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Lenses for 2.35:1 "cropping"
  • Suppose 2.35:1 is made by cropping top/bottom of 16:9 clips.

    .75x on 16:9 gives roughly 2.35:1 ratio.

    Let's say we want 24mm/35mm/50mm/85mm/135mm "like" focal lengths on the anamorphic ratio.

    Here goes simple math for GH2 configuration.

    • 24 / 1.83 * .75 = 10mm
    • 35 / 1.83 * .75 = 14mm
    • 50 / 1.83 * .75 = 20mm
    • 85 / 1.83 * .75 = 35mm
    • 135 / 1.83 * .75 = 55mm

    Just an idea ;)

    More information about wide angle converter for 14mm 2.5: http://www.personal-view.com/talks/discussion/comment/39847#Comment_39847

    See this link to draw 2.35:1 lines on LCD screen protector.

    Here's DIY fake flares anamorphic adapter. I found this link while browsing @shian's vimeo works. Highly recommend his http://ColorGhear.com site.

    How to set 1920x818 anamorphic cropping from Premiere Pro

  • 34 Replies sorted by
  • I wish I can close this topic. It was a wrong approach....

  • @simurg Forget about my math. Wider angle might give the same x and y axis framing, but it can't mimic the z-axis or background framing.

    Just use your preferred focal length on 16:9 ratio. Make sure you get framing right so that you get enough room for cropping. That'll do it. Just don't substitute with shorter focal length if possible.

  • @simurg it's focal length x crop factor (1.83 approx for GH1/2) divided by anamorphic stretch. Although it's not that straight forward, as your vertical focal length equivalent won't change, but your horizontal will.

  • @gh2hacked the 2x anamorphic is 'the' look. 1.33x, although rendering a nice 2.35 with nice flares on 16:9, doesn't quite give that true anamorphic look. 1.5-1.75x with horizontal cropping is a good compromise.

  • I want to use 2:35 cropping for new film. Which lenses can I use with the best frame and dof for GH1.

    My lenses:

    *Sigma 24mm 2.8

    *Vivitar 28mm 2.0

    *Vivitar 28mm 2.5

    *Beroflex 35mm 2.8

    *Minolta MD 50mm 1.7

    And @stonebat you say; "Here goes simple math for GH2 configuration.

    24 / 1.83 * .75 = 10mm

    35 / 1.83 * .75 = 14mm

    50 / 1.83 * .75 = 20mm

    85 / 1.83 * .75 = 35mm

    135 / 1.83 * .75 = 55mm "

    For Gh1 to this calculation 1.83 or 2

  • I don't know about you guy but after using anamorphic, I can't shoot without it. I personally don't like the anamorphic filter thou. They sharp but gives weird flare on certain lens. I uses a bunch of lens and find that the century anamorphic gives the best result. All the 2X aspect ratio on kowa for example is to much stretching. Look kind of weird to me. The Century and Ag-La7200 is the best in my book. The Century has better build quality and also more compact.

  • Not having anamorphic lens isn't the end of the world though.

    Those phone cameras have inherently short focal length. The z-axis distortion makes background object looking further away. But it's just fine. Let it be.

  • That would work fine. I'm talking about outdoor shots.

    See the attachment. It was shot with 50mm focal length lens + 1.75x anamorphic lens. Notice how the cars are lined up in the street. 50mm focal length is equivelant to the human eye in terms of z-axis distortion.

    Screen Shot 2012-07-27 at 6.51.54 PM.png
    1680 x 1050 - 1M
  • @stonebat I do have an anamorphic lens, but it would be nice to inter-cut footage that is cropped from a non anamorphic lens, and maybe match the look through the addition of... just not sure what yet? :o)

  • Oval bokeh with DIY paper cutout and cropping in post works rather well with my 50 1.4. I rather add flares in post to control them better.

  • @matthere Forget about software. I'd get an anamorphic lens if I really want true anamorphic.

  • @stonebat might it be possible to add "some" distortion" by changing away from square pixcels? It would stretch uniformly, but it might bring some similarities to the anamorphic footage? I don't know if there are any plugins or techniques that can distort footage in a way that would more closely approximate anamorphic glass?

  • At least I know this simple cropping can never mimic the anamorphic look and feel... due to z-axis distortion on background image. The simple cropping would yield wider background than anamorphic's.

    Z-axis distortion is correlated to the focal length. Simply cropping wider lens can't mimic the background z-axis distortion from more tele lens + anamorphic lens. Darn...

  • Simply dividing focal length by anamorphic ratios isn't quite right though. It only changes the horizontal FOV. When dealing with subjects, the vertical ratio is still the same, it's not like switching to a lens with a shorter focal length.

    When I approach anamorphic shooting, which usually includes people in the shot, I'm still the same distance away from the subject, attachment or not, as they still need to physically fill the vertical frame the same. However, I do have a different composition.

    To me anamorphics are more compositional tools than focal length adjusters. Although I do appreciate if you're comparing larger sensor (FF/APSC) matte cropping to mFT anamorphics the similarities start to converge.

