range its still overpriced but I would have considered it. I have a Viltrox myself and work has metabones, yes Mete is nicer but for personal use, the price cannot be beat. I expect 10 times better performance for that price and it was better but not at that price. But again, Metabones is meant for those doing this for a living so they will charge high prices, I do like de-clicked on Metabones where Viltrox is clicked. Viltrox is all manual, a BMPCC will not use the cameras functions for Iris. Metabones is like Autodesk, they charge so much because pros use it and can afford it, but their is the cheap version with far less for non-pros.

[@charlesoxley7242]

I have an active Canon EF lens with a Viltrox speedbooster. I can definitely confirm that the Viltrox will most definitely allow for electronic control of the iris, autofocus, and will allow lens stabilization to work.

[@chiku40]

Thank you. This is exactly the video I’ve been looking for. The quality of this channel is amazing. You’ll have 100k subs by the end of the year.

[@zebrazone]

Glad you enjoy Clayton ! Thank you for your support, which means a lot.

[@leslawkaznowski]

it is really a difference in sharpness, but with viltrox the problem is that you have to "tune" it correctly. This glass can be moved closer or further to the sensor. That solves also a lack of sharpness in the infinity problem. Great content! cheers!

[@RudyAyoub]

Need me a sailor shirt dose for the day ;)

[@matesaktesak]

I thought he was wearing a calibration chart 😁

[@flyguy8787]

I type in BMPCC 4K and of course it’s a dude wearing a sailor shirt with fog in the air for no reason...I expected nothing different. 😂

[@comradekirilov3483]

You and media division are the Kings of European high quality KZbin cinema nerds

[@Iflexis]

the magnifying glass-explanation was a perfect explanation for this, thank you

[@DanielRodriguez-gm1ih]

I have never heard of you or seen any of your videos but the quality of this videos it’s amazing!

[@zebrazone]

Thanks a lot Daniel !

[@autonomous9031]

I have 2 GH5 and 2 GH5s for my production house, 2 paired up with metabones and two paired up to vitrox. We’ve used them all interchangeably and randomly amongst all 4 cameras. Other the then the perceived quality difference being higher on the metabones there is no difference in the footage. None. On the viltrox you are required to adjust the lens manually to set infinity focus (you can do a quick search on KZbin for a tutorial on how to do it) it’s really simple though. Cheers

[@zebrazone]

Yep I did this infinity focus adjustement. In practice I think my usecase was very specific. Differences appear wide open only. Or maybe I got a wrong unit. Glad it's going well with you !

[@MakersLog]

Great video, I've most definitely noticed the edge blurring from my viltrox at 18mm when getting wide shots with a deep DOF. I always wondered if it was the adapter or the lens, now I know. Thank you!

[@matthewbrown6537]

The production value of this video is STUNNING! This is the first video I’ve seen from you and I’m extremely impressed. Lots of good unbiased information and no time wasted. The graphics were very professional as well. I’m definitely subscribing!

[@zebrazone]

Thank you so much Matthew ! Means a lot.

[@mikechan31]

This is the most informative and valuable source regarding Speedbooster that I’ve ever seen so far. Thumbs up for the detailed explanation.

[@cowboygareth]

hands down the very best video on this topic across the entire youtube. superb production value and presentation. I hope you have a video like this on every gear topic. would literally save me hundreds of hours of research.

[@BK42Cycles]

Excellent explanation and a very interesting test. Thanks ;)

[@MichaelNguyenn]

This by far the most detailed comparison of the speed booster I've seen yet and probably ever will. I actually have viltrox adapter on my Gh4 with sigma 18-35 and for the most part I think the image quality is sharp for enough. It's very good to know the differences between the two. I might get a speed booster by metabones once I get enough money from the Gh4. Despite the shortcomings the viltrox is just an incredible adapter to get started with for the price.

[@zebrazone]

Thanks Michael ! I agree. Honestly, I don't think it's worth upgrading if you don't feel limited. Save money for other more important stuff :)

[@panzobonito]

The best video related to speedbooster a had watch on KZbin. Congrats.

[@jordanfish]

Thanks for really doing the work to compare these two adaptors. Great production quality on these videos too.

[@rmatiasbravo]

DUDE!!! JUST THANKS MAN!! i was thinking about this, about there was another type of adaptor with better glass, saw about metabones and all of the sudden, all this type of question, came to youtube and you gave me all the answer! thx man!! cheers!

[@5757jonb]

Thank you. One of the best and most well done videos I have seen for a long time. I really appreciated the depth of understanding I gained on a topic and your use of visual aids and graphics. That is all very relevant for me right now as I'm about to buy the BMPCC 4k camera and continue my journey of discovery in this fascinating field.

