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Julian

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  1. Julian
    http://www.sigma-global.com/en/lenses/cas/product/art/a_18_35_18/images/specifications/construction_thumb.gif This is the lens construction. I wonder if they achieved this with some kind of 'Speed Booster' alike lens elements. The last bit could be the focal reducer?   In comparison the Sigma 24-70mm f/2.8: http://www.sigmaphoto.com/sites/default/files/571-lens-construction.gif
  2. Julian
    A 18-35mm zoom (for aps-c-sensors) with a constant aperture of f/1.8? Sounds unlikely, Sigma just did it!   http://www.sigma-global.com/en/lenses/cas/product/art/a_18_35_18/features.html   This will be sweet on a Nikon D5200/D7200 (or Canon aps-c-camera, if you insist :)) en the MFT Speed Booster arrives, it will be awesome on the GH3 and pretty cool on the BMPCC aswell...   With the recent 35mm f/1.4 Art and 30mm f/1.4 DC Art Sigma showed great performance. Hope this 18-35mm f/1.8 lives up to it.   Price? No idea. Not cheap... but the excellent Sigma 35mm f/1.4 Art is relatively cheap compared to the competition. I think €1000 would be a pretty good price for this zoom. Could be a bit more...
  3. Julian
    Nice, looking forward to it!
  4. Julian
    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.
  5. Julian
    http://www.ebay.com/itm/ISCO-65mm-Cinemascope-Ultra-Star-PLUS-2-1-Anamorphic-Projection-Lens-/321103768417?pt=AU_Lenses&hash=item4ac346ab61
  6. Julian
    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 :)
  7. Julian
    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.
  8. Julian
    DxO is irrelevant for video. DxO measures raw sensor data for stills. They don't measure anything video-wise.
  9. Julian
    They are pretty expensive. If you have the time, read a lot about the subject (start with all the topics in this forum... ;)) and try to figure out how much a certain anamorphic is worth. That's quite difficult, because prices vary a lot... but still.   The Kowa for B&H is a good lens to start with I think. Reasonable size, and if you're lucky you can buy one for a good price. http://www.eoshd.com/content/558/kowa-anamorphic-lens-review   But prices vary a lot, I see them going sometimes for € 200 but also for € 600 or more..
  10. Julian
    Nice interview indeed. I'd like to have lossy compression in the pocket as an option. Bring that file size down a bit :)
  11. Julian
    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: http://us.c-mount.passion.pro/article/Computar+6mm+f1.8.html
  12. Julian
    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.
  13. Julian
    I think you have to decide for yourself what is most important. Image Quality: BMPCC probably wins big time with the dynamic range and the raw editing options - But the GH3 is still very good Ease of use: GH3 - Flip-screen, oled viewfinder, lots of buttons, touch screen. Reasonable file sizes Lens flexibility: Both pretty flexible, GH3 wins because finding good wide angles or bright standard lenses for the BMPCC is going to be more difficult (and expensive) with the 3x cropfactor. The GH3 is a much more complete camera than the BMPCC. The Pocket is just the cheapest way to get raw footage.
  14. Julian
    You got lucky with the clamps! :) (depending on the price of course, but they are great).   Just google the filter thread size of your M42 lenses and you'll know what step up / step down filters you need.
  15. Julian
    You can walk into a store, grab a GH3 and start shooting today... that's definitely a big plus for the Panasonic :) Good to see DPreview teamed up with you Andrew! The GH2 was misunderstood by many Photographers I think. Still many Canon (video)shooters have no idea that this small chip can give better images than a fullframe 5D in many aspects. Spreading the word on DPreview might help :)
  16. Julian
    I'd go with a Seasonic X-850 80+ Gold PSU. It is 80 Plus Gold certified, more efficient than the Corsair (80 Plus Bronze). Seasonic is a very well reviewed high end brand for PSU's. They are also quiet. The Corsair will do fine I suppose, but I don't think the price difference will be that big. http://www.hardwaresecrets.com/article/Seasonic-X-Series-850-W-Power-Supply-Review/1169   You didn't specify the RAM. But I suppose it's a sh*tload :)   Everything else looks good to me. Not sure if a liquid cooling system is worth investing in though. Depends on the price.. With a high end air cooler you can get pretty far I think. I wouldn't spend a lot to go that extra 10%. But I'm not so much into overclocking anymore.