  • Here's a nice blog about comparing m43 format to Super35mm format. http://filmsbyshaun.com/the-switch-to-micro-43-and-super35-equivalent-fov/

    The blogger concludes m43 equivalent to the most common Super35mm focal lengths are 17/25/35/60. Darn close to my conclusion. But Super35mm + 1.33x Anamorphic lens gives 2.35:1. To simulate the same FOV on m43 when cropping 16:9 to 2.35:1, m43 set would be either 12/17.5/25/42.5mm or 14/20/30/50mm.

    It's no coincidence that the former set is nice for 4:3 ratio, too. Practicing 4:3 photo framing will improve the anamorphic cinematic framing.

  • I like taking 4:3 photos from GH2. It helps capturing more vertical framing for candid style. I mean... who would like headless portraits? Getting familiar with 4:3 photo helps this anamorphic cropping trick.

    Let's say one likes Vimeo videos taken by GH1/2 + 35mm + 1.33x anamorphic lens. Simply dividing the focal length by 1.33 gives 26.3mm that is just a tad bit longer than 25mm.

    First draw the anamorphic horizontal lines on GH1/2's LCD protector. Have 25mm lens on the camera. Without pointing the camera, eyeball the imaginary 4:3 frame as if using 35mm lens. Then use the camera and do the real framing from the same standing place. The anamorphic box on the camera's LCD would look very close to 33% wider than the imaginary frame. Easy huh?

    Here's a list of such mapping. Divide by 1.33 then make a bit wider to accomodate the difference between 4:3 ratio's 2x crop and 16:9 ratio's 1.83 crop.

    • 85mm -> 58mm
    • 50mm -> 35mm
    • 35mm -> 25mm
    • 24mm -> 17.5mm
    • 18mm -> 12mm

    Isn’t it looking pretty?

    20120501-P1020810.jpg
    960 x 408 - 150K
    20120502-P1020845.jpg
    960 x 408 - 223K
  • @stonebat But the SLR Magic costs $500? I just bought a 6mm 1.8 with adapter for $20. The Computar he mentioned is a bit more expensive now, at around $50-100 depending if you get lucky or unlucky. Still there's lots of decent C-mounts in the sub $50 range that would make a nice fake anamorphic imho.

    Also Goyo makes a 1" machine lens at 25mm and F.95 for around $400. I never had the guts to try and buy one, but if it doesn't vignette...could be seriously awesome and even if it did vignette a bit, might still work for 2:35 cropping.

  • Thanks for the info. That was written before 12mm 1.6 was available ;)

    BTW some Chinese company is working on 35mm 0.95. Does m43 need such lens? Sure why not.

  • @EOSHD posted on his site a while back that some c-mount lenses might give the fake anamorphic look and be cheaper than most of the new lenses.

    He says in that post that that 12.5mm vignettes quite a bit on the GH1 but if you crop to 2:35:1 almost all the vignette is gone and the wide angle gives a nice look. If you got the GH2 you can use ETC and get even wider c-mounts and those lenses will give you added...."character".

  • At 16:9, I like 14mm, 25mm, and 50mm. At 2.35:1 cropping without using anamorphic lens, I like 11mm, 17.5mm, and 35mm. There are a couple of drawbacks or characteristics to this approach.

    The wider lenses would give deeper DOF. If the lenses are fast, it wouldn't be a showstopper. But fast lense ain't cheap. E.g. crazy fast 0.95.

    Usually camera lenses have short throw toward infinity. Using wider lens implies focusing closer to infinity which requires more precision control.

  • I'm sure a hacked GH2 is only a part of the equation. Thus GH2 != cinematic look. It's just a tool. A nice tool :)

    Anyways I hope some people don't take the equations from the 1st posting literally. My point was that wider angle "might" make framing easier for 2.35:1 ratio without using anamorphic adapter. I'm taking 11-35mm range more seriously though :)

  • @fatpig - the details are on the vimeo page, but yes, except for 'Love or War' which is a feature I shot on the GH2 which is in post right now.

    People are blown away by the GH2. So I buy a GH2, and shoot one short with it, someone from that set raves about it to a friend, who calls me and asks to see footage, then I get hired to shoot their film, and then the cycle continues, until you get a call to shoot a feature, and then the next thing you know you're shooting the opening titles to a studio film on the RED, and so on. The budgets on the shorts are always very small, otherwise I would shoot with a RED, only because it's so much easier to do so. I'm constantly fighting the limitations of the GH2, which is an extra battle I'd like to not have. BUT it sure beats shooting on a fixed lens video cam. The more I use it, the more I'm aware of it's limitations in what I'm trying to do, but it's still the best camera I've ever OWNED, and the best DSLR I've ever shot with.

    There should be more imdb credits going live soon from "Seeing Other People", "Love or War", and "What Lies Between Us", and as one of the producers I just worked with put it, I'm quite possibly creating a new production crossbreed - the Cinematographer/Colorist, as the credits that I will getting on all of those projects will be for both shooting and grading the project. So the look of my footage is a combination of factors, the camera, my lighting, and the grading.

  • @shian: some of the most cinematic GH2 pictures i've seen. Are these excerpts of your short films? You seem to make a lot, since the GH2 is not that old. :) tell us, please

  • got it, thank you, very nice work by the way

  • no idea, it just picks up whatever light is shinning on it and acts like a sort of prism, for instance, the shot of the couple making out in the car was lit with color temperature blue fluorescents, but the flare came from a warm temperature flashlight pointed at the lens. the purple flare came from a light that was gelled purple.