[@rinusworldzm]

Bro your videos are always awesome. Entertaining and informative. I never thought I'd get to use a Metabones Speedbooster but I got a kit that came with it. I can't wait to see what it does.

[@johnromero5161]

You have the BEST production value for these videos! Thanks for making!

[@zebrazone]

Thank you John !

[@MichaelJohnsenOslo]

Seriously, this is turning into my favourite youtube channel. I am consistently impressed by the amount of work you put in your videos, and love the fact that the BMPCC4K is featured a lot, since I've recently ordered mine. Great job!

[@zebrazone]

Thanks a lot Michael ! I really appreciate your kind words, because yes : it is a lot of hard work ! Hope you can go out and shoot with it soon !

[@MichaelJohnsenOslo]

@@zebrazone Yes, believe me I know 😊 I feel it should be emphasised at times when it's bleedin obvious. Again, top notch work. And best of all, very trustworthy, which should be your first goal!

[@clifftotten7609]

BEST video on this subject that you can find. Bravo! GR8 job!

[@zebrazone]

Thank you so much Cliff !

[@thomasmills3850]

As always, great and unbiased work here and backed-up with solid visuals. We always look forward to your videos when we're getting new gear. Keep up the great work.

[@colourandsound]

I don't even need a speed booster and I still watched it all. Great video!

[@jonathanmasters2178]

Notifications are definitely on for this channel. I aspire that as I start my KZbin channel I can attain somewhere near the level of quality and attention to detail you put into every one of your videos so far. Keep up the great work, cheers.

[@JohnHarvey]

Really great comparison here. I had both the metabones and the viltrox speedbooster and never noticed I difference in sharpness in the center or edges but your test do show quite a bit of difference in the far corners. Great review

[@zebrazone]

Maybe it's because I was wide open actually.. thanks !

[@JohnHarvey]

@@zebrazone no I think you're review was accurate and very well put together I just think that I was not pixel peeping or really looking at the details in the corners. The metabones is definitely the superior speedbooster. For most people it's just about whether or not the Price Is Right.

[@zebrazone]

@@JohnHarvey Oh I see ! Well Metabones should definitely be 200$ cheaper to be really worth it I think.

[@gregoryv3621]

Your videos are insanly great and this one doesn't make a change ! 😍 The image, the editing, the sound, the music, the informations and the clarity of it makes it so good! You're clearly a step upper than all the other tech reviewers.. Bravo! 👏

[@aristomenis_k]

It's really amazing how this channel keeps exceeding prevention, amazing work thank you for this amazing content and visuals!

[@brentthomasaustin]

Done. Subscribed. Saw your video yesterday and thought, okay... this is good. Was searching today for the viltrox vs metabones and I find you again with an incredibly specific problem I've been searching for online. Amazing work!

[@khurrammughal8999]

a great comprehensive video, no more confusion about metabones to BMPCC 4K

[@oskarlinnemann8934]

Love the video! but lets say you only have a BMPCC 4K and no lenses or speedbooster yet. Would you buy the 0,64. and just start buying full-frame-lenses or would you buy the 0,71. and buy APS-C Crop lenses? What is your thoughts? Plz help

[@richardpcrowe]

I don't have a Metabones Speed Booster to test against my Viltrox EF-Eii Speed Booster. However, I am fairly happy with my Viltrox, using it with Canon EF lenses modified for use on the Sony APSC A6400 and A6500 cameras... I use this almost exclusively for portraits so the unsharp edges do not bother me to any great degree and, perhaps because I am only using the center portion of the frame, I don't notice the unsharp edges too much. I also have an inexpensive M42 to E-mount speed booster which I also use primarily for portrait work. I was able to get the Viltrox EF-Eii Speed Booster for right about $100 (U.S. Dollars) on-line. Since I primarily use native e-mount lenses, except for portraits, the Viltrox provides an economical accessory for my e-mount APSC cameras. I have noticed that my EF 70-200mm f/4L IS and 100-400mm f/4.5-5.6L IS ii lenses auto focus better with the Viltrox than with the Metabones IV and Sigma MC-11 adapters...

[@nordfresse]

Other comparisons show that the corner sharpness on the viltrox improves significantly once you stop down to 2 or 2.8. Also, the Sigma 18-35 is an apsc lens, so it may be better with full frame lenses. I personally think that it is better to use a full frame stabilized lens like the canon 24-70 f4 on the BMPCC4k/Viltrox setup.

