8
votes
Do very short shutter speeds result in diffraction?
I know this is an old question, but just wanted to contribute a photo that exhibits a shutter-induced diffraction effect. My Nikon 1 V2 camera has both a mechanical shutter and an electronic one. When ...
- 659
8
votes
What is the difference between Diffraction Spikes and Lens Flare?
Diffraction spikes are caused by diffraction at the edge of the aperture. The number of spikes relates to the number of blades and the intensity of the effect relates to the exact shape of the blades ...
- 181
6
votes
Is it better to shoot at diffraction limited aperture or sharpest lens aperture?
"its known that lenses are generally sharpest at the F/8"
That is not correct. Some lenses are sharpest at f/8, most reach their max at one to two stops from wide open, and some are sharpest when ...
- 19.4k
4
votes
Accepted
Is this just chromatic aberration? Or is something else happening in these photos?
The primary reason both images look blurry is because in both of them the point of sharpest focus is closer than most of the scene. Shooting with a wide open aperture minimizes depth of field, so ...
- 176k
4
votes
Can the diffraction limit be overcome with superresolution?
Can the diffraction limit be overcome with superresolution techniques?
Sort of, to a limited degree. Using sub-pixel shifting of the imaging sensor, in effect you are increasing each pixel size while ...
- 33.3k
4
votes
What kind of lenses with a "slightly different diffraction behaviour" were used in "large format photography in the 1980s"?
Apodizations filters in large format lenses were very popular in the 1980s. The baffles in such lenses can significantly affect the diffraction characteristics of such lenses.
Although lenses such as ...
- 176k
4
votes
Accepted
Can the diffraction limit be overcome with superresolution?
In essence, no - the diffraction limit cannot be overcome if we want to create a natural color picture.
Even with an optically perfect lens, the resolution will always be limited by the Rayleigh ...
- 121
4
votes
Accepted
Airy disks and pixel pitch on circle of confusions?
Pixel pitch does not determine the standard CoC limit, and it is not a factor considered in the DoF calculations.
That's because the accepted CoC limit for normal viewing by an average individual is ...
- 19.4k
3
votes
Airy disks and pixel pitch on circle of confusions?
I am not sure if you are trying to juxtapose claim about machine learning and claim about human vision. These are very different scenarios and clearly the CoC is defined differently. Even though the ...
- 5,553
3
votes
Why does the rainbow change into a green light when zooming using iphone
The Rainbow Maker is a device that rotates a prismatic 'jewel' to move different colors across a space as it's struck by sunlight. Unless your experience is repeatable over a number of exposures, I'd ...
- 6,819
3
votes
Can the diffraction limit be overcome with superresolution?
All camera optics are plagued by twin demons of interference and diffraction. These yield stray light rays that comingle with the image forming rays. Diffraction is caused when light rays from the ...
- 39.7k
2
votes
Accepted
Is diffraction limited aperture independent of lens?
You're confusing diffraction limited aperture (DLA), which is where the effects of diffraction are first barely detectable using a specific digital sensor, with the diffraction cutoff frequency, which ...
- 176k
2
votes
Accepted
What does Canon digital lens optimizer (DLO) do exactly?
Does it use just some generic manufacturing info or can it take into account some programmed calibration data stored in the lens, as predicted by Roger Cicala in “This Lens Is Soft” and Other Facts?
...
- 176k
2
votes
Accepted
Is there an online lens diffraction and maximum sharpness table?
Diffraction
For the Canon EOS 1300D, you can see the calculated DLA of f/6.8 at that camera's review at The-Digital-Picture. Bryan also has a short article about what DLA is and how it affects images.
...
- 176k
2
votes
Accepted
Is it better to shoot at diffraction limited aperture or sharpest lens aperture?
As is usually the case, it depends on your scenario.
The "best" aperture, which I will interpret as being the aperture at which the lens produces its maximum resolution results, will not necessarily ...
2
votes
Why does the electronic shutter prone to diffraction?
No, it's the opposite, the edges of the mechanical shutter diffract light, while the electronic shutter is not affected because it does not exist; there is no physical element that might cause the ...
- 5,069
2
votes
How can we calculate effective megapixel loss due to diffraction?
Maximum recordable resolution based on sensor size and aperture (diffraction); for blue/green/red wavelengths (green being most important).
The sensor's resolution is (mostly) irrelevant unless it is ...
- 19.4k
2
votes
how to find best FX camera to avoid diffraction at small apertures
This is only possible by a system that corrects for the effects of diffraction in post-processing. For example Canon's Digital Lens Optimizer can somewhat negate the effects of diffraction. I'm not ...
- 6,855
2
votes
Airy disks and pixel pitch on circle of confusions?
The CoC is traditionally based on what will be visible in the final picture. It's not affected by pixel size, because frankly you can't see individual pixels on any reasonably sized print taken with ...
- 1,495
1
vote
Airy disks and pixel pitch on circle of confusions?
Check out Photographic Lenses by C.B Neblette:
Paraphrased:
The circle of confusion size is based on the diameter of the largest circle which will appear as a point from a given viewing distance. ...
- 39.7k
1
vote
how to find best FX camera to avoid diffraction at small apertures
Diffraction and maximum resolution are just opposite sides of the same factor, aperture size. For a given aperture restriction, the size of the airy disks will be the same regardless of all other ...
- 19.4k
1
vote
Sweet Spot on Zoom Lenses on APS-C CMOS sensors?
First, let's talk about diffraction
Your 80D has a 26 MP sensor with pixels only 3.72µm wide. That figures out to a diffraction limited aperture (DLA) of f/6.0.
Diffraction Limited Aperture (DLA) is ...
- 176k
1
vote
Accepted
What is the difference between Diffraction Spikes and Lens Flare?
Diffraction
Diffraction causes light to spread out, when moving through the aperture of a lens, perpendicular to the straight edges of that aperture. This causes the spikes that bleed out from point ...
- 20.5k
1
vote
Can the diffraction limit be overcome with superresolution?
Yes but you are trading one type of information for another - it doesn't break the laws of physics or information theory. You have to assume the object is stationary and you are trading signal to ...
- 564
1
vote
Do smaller apertures provide more depth of field past the diffraction limit, even if peak sharpness suffers?
Not strictly an answer to OP's comment about Peterson, but useful to some:
Diffraction blur is very well defined. Knowing the f/stop and the focal length the blur can be removed with very few ...
- 1,778
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