Samyang 7.5mm Micro 4/3 Pano Samples

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  1. Samyang 7.5mm Micro 4/3 Pano Samples

    #1
    Users Country Flag badders's Avatar
    Join Date: Jan 2009
    Location: East Kilbride, Scotland
    Posts: 349

    We just received our first batch of Samyang 7.5mm lenses so here's a very quick couple of test panoramas for you:

    http://www.360tacticalvr.com/showcas.../reception.htm
    http://www.360tacticalvr.com/showcas...de/outside.htm

    Both examples shot with an Olympus E-P3 on a Nodal Ninja 3 Pano Head with the T-30 adaptor. I turned off Image Stabilisation and shot at f/11 for both examples. Focus was set to just a tad back from infinity. Stitching in PTGUI Pro 9.1 Beta2 and test web pages also made from PTGUI.

    Shooting sequence was 4 around @ -15 degs plus 1 up @ 90 degs.

    You can download the source files (which include the original images from camera, the stitched equirectangular and the PTGUI project files) here:

    http://www.360tacticalvr.com/showcas...ion/source.zip (76.8 MB)
    http://www.360tacticalvr.com/showcas...ide/source.zip (78.9 MB)

    You can also see photos I took of the camera with both Black and Silver lenses mounted, along with shots of the E-P3 and lens mounted on the Nodal Ninja 3 used to make the panos here:

    http://flic.kr/s/aHsjweGpLf

    (Note: I just spotted something strange on the ceiling of the "reception" shot. Looks like PTGUI has done something odd with the tiles...)
    Last edited by badders; 09-15-2011 at 11:55 AM. Reason: Added shooting sequence



    Badders
  2. #2

    it looks to be pretty sharp in result :)



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  3. #3
    Users Country Flag
    Join Date: Aug 2008
    Location: Netherlands
    Posts: 1,733

    Thx for sharing Andrew.

    This is a nice combination concerning size and weight. The lens is like a tennis ball. Will work great on top of the pole.

    Settings seam to be LRS around 49 and URS 63 taken from your pics.

    Heinz
  4. #4
    Users Country Flag badders's Avatar
    Join Date: Jan 2009
    Location: East Kilbride, Scotland
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    I'll re-check the settings today and will publish for the NN3, NN4 and M1-S. I'm not sure yet what the optimum is for aperture and focus positions.



    Badders
  5. #5

    I did some testing on the Aperture settings before shooting my second test, and found quite a difference in quality when changing Aperture.

    Here is a sample, the only difference is 1/2 F stop.

    At F 8 it looks like this (300% crop):



    And at F 9.5 like this:




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  6. #6
    Users Country Flag badders's Avatar
    Join Date: Jan 2009
    Location: East Kilbride, Scotland
    Posts: 349

    Very interesting. Over on the Panoguide forum Smooth is saying the lens should be set to f/5.6 or f/8 but looking at this and the other images I've seen from Hans it looks like a higher f stop is giving better results.

    What distance away were those books?



    Badders
  7. #7

    Quote Originally Posted by badders View Post
    What distance away were those books?
    Appr. 1.2 m / 4 ft


    Karel



    website: http://360vr.nl
    Twitter: @360vr_nl
  8. #8

    badders RE: Reception

    I don't see anything weird in the ceiling tiles.

    What are those ghost reflections off the lights in the ceiling? Think it's from the translucent mirror?
    Last edited by DemonDuck; 09-16-2011 at 02:21 AM.
  9. #9
    Users Country Flag badders's Avatar
    Join Date: Jan 2009
    Location: East Kilbride, Scotland
    Posts: 349

    Quote Originally Posted by DemonDuck View Post
    I don't see anything weird in the ceiling tiles.


    Quote Originally Posted by DemonDuck View Post
    What are those ghost reflections off the lights in the ceiling? Think it's from the translucent mirror?
    I don't think the E-P3 has a translucent mirror. I think it's because this was shot @ f/11. I'm testing the lens today @ f/5.6, f/8 & f/11 to see which works best.



    Badders
  10. #10

    Quote Originally Posted by badders View Post

    I don't think the E-P3 has a translucent mirror. I think it's because this was shot @ f/11. I'm testing the lens today @ f/5.6, f/8 & f/11 to see which works best.
    I thought that was part of the ceiling. Oh right, this is Olympus. Sorry. Got a NEX fixation. Yeah, could be lens flare.
  11. #11
    Users Country Flag badders's Avatar
    Join Date: Jan 2009
    Location: East Kilbride, Scotland
    Posts: 349

    OK I think I've got this nailed now. Shooting @ f/5.6 seems to give the best results. I've tweaked the position on the NN3 so here's the settings for an Olympus Pen E-P3 with the Samyang 7.5mm on a NN3 using the T-30 Mount (reversed):

    LRS: 46
    URS: 63

    Here's something for a bit of fun - shot in JPEG using the ART Filter - Dramatic:

    http://www.360tacticalvr.com/showcas...tside_art.html

    I'm getting great stitch results with 4 shots around @ -15 degs plus 1 x zenith @ 90 degs.
    Last edited by badders; 09-16-2011 at 01:01 PM.



    Badders
  12. #12
    Users Country Flag badders's Avatar
    Join Date: Jan 2009
    Location: East Kilbride, Scotland
    Posts: 349

    Here's another sample. i couldn't position the camera at the same place indoors as the reception area was closed and the lights were off. So this is near the entrance and I shot 5 x bracket exposures @ 1ev and ran them all through PTGUI:

    http://www.360tacticalvr.com/showcas.../entrance.html



    Badders
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