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BTM_Pix

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  1. Like
    BTM_Pix got a reaction from IncriminatingPictures in Blackmagic Pocket Cinema Camera 4K   
    The camera was tilting up a bit on the original which was making the distortion look even more pronounced so I've re-done it.
    They are now closer but the Tamron still shades it if you move it in to 17-18mm so it matches the FOV of the Panasonic and the distortion is actually reduced a bit further.
    For added context, I have included a Canon 16-35mm f2.8 L lens (on the speed booster) for comparison and well.........

  2. Like
    BTM_Pix got a reaction from kye in The SINGLE SOVIET PRIME LENS challenge   
    I followed the first one.
    This is precisely one more than I would usually follow.
    Story of my life.
  3. Haha
    BTM_Pix got a reaction from leslie in Iscorama vignette   
    How about this wide ?

  4. Haha
    BTM_Pix got a reaction from kye in The SINGLE SOVIET PRIME LENS challenge   
    Ah...hang on.
    What I've just shot doesn't follow any of them apart from the lens bit.
    I hadn't actually read them as I was primarily just here for the heckling regarding the Soviet sphere of influence post World War II.
    Oh well, in the bin it goes.
  5. Like
    BTM_Pix got a reaction from Tito Ferradans in Iscorama vignette   
    How about this wide ?

  6. Haha
    BTM_Pix got a reaction from Mako Sports in Hướng dẫn cách xem tỷ lệ kèo trực tiếp hay nhất   
    Well, thats easy for you to say.
  7. Like
    BTM_Pix got a reaction from kye in The SINGLE SOVIET PRIME LENS challenge   
    OK, give me an hour
  8. Thanks
    BTM_Pix got a reaction from Kisaha in Blackmagic Pocket Cinema Camera 4K   
    If you are looking for a single lens allrounder that can be alternative to your Olympus then adapting a Tamron 16-300mm f3.5-f6.3 might be worth thinking about.
    On a speed booster it becomes slightly wider on the short end (and has a lot more range on the long end obviously  ) and a few stops faster. The speed booster also brings the f6.3 long end back to f4 as well so you won't be losing out there either and can just run it as a constant f4 if you want.
    I've just done this quick comparison on the P4K for you between it and the Panasonic 12-60mm f2.8/f4 (which is typical of the uncorrected wide end of the native lenses) so you can see the difference in the distortion at the wide end with walls and edges.
    EDIT>>>SEE POST FURTHER DOWN FOR RE-SHOT TEST
    Whilst the Tamron isn't exactly distortion free either, it shows far less than the Panasonic.
    Also, if you go in by a fraction (17-18mm unboosted versus 16mm unboosted) then it improves quite a lot more.
    Size and weight wise, its a bit less than the Olympus.
    https://www.dpreview.com/products/compare/side-by-side?products=tamron_16-300-3p5-6p3&products=olympus_12-100_4p0_is_pro
    It also has pretty decent stabilisation and the big kicker of course is the price as they can readily be found used for under £250.
    Its not without its faults (it isn't particularly sharp at the very long end but the speed booster does alleviate that somewhat) but as a run and gun all rounder it is a decent alternative.
     
  9. Haha
    BTM_Pix got a reaction from kye in The SINGLE SOVIET PRIME LENS challenge   
  10. Haha
    BTM_Pix got a reaction from sanveer in Comprehensive Sigma Fp first impressions and interview - Cinema DNG RAW internal recording!   
    What would posses anyone with any semblance of quality control of their output to publish images like these ?
    I get that there is a race to get things out first amongst those type of review sites but fuck me.
    As for the video, the least said the better.

  11. Haha
    BTM_Pix got a reaction from Brian Williams in Comprehensive Sigma Fp first impressions and interview - Cinema DNG RAW internal recording!   
    What would posses anyone with any semblance of quality control of their output to publish images like these ?
    I get that there is a race to get things out first amongst those type of review sites but fuck me.
    As for the video, the least said the better.

  12. Like
    BTM_Pix reacted to IronFilm in Behind the Scenes footage   
    I'm a madman. Do as I say, not as I do.
     
     
     