[@alexanderchua]

You, my friend, actually made everything very easy to understand! You are also very accurate! Kudos and more power!

[@zebrazone]

Thank you so much Alexander !

[@ShotbyPicto]

Quite possibly the best tech review video on KZbin, and most definitely as it relates to focal reducers. This the best video in this category, by far. Thank you for this content.

[@davidesimonazzi1640]

This video is sooooo well made. Keep going, love❤️

[@kalkimovie]

Great as always! Receiving my pocket 4K this weekend so I needed this info, thank you so much!

[@kalkimovie]

Hi excuse me which recording media solution would you recommend if I want to shoot 4k Prores Hq or so (Not raw) ... thank you :)

[@kalkimovie]

Mostly at 24fps and 60fps :)

[@gregoryv3621]

When did you order it? I'm still waiting for mine! 😅

[@kalkimovie]

@@gregoryv3621 October 3, from B&H. I was told January 30, but they surprised me!

[@gregoryv3621]

@@kalkimovie Wow ! What a surprise !

[@Zolacolor]

Tés vidéos sont d'une qualité incomparable ! La musique dans la première, la lumière/fumée dans celle-ci, wow... Continue!

[@zebrazone]

Merci !!

[@brandonmurray3629]

Superb content as always! Really nice comparison video. Can't wait to see more from you guys

[@PixelBokeh]

Another great video with quality analysis, engaging footage, and some very nice animations. Thanks again for a great video!

[@JsGarage]

Great information and production quality. Your channel is sure to blow up.

[@zebrazone]

Thank you :)

[@NoirEtBlancVie]

Once again, this channels is fucking AMAZING!!! Great job guys, keep it up, so much useful information, you totally bring a whole new level of clarity and production value to KZbin!

[@4ezlicense621]

Wow, thank you very well done and easy to understand. Thank you for taking the time to post this.

[@dandrescher4098]

Did I see smoke behind you ? ! Good lord this was a great, informative video!

[@raksh9]

That was smoke. These guys are on fire!

[@davidpm41]

Hi Zebra Zone,I got a question with the speedbooaster because i got mix reviews but i trust your opinion. When you put any ff lens with the speedbooster and your f stop goes from 2.8 to 1.8. This is f1.8 full frame? Or 1.8 m4/3. If it is m4/3 then you go from a f2.8 full frame to a f3.6 ff. If you are concentrate the light in one point it should be brighter, It could be test out with the adapter with no speedbooster and the with the speedbooster and crop the image to see it. Hope you could help! i am thinking on buying the 24-70 f2.8 Sigma and sell my 12-35 lumix. Great video i was going for the viltrox but i think is best to invest on the metabones.

[@jasonlok4059]

This is by far the best content i've seen! You deserve a much larger audience!

[@zebrazone]

Thank you Jason !!

[@Rnkwrk]

Thanks for this nice produced explanation! Very helpful informations and perfectly visually expressed! Super inspiring!

[@Pixelvore1]

Wow, you belong on a TV show weekly presentation. Great job. Do more please. Sailor shirt is what probably made it that good. :)

[@yangxu2496]

I don’t know how I got you in my recommendation, but I am so glad youtube did it.

[@zebrazone]

Happy accident !Thank you so much !

[@billpolitis2831]

In 6:16 there is 2 comparison shots both at f1,8. I notice that the Viltrox shot has bigger spot light bokeh!!! That means that the viltrox is more brighter or you used more speed aperture like 1,4 or 1,2 with the Sigma 12-35 (nevertheless the exposure seems to be very close). Any thought @Zebra Zone? Great video, lovely colours and FX

[@simonstucki]

very nice video, I remember when the metabones speedbooster was announced many photographers were very confused as to how it was possible for an extra lens to increase the aperture since all they new was teleconverters... some even downright refused to accept it. but actually those closeup lenses for macro stuff do the same thing, except with those you obviously loose the ability to focus on infinity... anyway, thanks for explaining it so well, I hope no everybody has understood how it works...

[@TC-rv6sz]

Hi! Quick question: can I put an additional adapter on top of the speedbooster or does that mess with the flange distance or something? I have a collection of adapters for my MFT body and am curious if I need a seperate speedbooster for each mount to lens combo.

[@filmmakerpaul662]

I learnt a lot watching this insightful video. Very well put together with a lovely aesthetic . Thanks for spending the time making this.

[@zebrazone]

Thank you very much !

[@smoogles.5534]

you're the best at this you explain it at a level where someone who doesn't know ANYTHING about cameras can understand, thank you!

[@NorVack]

Great content! I know your Chanel will blow up soon! You got this!

