I completely agree that the perspective sloping adds to this image and have found through trial and error that when photos are taken looking up towards an object with the star trail or similarly a star burst filter, the sloping adds an extra dimension. As in this case, the image can also be used as an arrow to emphasise or draw the eye to an effect or the centra of an image.
Could you tell me if a filter was used to take this image please? Cracking shot
