Pictures with a magnifying glass
The magnifying glass is the most used optical instrument. It is not the prerogative of only Sherlock Holmes-like detectives or lepidopterists. It is commonly used for precision work or to decipher details too small to be seen with the naked eye.
Monitor resolution, print resolution
The resolution of a monitor varies greatly from one device to another. Smartphone, tablet or computer monitor, how does it change the display of images?
Perspective, correction in two steps
Wide-angle lenses make the lines converge in low angle. The software corrections correct this, but crop strongly. This problem can be avoided in two shots. Software correction of the verticals of a low angle view requires a strong cropping of the image. By mixing two views, one shot parallel to the vertical lines, the other […]
Lens Corrections
The perfect lens does not exist. Chromatic and geometric aberrations distort images. Software corrects them during shooting or later in post-production.
Blurring Out Sharp Backgrounds
Background blurs sometimes show sharp transitions due to a blooming effect. Local blurring of these areas brings visual coherence to the image.
Shadows/Highlights in Photoshop
Photoshop has included a Shadows/Highlights adjustment for almost 20 years. Is it still relevant in the age of Lightroom? For JPEG and TIFF formats, it has not said its last word.