  13. Haha
    BTM_Pix got a reaction from heart0less in Hướng dẫn cách xem tỷ lệ kèo trực tiếp hay nhất   
    Well, thats easy for you to say.
  14. Haha
    BTM_Pix got a reaction from kye in Hướng dẫn cách xem tỷ lệ kèo trực tiếp hay nhất   
    Well, thats easy for you to say.
  15. Haha
    BTM_Pix got a reaction from Cinegain in Hướng dẫn cách xem tỷ lệ kèo trực tiếp hay nhất   
    Well, thats easy for you to say.
  16. Haha
    BTM_Pix got a reaction from Kisaha in Hướng dẫn cách xem tỷ lệ kèo trực tiếp hay nhất   
    Well, thats easy for you to say.
  17. Haha
    BTM_Pix got a reaction from Otago in Hướng dẫn cách xem tỷ lệ kèo trực tiếp hay nhất   
    Well, thats easy for you to say.
  18. Thanks
    BTM_Pix got a reaction from Adam Kuźniar in High frame rate video - audio possibilities?   
    Its doable with something custom written.
    You record the incoming audio to files in increasing time chunks depending on the slow down percentage that you want, to take into account the time it will take to play them back.
    So for example, lets take a half speed playback scenario.
    The incoming audio (FILE 1) would be written to a file after the first 0.5 seconds and the playback of that file would begin immediately when its finished writing but at half speed.
    Simultaneously, the still incoming audio would immediately start writing to a new file (FILE 2) which would need to be of sufficient length to cover the length of time the playback will take to complete the first file before it is ready to play this new file.
    As our first file is 0.5 seconds, it will take 1 second to playback at half speed so our new file (FILE 2) will need to be 1 second long and this will immediately begin playing upon completion whereupon we begin recording another new file.
    This file (FILE 2) will take 2 seconds to play back at half speed so our next file (FILE 3) will need to be 2 seconds long.
    As this will take 4 seconds to complete playback at half speed our next file (FILE 4) will need to be 8 seconds long.
    And so on and so on.
    I've done you a spreadsheet illustration  

    Depending on what you are going to run it on and how long the piece is you could do this in memory of course with buffers instead of writing to files.
    The audio of course will be playing back at half pitch as well as half speed but there are enough affordable hardware solutions out there nowadays to take care of that.
  19. Like
    BTM_Pix got a reaction from Otago in Comprehensive Sigma Fp first impressions and interview - Cinema DNG RAW internal recording!   
    Lack of EVF and mechanical shutter won't do it any favours and no wifi/bluetooth connectivity will be a drawback.
    Set against that from my own personal point of view though is that, as with the Leica T/CL, the L mount cameras are great platforms for M lenses.
    With offerings from Voigtlander and particularly 7Artisans offering fast and compact M mount lenses, the FP will make a great combination as the overall form factor will be smaller even than the diminutive Leica CL despite it being full frame versus APS-C.

  20. Like
    BTM_Pix got a reaction from Kisaha in Comprehensive Sigma Fp first impressions and interview - Cinema DNG RAW internal recording!   
    Lack of EVF and mechanical shutter won't do it any favours and no wifi/bluetooth connectivity will be a drawback.
    Set against that from my own personal point of view though is that, as with the Leica T/CL, the L mount cameras are great platforms for M lenses.
    With offerings from Voigtlander and particularly 7Artisans offering fast and compact M mount lenses, the FP will make a great combination as the overall form factor will be smaller even than the diminutive Leica CL despite it being full frame versus APS-C.

  21. Thanks
    BTM_Pix got a reaction from mercer in Lenses   
    This would be a good resource to find out from I think.
    He does proper conversions so you could have yours done without having to scour for a pre-converted lens.
    http://aiconversions.com/index.html
    I'd also ask Leitax the question that if you do get it converted would it then be possible to use their conversion kit.
    If they say it is then I'd be tempted to ask the converter guy the question if you buy the Leitax kit could you send it to him and he does the whole job for you ?
    Other than that, I guess you'd have to find one of these typical non-ai conversion experts to see what they think 
     
  22. Like
    BTM_Pix reacted to Robert Collins in iPad OS - making the iPad Pro a viable editing option?   
    The gnarbox 2 is the real deal when it comes to this... (had it a few weeks)
    As SD card back up it is 'ok fast' - seems to match it 75MB/s claims - also does a checksum to verify the back up - lets you backup to the Gnarbox and an external SSD simultaneously.
    Integration with Lumafusion, Lightroom CC, Photo Mechanic (via the selects app) is spot on. Wifi transfer is fast and it lets you do usb-c transfer too (over 200MB/s on my pc.) You can do in and out points straight from the Gnarbox in Lumafusion and then it only imports the in/out footage. Wish there was better integration with Premiere Pro.
    Yes, it is expensive but way better than some of the alternatives I have wasted money on (Gnarbox 1/WD passport pro).
     
  23. Haha
    BTM_Pix got a reaction from leslie in Lenses   
    Thats what I said.
    In 1981.
  24. Thanks
    BTM_Pix got a reaction from Kisaha in Blackmagic Pocket Cinema Camera 4K   
    Unless there have been firmware updates for the other manufacturer's adapters that specifically enable it, it is only the Metabones adapters that have any type of focus control from the Pocket4K.
     
  25. Haha
    BTM_Pix got a reaction from JordanWright in Lenses   
    Thats what I said.
    In 1981.
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