The Photographs and their assigned Camera must be consistent in terms of image aspect ratio and EXIF Focal length (if available). This dialog appears only when there is a mismatch. Camera Matching helps prevent camera/photo mismatches, however a mismatch can occur when manually assigning cameras and photos.
Image aspect ratio: The dimensions of the image in pixels (expressed as X by Y). The Photograph’s image size is read from the image file on disk and the aspect ratio is calculated. The Camera’s image resolution is stored by PhotoModeler when the Camera is first created. The image aspect ratio must be the same for the photo and the camera, otherwise, it will be listed in this dialog, and will likely cause problems.
EXIF Focal Length: When a digital camera (using EXIF .jpg image format) takes a photo, various data are stored in the image’s header that can be read by software known as an EXIF reader. One item of this data is the EXIF Focal length of the camera that took that image. The Camera’s EXIF Focal length is stored by PhotoModeler when the camera is first created (calibration or on photo import for an approximate camera). For example, if the focal length stored with the image was 7.6mm, the Camera’s focal length must also be 7.6mm or this dialog will appear. Note: if you are using an image format that does not store EXIF information, the EXIF focal length parameter is not used or checked.
If there is an inconsistency between either of these two parameters, your project will not be in a reliable state. An inconsistency indicates that the camera assigned to the photograph in PhotoModeler was not the camera that took the photograph. This must be fixed. Either remove the offending image from your project or assign the correct camera to this image.