If it is in “mm” why not use something that people are more used to (50mm as standard) than 57mm? and change the way its calculated to do “expected” behavior.I do not remember what SketchUp displays in unit when it ships.F1.0 super-aperture collects more light to produce brighter images. You can adjust the FOV between 1 and 120 degrees (the default is 35 degrees in SketchUp and 30 degrees in SketchUp Pro).” DS-2CD2T47G2-L 4 MP ColorVu Fixed Bullet Network Camera Hikvision ColorVu technology provides 24/7 vivid colorful images with F1.0 advanced lenses and high performance sensors. States that “One is when the field of view (FOV) is set very wide. In Clipping & missing faces - Clipping and missing faces | SketchUp Help Then, depending on the resolution, all the pixels of the sensor might or might not be taken. (V) refers to the vertical (D) refers to the diagonal fov (commonly used). I believe these two are default value of SketchUp 2015 Pro. Since the sensor is a 16/9 sensor, the field of view vertical and horizontal are not the same : (H) refers to the horizontal field of view. Therefore, it shows 57mm as default field of view, but if i use “deg” unit and restart sketchup, it would display “35.00 deg.” I also have noticed that SketchUp seems to remember what unit that I have used for the last time. I have noticed that I can type “35mm” or “35 deg” in field of view VCB. A SketchUp view with a FOV of 50mm is considerably more wide-angled than in a camera with a 50 mm focal length lens for a view where the width is bigger than the height. In SketchUp the FOV is measured vertically across the model window, while the shape of the window varies, whereas in a camera the measurement applies to a diagonal of the picture frame that has fixed 2:3 proportions. Just a note about the field of view in SketchUp: The FOV numbers do not match the ones given to a 35 mm camera lens. So, if I choose a focal length of 25mm (which is about 1') then a working distance of about 1140mm (45') is required. The ratio of working distance to focal length is 381mm/8.47mm 45:1. In fact, I find 4:3 a better ratio for most subjects, and 16:9 better for horizontal landscape shots.Īs for using focal length as FOV designation, I personally think it's less than ideal.Confused about Field of View Camera Settings Example 4 (Using Flexible working distance): My FOV is 508mm x 381mm, my sensor size is 8.47mm (diagonal). I wasn't implying that 3:2 should be the standard. What I wanted to learn is the horizontal FOV of various aspect ratios when a specific diagonal FOV is given. As long as the comparison is between various aspect ratio / lens combinations that provide the same diagonal FOV (75.4 degrees), you can simply forget about the "28mm" designation and freely switch those groups around. r 2 f sin(/2) where r is the distance from the centre in the projection plane of a point that is visible under angle. Not really, the reason I listed 3:2 first is because "28mm" lenses used in non-3:2 cameras are listed so with the equivalent 28mm focal length of 135 film (a 3:2 format). Michel Thobys webpage has the following formula for the equal-area projection. Well, you're defining your own standard there by suggesting thatģ5mm equivalence should be rated on a 3:2 assumption. They're both still wider than most, but not quite 28mm. That means that the LX1 at 65.4 degrees is slightly short of the 67.9 degrees it should offer, and the FX01 at 60 is even farther off its target of 63.5 degrees (to be a real 28mm equivalent lens). The diagonal field of view (FOV) of the camera is determined by the. I didn't yet get to read the entire thread, but I now have all the numbers:Ĥ:3 (Normalized to diagonal FOV of (horizontal) (degrees) 63.5ġ6:9 (Normalized to diagonal FOV of (horizontal) (degrees) 67.9 lens projects the light illuminated or reflected from a light source or an object on the IS, respectively. That the 75 deg standard is determined on the full sensor diagonal There's a long recent thread on this where we concluded I think
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |