View allAll Photos Tagged optical
I am short sighted and always have to wear either glasses or contact lenses. The optical correction can be seen through the lenses of my glasses as they refract the colourful lines.
It seems to keystone ... I could see it in the viewfinder too.
- Rosa's Garden of Earthly Delights, Keefer Lake, Ontario, Canada -
De Museumfabriek in Enschede, voorheen de Twentse Welle.
Het gebouw staat altijd gedeeltelijk in het water.
Gezien tijdens voorbereiding op de 40 km sponsorloop van Nacht van de Vluchteling. Voorbereiding: Hengelo- rondje Enschede 24 km
For MACRO MONDAYS, this week’s theme: "Corner".
Setting: a 15mm Optical Cube Prism was placed on a white plastic board. The rainbow colours were from refraction and dispersion of sunlight.
HMM!
♥ Thank you very much for your visits, faves, and kind comments ♥
I wanted to try some longer duration shots but I didn't take my full filter set with me to Homer this time - swift kick to self! I did happen to have a circular ND filter as part of my kit, so I gave it a try. I ended up only being able to expose for 20 seconds as any more would have overexposed the image. Even so, I was pleased with the interesting effect it produced both in smoothing the waters of Kachemak Bay as well as making the fisherman look like a ghost. He also spent some time near the chair, giving a lighter ghost image there. In a way this represents a metaphor for us, we're just a blip on the radar. Here today, gone tomorrow!
Taken 6 May 2023 at Homer, Alaska.
It appears we are looking up a hill at an Elk with the sky in the background but what we are actually looking at is down a hill with a lake behind her.
2016 July - UK holiday - Tate Modern - Kinetic Relief - Optical Acceleration 1963 1985 by Jean-Pierre Yvaral 1934-2002.
My attempt at the "Crazy Tuesday" theme "December decorations"
Shot with a Optical "Six-Proyectar 60 mm F 1.8" (projection) lens on a Canon EOS R5.
The Root Problem: Perspective Distortion
When you tilt a camera (especially upward at a building), parallel lines in reality appear to converge in the image. This is due to how light rays hit the sensor.
Vertical lines → lean inward (the “falling buildings” effect)
Objects closer to the camera → look disproportionately larger
This is governed by basic projective geometry—not a flaw, just how perspective works.
The “Trick”: Re-mapping the Image
Perspective correction tools (in apps like Adobe Lightroom or Photoshop) apply a mathematical transformation to the image.
Think of it like this:
The original photo is a distorted grid
The software stretches, compresses, and skews parts of that grid
It forces lines that should be parallel (like building edges) to become parallel again
This transformation is often a homography (a 2D projective transform).
Why It Looks Like “Optical Trickery”
The illusion comes from how your brain interprets visual cues:
a. Restoring “Expected Reality”
Your brain expects:
Vertical lines to be vertical
Rectangles to look rectangular
When software enforces this, the image feels “correct”—even though it’s been heavily warped.
b. Stretching Space Unevenly
To fix perspective:
The top of the image is often stretched wider
The bottom may be compressed
This creates subtle side effects:
People or objects near edges can look slightly distorted
Resolution is uneven (some areas lose detail)
Taunton Minster, St Mary Magdalene church.
Taunton, Somerset, UK.
Despite my best efforts it still looks a bit weird.
A watchmaker's magnifier made of brass and wood.
Based on a model by Watkins & Hill, London 1805.
Replik einer Standlupe oder Uhrmacherlupe aus Messing
und Holz. Einem Modell von Watkins & Hill London 1805 nachempfunden.
Auswahlfoto
Für "Smile on Saturday"
Thema "Optical Instruments" am 28.01.2023.
A "Happy Smile on Saturday" 😊
and a relaxed weekend for all of you.
Thank you for all your views, faves and comments.
This is NOT a photoshop 'construct'!
Raw file to prove it
The rain had stuck the feathers together below the beak creating a 'mouth like' fold and one of those feathers stuck out like a half smoked cigarette
Half of you will just see a Sparrow hawk on a stick., others will see the Al Capone face., that's all down to individual visual perception
This optical illusion effect is caused by ice crystals in the earth's atmosphere through which the light is refracted. In order for us to see these points of light, the ice crystals must grow as regularly as possible and be transparent. Another requirement is that the crystals are flat and hexagonal. Only then can the light be deflected in a straight line.
The principle works in a similar way to the rainbow. The only difference is that the rainbow deflects the light so strongly that you have to have the sun in the background to see it. If you want to observe halos, you have to make sure that you are not dazzled by the sun. Similar phenomena can also be observed at night. There are “secondary moons” that are formed according to the same principle.
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This picture let me think of you, Kostaki, it appeared in the same year, when we met each other. Coincidence? You're my magical place. I love you.
I am doing something I have not done before on this site and that is, posting the same picture twice. But I am intrigued by the optical illusion in this shot. It was taken in the early morning light which causes our brain to see it differently than it actually is. Here's the science behind it.
Brain's Assumption: The human brain is evolutionarily wired to assume that light, especially from the sun, comes from above.
Shadow Interpretation: When we look at ripples or footprints in the sand, our brain uses the shadows to determine if a feature is raised (a hill or a ripple crest) or indented (a depression or a footprint).
The Illusion: If an image of sand ripples (or dunes) is lit from below (e.g., in a photograph taken from a specific angle or a picture that is inverted), the shadows fall on the "wrong" side. The brain, still assuming the light is from above, misinterprets the shadows, causing the crests to appear as troughs and the troughs to appear as crests. The image appears inverted.
I invite you to look at this shot and tell me if you see ridges and small concave valleys or do do you see rounded crests of sand with narrow valleys. For me it switches back and forth between the two. And for me there is sometimes a third view my brain gives me and that is, the dark shadows become the raised parts of the picture. It may take a minute for your brain to switch from one to the other. When I first look at this shot I see sharp ridges which is an illusion but when I bring my eyes over to the toes of my shoes it switches to what it should be.
I would appreciate hearing about what you experience.
Un'illusione ottica è caratterizzata da immagini percepite visivamente che differiscono dalla realtà oggettiva. Le informazioni raccolte dall'occhio sono trasformate nel cervello per dare una percezione che non coincide con una misura fisica della fonte di stimolo.
Il modo in cui oggetti e colori appaiono dipende fortemente dal loro contesto. Le variabili strutturali e spaziali di una scena possono influenzare l'aspetto e la percezione.
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An optical illusion is characterized by visually perceived images that differ from objective reality. The information gathered by the eye is processed in the brain to give a perception that does not coincide with a physical measurement of the stimulus source.
The way in which objects and colors appear strongly depends on their context. Structural variables and space of a scene can affect the appearance and perception.