Questions tagged [infinity-focus]
Infinity focus is when a lens forms an image with sharp details of an object at infinite distance away.
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If I collimate light with a couple lens, how do I find the magnification?
Say I have an object at 40 cm from a convex 20 cm focal length lens, then a concave -30 cm focal length lens 10 cm behind that. This would give an image at infinity, which one could take a picture of, ...
user109880
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I want to focus at far distances but close, what lens could I use?
I want to be able to set the focus at far distances, like 500 m, but in a smaller setting, like 5 m. What lens could I use to achieve this?
I have found this lens that achieves it for a FOV of 120 ...
user109880
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No more turn left to get focus at infinity (hit the lens limit) [duplicate]
Academic question: If I run out of turn attempting to achieve an infinity focus (close, but no cigar) would I:
Move the lens away from the sensor? OR
Move the lens closer to the sensor?
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Is it best to use a wide aperture when I'm focusing at infinity and depth of field is not a concern?
If I shoot at f1.4, I can easily separate my subject from background due to the shallow DoF.
In the case where I turn the focus to infinity at f1.4, I will have everything in focus, except the ...
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How do I find infinity focus with a kit lens when there's not enough light for optical verification? [duplicate]
I have a D7200 which I want to use at long distances in low light photography. The kit lens, a 18-140 does not have focus markers on it. Furthermore, the focus ring does not stop hard at any point. ...
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What does focusing past infinity look like?
Would it nearly instantly become unfocused, or would it be more or less gradual?
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Why does some lenses have red focus points on their focus rings? [duplicate]
A typical lens have white focus indicators on their lenses [5m 50m and infinity] but some have red points for 85m and farther and some lenses have a red curve instead of numbers.
What are these red ...
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How to test image quality with a camera that is focused to infinity?
I have to test a camera that is focused to infinity, but I cannot take an image of an object that is more then 1.5 meters away from the camera because I can't get it out of the room itself. (The room ...
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Background Focusing
Besides setting the lense to Manual focus, can single point Auto focus be used to
focus 'beyond' a foreground of tree branches to infinity? Living in the mountains makes long distance focusing a ...
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Hyper focal distance versus maximum focus distance before infinity
I have a Sigma 18-35 1.8 sigma lens. The latest number on the distance scale
of this lens is 2m. At subjects further than 4.22m the lens focusses at the infinity mark. The exif data confirms this, as ...
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What is the formula for determining where infinity focus begins?
I'm having difficulty find any info on determining where infinity focus begins. I'm assuming there's a formula involving focal length and... Can anyone help?
user69339
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How can I get infinity focus, both including the moon and a tree in the foreground?
I'm trying to take photos of the moon with other objects in the foreground but I can't seem to get both in focus. How far do I have to be from the tree to have pan focus (foreground and background in ...
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Why are my pictures blurry even though a DOF calculator shows everything should be in focus?
In theory, according to the DOF calculator, I can achieve infinity focus with my Sigma 10-20 at f/3.5 when focusing at a subject that's 2m away but when I put it to the test my pictures come out super ...
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Why does my Zorki 4 take blurred pics on infinity focus?
I've recently bought a Zorki 4 and the results I get from my test roll are quite disappointing.
I've been calibrating the mirror, adjusting it for both infinity focus and close one (1 meter).
Here is ...
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What is the point of the Olympus E-620 infinity reset
In the manual, it states:
RESET LENS
When set to [ON], this resets the focus of the lens (infinity) each time the power is turned off.
What does this mean?
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