It is critical, when shooting buildings, that the vertical and horizontal lines are kept true. With the use of a wide angle lens, curvature becomes more prominent near the edges of the frame. The wider the lens, the more pronounced the curvature. As well, one must stand considerably further back to ensure that all of the building is in the frame. This results in a smaller image.
With the use of a wide angle lens, one must rely on post processing corrections to make verticals true.
In the following example, the lens used was a 35mm. The first image shows the amount of offset the vertical lines are from being true. This is the as-shot image. The second image is the corrected image using Lightroom. The light standards and building became true, but the post sign on the left shifted and did not become vertical. Merging these 2 images together, you can see what was done to the image to achieve this correction. The green Nissan signs and light blue standards is the corrected image.
Note the amount of vertical downward displacement Lightroom did to the image to achieve vertical true. A lot of detail at the bottom of the image could have been lost if this was an interior shot using a wide angle lens.
A photographer using a wide angle lens must take into account the potential cropping done in order to achieve the correction and plan for it accordingly during the shooting.
With a tilt shift lens, minimal correction is required in post. The difference in use between a tilt-shift (hereafter called TS) lens and a wide angle lens is that all of the subject needs to be captured in the frame. A TS lens has the advantage of shifting. Thus, shifting allows the photographer to capture multiple images of the subject and stitch the images together to create one image. As well, the big advantage of using a TS lens is that with the same focal length, with a wide angel lens, one must stand considerably further back to ensure that all of the building is in the frame. This results in a smaller image
Uncorrected
Corrected
Super Imposed
Medicine Hat Alberta Canada
Service Area - Central & Southern Alberta
All Rights Reserved | Hari Singh Photography | Privacy Policy