[@ilyatitov8514]

Your channel is very interesting and useful! I rarely subscribe to channels, but I subscribe to yours after the first video. The video was shot and edited at a very high level. Your videos are very informative! Please continue. PS: noticed an mistake at 00:07:08 - mixed height and width of the full-frame matrix) but it is not essential

[@mmadmic]

Excellent video. I think the problem with Viltox or Chinese boosters is the quality control, the majority are very good, some are correct and a few are just crappy. I agree with you about image quality, but if you plan to use pro lenses, not sure a cheap booster (or even an expensive one) is an option but when working with old lenses such as Russian M42 or T2, the ultimate sharpest is not the aim of the booster, it's more bokeh (especially in MFT) and in this specific case, even the low cost ones do perfectly the job. Personally, I still work with 120mm and 35mm film cameras and of course use the lenses on my mirrorless cameras, because I love the render of those old lenses, color, bokeh, imperfections, flare and the manual focusing ... in one word, the character . I prefer not to use adapted AF lenses because often, there are AF (speed or accuracy) and back/front-focus issues. When I need to have sharp, perfectly controlled images, I prefer to use "native" premium or pro lens, ideally fixed focal. I use zooms only when I travel. About the lens attachment, with Viltrox adapters (not only boosters), on MFT you need to make a little bit deeper the hole connecting to the camera (on the MFT rear mount) to be sure it locks properly. I had this issue on Olympus OMD-1 (both mark II and III) and on OMD-5 mark III but not on OMD-5 (mark I and II), probably Olympus changed a little bit its connector to reduce use of third-parties adapters and/or to improve something but to be sure the connection works, the small hole must be drilled +-0.5mm. It has no impact on mount to older Olympus or Panasonic cameras. I had the same issue with some other adapters I bought or I printed.

[@FrenchBassiste]

Tu dis que le speedbooster augment le contraste de l'image mais en meme temps, sans speedbooster, on prend juste le centre de l'optique qui est censé etre de meilleur qualité. L'un dans l'autre, est ce qu'on s'y retrouve pas sur la qualité ? De plus avec un speedbooster, on rajoute une lentille, qui peut amener des abérations ou autre puisqu'elle n'a pas été construit avec l'optique. Qu'en penses tu ? merci

[@0800filmez]

Hello! So T2.8 will become T2.0 with the Ultra? And if I wanted to shoot a scene at T2.8 I would have to set my aperture to T.3.2 to have the same look and bokeh as T2.8 would provide? Thanks

[@libraproducciones]

Amazing video, congrats!

[@godskingdomwork]

Metabones vs Viltrox comparison starts @ 4:00. Sharpness comparison @ 5:17 (p.s. incredible work on this video)

[@HotarusLens]

Very nice comparison. Thank you!

[@ThomazMartinez]

What are you using to make all the effects After Effects? or Resolve? or something else?

[@buildingsheriff]

I had a Viltrox that had lots of play. I exchanged it and the new copy was MUCH better.

[@eszesfilms1651]

you are the best content creator in this theme. Your style is very fresh and new. I feel you know something what i need to know :D Thanks informations!

[@Rosenbis]

Hi sir ! Did you checked the difference in sharpness in the corners when you stop it down a bit ? (Two stops)

[@dosomethingintrersting3697]

REALLY GOOD VIDEO.SUBSCRIBED SINCE THE FIRST VIDEO RELEASE.

[@gizgad567]

Just felt like I took a whole semester of school in under 9 mins. Thanks :]

[@danielfulop]

I'm not sure if I understand it well... so a Canon EF DSLR 24-70 F2.8 + speedbooster would act like a 24-70 F2.0 on my APSC Fujifilm XE4 withot the 1.5 crop factor? Or is it gonna be a 36-105 F2.0?

[@jimkoral3824]

GREAT video with actual examples that answer all questions one may have. Liked and subscribed!

[@zebrazone]

Thank you !

[@NathanCruzel]

Super nice, i didn't spotted the differences between these two speedbosters, thanks to you !

[@ajrc1987]

Nice video, Do you notice any softness at wide open when using the Metabones and the 18-35 in your BMP4K? I bought the MB XL and there is a terrible softness when using it wide open. I contacted Metabones and they told me they know it already so they are realising a specific adapter for the pocket. However, I've been told that the ULTRA has better quality so Im tenting to switch to the ULTRA. Thanks!

