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I have two cameras in my project but they are shown differently (one is represented bigger than the other), although they have the same focal length and the same sensor size (and the same scale). Are there any other properties that are considered when drawing the camera representation?

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Yes. Size property under Display category in the Camera tab in the Properties Editor is precisely for that - the size of the camera displayed in the viewport.

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  • $\begingroup$ Good! Thanks. I do not have the "m" after the size and I am not sure what are the units (I had 0.5 in one camera properties and 1.0 in the other camera properties). $\endgroup$
    – MadMage
    Commented Jan 2, 2019 at 13:20
  • $\begingroup$ There are no units then. You can set them in the scene properties. There is some really nice functionality in Blender's input fields if units are set to something. Say if you work in meters, but you have some measurements in any other units like inches for example. You can then just write them in inches ending with 'in' and they will be converted automatically. I find it extremely useful. Even with modal operators like grab when inputting numerical values during the operation it's possible after you hit Numpad *. It doesn't work with units not set. $\endgroup$ Commented Jan 2, 2019 at 13:42
  • $\begingroup$ However, what are the "size" referring to? If I put 1.0m the camera happens to by long about 0.9m. $\endgroup$
    – MadMage
    Commented Jan 7, 2019 at 14:27
  • $\begingroup$ It refers to the units set, If it's meters than it is meters, if it is not set, then it is 'a unit'. I think it is weirdly a 'radius' of the camera object displayed - a half of the length across the longer dimension. It makes little sense if you think about it probably, but it is not something that matters a lot... $\endgroup$ Commented Jan 7, 2019 at 15:10
  • $\begingroup$ unfortunately this has a maximum size of 1 km :( $\endgroup$
    – endolith
    Commented Sep 13, 2020 at 19:39

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