While a perspective view cannot be assigned to a set view scale (ie 1/4" = 1'-0"), you can adjust the size of the view to make it larger or smaller.
For example, let's say you have this simple camera view set up and placed on your sheet. You want the view itself to be larger, without changing what is shown/cropped:
To change the scale of the view, select the crop boundary and go to Modify | Cameras > Size Crop:
In the Size Crop dialog, select the button for Scale (locked proportions). Then adjust the Model Crop Size dimensions as desired:
The Scale (locked proportions) option maintains the aspect ratio and the field of view remains the same.
This process can be performed in either the Camera view itself or on the Sheet.
Now what would be really sweet is if we could figure out how to set a camera view to typical focal lengths: ex: 35mm, 28mm, 50mm, etc. Each will have different fields of view but unfortunately there doesn't seem to be an elegant way to achieve this in Revit. Pretty much every other 3D software out there works with focal lengths but not Revit :(
Posted by: Dave Baldacchino | December 14, 2010 at 12:51 AM
Hi Dave,
There is an existing request item open with development for this functionality, so hopefully it's something we'll see in the future. I'd suggest leaving feedback to provide traction for the request at http://www.autodesk.com/feedback.
Posted by: Kathryn Langan | December 14, 2010 at 11:04 AM
Thanks, just added my request to the pile :)
Posted by: Do-u-revit.blogspot.com | December 15, 2010 at 01:31 PM