Perspective, Camera etc basics

Tom Foster
Tom Foster
in Other
Can anyone recomend any from-basics instruction about Perspective, Camera etc in 3D CAD? - articles, videos, books. Nothing it seems on BricsTV.

Comments

  • Tom Foster
    Tom Foster
    Sorry about the 4 icons, copied in by mistake from elsewhere. Wish this forum supported editing by author.
  • Tom Foster
    Tom Foster
    Trying to match camera position with the view of an actual photo I took, so I can maybe superimpose my model on the photo. Camera xyz is no problem, but lens focal length? (it was a zoom camera).

    In the photo jpg's Properties, I see in its EXIF data that focal length was 9mm - which in my book is extreme fish-eye - and that's how the model looks when 9mm is dialled into Brics Camera.

    So I'm wondering - is Brics Camera expecting a focal length figure as if the camera was a traditional 35mm? If so, I'd say the pic was taken at zoom of somewhere between 35-50mm FL, by 35mm standards, not 9mm.

    Anyone know how to convert this particular camera's FL data to 35mm equivalent?
  • Tom Foster
    Tom Foster
    Established a camera position and provisionally FL, saved that as Named View. So I can recall that by Save/Restore View.
    How can I lock that view axis and zoom in on the model - kind of Lock onto Look From the Camera?
    Anything I do, even simple zoom, changes the on-screen image's viewpoint.
  • Tom Foster
    Tom Foster
    Ok, I got zoom/FL answer, thanks to http://www.dpreview.com/forums/thread/3980603#forum-post-57461993 .

    http://www.digicamdb.com/specs/panasonic_lumix-dmc-f3 says the Pana has a massive 7.6mm sensor diagonal.

    http://photoseek.com/2013/compare-digital-camera-sensor-sizes-full-frame-35mm-aps-c-micro-four-thirds-1-inch-type throws more light. The diagonal of 24x36 is 43.3mm.

    So crop ratio is 43.3/7.6 = 5.69.

    5.69 x 9mm FL gives 51.2 equiv FL for my pic - about right I'd say.


  • Tom Foster
    Tom Foster
    As per first post above, I am advised that
    AutoCAD® 2009 and AutoCAD LT® 2009: No Experience Required' http://eu.wiley.com/WileyCDA/WileyTitle/productCd-0470260580.html
    has a v gd chapter giving 'from-basics instruction about Perspective, Camera etc in 3D CAD'.
    I can get that book secondhand, or 'for Dummies' etc like it.
    The question is, which version of Acad is Brics like, in this department - maybe I should look for say Acad 2012 books instead of 2009?
  • randyclark
    randyclark
    edited July 2017

    In terms of full hd camera output, I believe this can be applicable.

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