  17. Julian
    Maybe.. depends on the lens I think. Wide angles are the risky ones. Someone is selling a Kinor 10-100mm zoom here and says it covers the Ikonoscop sensor. At 10.56 x 5.94 mm the Ikonoskop sensor is a bit smaller than the BMPCC though (12,48 x 7,02) http://www.ebay.com/itm/16OPF12-1-2-5-10-100mm-s-n-900432-Can-cover-sensor-of-camera-IKONOSKOP-New-/150670049559 If someone owns such a lens and a GH2 + adapter it would be easy to test and add to the list I'm making: http://www.eoshd.com/comments/topic/2513-pocket-cinema-camera-c-mount-compatibility-list/
  18. Julian
    Thanks Mirrorkisser! I would do it for myself anyway, but I'm sure more people are interested so I'm glad to share. Also it would be nice to combine our knowledge and make this list grow together! I'm sure there are more people with C-mount glass here :) Other mounts, like B4 are welcome as well of course.
  19. Julian
    Andy Lee sent me some files, I cropped them and added them to the list. Thanks Andy! All shot fully wide open apeture on Panasonic GH2 with nostalgic profile. Computar 16mm f/1.4 Cosmicar 25mm f/1.8 Pentax 25mm f/1.4 Wesley 25mm f/1.4 Ernitec 6-12mm f/1.4
  20. Julian
      Wouldn't recommend the GF3, no manual controls is cumbersome. Also it is not as sharp as a GH1/GH2 even with a high bitrate hack.   $350 for a GH2 is going to be difficult I think. A GH1 might be a good option. NEX-5N too.
  21. Julian
    Pretty sure i'ts not made for 1" sensors, so it will vignette most definitely. By the way: the EXTC mode of the GH2 is smaller than the BMPCC sensor, so if your lens covers the image in EXTC, it's not guaranteed it will on the BMPCC. If the corners are poor in EXTC, it will be worse on the BMPCC. just eBayed a Canon TV Zoom C6x17 17-102mm f/2, this is made for 1" sensors and I saw some pictures on flickr where it covers most of the m43 frame, so it will be safe on the BMPCC. It will turn into a 51mm-306mm f/2 on the Pocket. I'm curious how it will look when I use an anamorphic on it to get a bit wider..
  22. Julian
    Shame Blackmagic makes this more confusing than it is. Guys, there is no doubt that the cropfactor is 3x, the sensor measures 12,48 x 7,02 mm. You can calculate the diagonal and compare it to fullframe and the cropfactor is 3x. Fact.
  23. Julian
    This kinda results you get when you use them on image sensors bigger than what they are made for. With the BMPCC sensor it won't be so bad if you use 1" lenses. You probably will have to stop down to get sharp corners, but thats with about every lens. For example, from my test: Computar 25mm @ f/1.8: http://www.eoshd.com/comments/gallery/image/242-computar-25mm-18/ Computar 25mm @ f/5.6: http://www.eoshd.com/comments/gallery/image/244-computar-25mm-56/ This might be a nice wide angle: http://www.ebay.com/itm/330905355354?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649 Canon TV-16 6mm f/1.8 Apparently it is made for 1" sensors, so it should cover the Pocket nicely. Looks lovely, there is a downside though, it's fixed focus (hyperfocal). I'm not bidding on it, wonder for what price it will go.
  24. Julian
    The 8.5mm cosmicar and 8mm 1.3 Tokina I tested are for 2/3" I think. The cosmicar is for sure. I don't consider it useable. You might have luck with longer lenses, but even the Tokina 16mm vignettes as you can see.
  25. Julian
    Tokina TV Lens 8mm f/1.3 Tokina TV Lens 16mm f/1.6 Vignetting is worse stopped down and focused at infinity. Kowa TV Zoom 12.5-75mm f/1.8 Can't get it to focus properly. This is shot at the widest setting, if you zoom to 75mm it just about covers it, but quality is poor, lots of distortion. $25 eBay 25mm f/1.2 Works, but the lens is difficult to use. No focus or iris marks. Shot wide open: $5 eBay 8mm f/1.2 fixed iris lens for 1/3" sensor Probably CS mount, only works as super macro and obviously it is made for very small sensors.
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