[@thuytrinhnguyen8497]

Thank you very much for your video! I'm a newbie with BMCPP 4k. I'm using a Metabones Ultra 0.71x speed booster for Art Sigma 18-35mm f1.8. I like all the scenes I shot indoors, but not outdoors. When it's not sunny enough, the footage becomes blurry. Yesterday, I couldn't even focus on some leaves on a tree despite the distance between the camera and that tree was good. I found a small button on the speed booster, but not sure what and how it functions. I would appreciate it if you could let me know more about this function. It may help me film outdoors with the right level of sharpness. Thank you very much in advance!

[@ajdinzutic]

What sigma 18-35mm mount do you use with which Metabone Speedbooster? Got also BMPCC4K and dont know which tu purchase :)

[@no-trick-pony]

How are you doing the effects at 6:42? With which program? Can they be done with Resolve? I would generally be much more interested in how your workflow looks like, also now that you have switched to Resolve. Do you use AfterEffects or other programs in your workflow as well?

[@SamWelker]

This comment is to notify youtube to show me more zebra zone. Also of course i subbed. Thanks for quality videos :)

[@Crawling8888]

What about f1.2 (since this is the widest open aperture for a f1.8 lens with these speedboosters)? Did they show up a big difference in sharpness (in the center)?

[@luanphamgia9883]

hello, BMPCC4k + Metabones Speed Booster 0.64x Adapter. Aperture is work ??

[@zebrazone]

Yes !

[@robertolopezfoto]

So happy u did another video, looking forward for the next one

[@fluff1991]

Excited to say that I was here before u got to 6 digit subscribers. 6.4k subs and counting. Crazy visuals and lighting. Ur hairstyle and sailor style shirt is unique too. Got ur own style.

[@TOKYObrah]

Seriously love your tech videos. How did you create the graphic with the camera and speed booster?

[@zebrazone]

Thanks a lot ! After effects :)

[@MatiasRispau]

This is weird, maybe viltrox do have a quality control issues because mine is really sharp corner to corner, i have test it since I got it six months ago. The only thing I had to check was to adjust the lens to get infinite focus, but is a really easy thing to do. Maybe doing that will correct the focal plane and help the corners.

[@zebrazone]

Did that too. Could be too things : 1) My unit has an issue 2) Big differences only happens wide open

[@stevengergi6781]

@@zebrazone Hey Zebra did you have any changes to your viltrox? I think to purches one for my bmpcc4k but not so sure yet

[@chunkit78]

Came here after watching your switching to DR video. Excellent content

[@amybella]

Hi there, I have an older Viltrox EF-E mount, but I am noticing black circle around the corner top. The adapter says 0.71x and the camera is A6500

[@seodriven]

Great Video, entertaining and informative. One question: which Metabones Speedbooster would you recommend for EF-S Lenses to fit on the BMCP4k?

[@mr.colemak404]

You're production quality it's amazing. You definitely set a bar for what but I want to achieve when I start vlogging. I've been looking at the viltrox and the metabones. and I will likely go with the viltrox because the difference in quality towards the edges isn't as important to me as I shoot wide open. Did you see any changes when you stopped down?

[@mateodillon9412]

This comparison was really helpful, thanks a lot

[@avis911]

Hi, I am concerned about the image circle and bmpcc 4k sensor, so my concern is that not all EF lenses are equal, you mentioned the sigma 18-35 which is a fantastic lens and I own it, I am happy that it works, it is a crop sensor lens and not a full frame glass, hence the ultra or the EF -M2 works, but does the Tokina 11-16 F2.8 or the newer 11-20 F 2.8 with its smaller image circle work for this camera since its about a 1.9X crop factor? I am guessing it won't Vignette at 16mm or even 14 mm but obviously the reason to put this glass ( Tokina) in front of the camera is to harness the 11mm part of the lens. I am not quite sure if the math works for this. sure for the older BMPCC camera it works because of its 2.3X crop factor but this is a bigger sensor and hence closer to the APSC format, perhaps a 0.81X speed booster would be more effective if I am not mistaken. please correct me if I am wrong.

[@coin777]

Can you do a follow-up video and add the cheapest roxen speed booster, and compare the sharpness with no speed booster at all?

[@TPHRMUSIC]

Great video. I’m curious if you adjusted/calibrated the viltrox’s focus at all or just used it out of the box. I haven’t done any adjusting myself but I’ve heard like the metabones you can adjust the infinity focus on the viltrox. Not sure if that would have any affect on what is happening on the edges of the frame using the viltrox. Cheers

[@charles_wren_films]

Dude, your channel is fantastic. You deserve far more subs. I'm sure it'll grow over time. Keep it up and thanks for the great content :)

[@zebrazone]

Thank you Charles :)

[@fatbeets4781]

Nice info, production and editing. Subscribed!