Pixel pitch vs. diffraction limits
brian
•
Senior Member
•
Posts: 1,211
Diffraction effects minimal
8 micron pixel pitch is only 63 cycles/mm. At this frequency a diffraction-limited f/8 lens will give a contrast greater than 60%, which is quite high. You can easily drop down to a 4 micron pixel pitch before diffraction effects start to get really noticeable. On a DX-sized sensor this means you can increase the resolution to at least 24 megapixels and still get meaningful information with good lenses stopped down to f/8 or even f/11.
Brian
michaeladawson
wrote:
There was a message posted somewhere... maybe in the Canon forum,
that talked about pixel pitch and its relationship to diffraction
artifacts.
The basic assertion was that a pixel pitch of
8 microns was around
the limit for tolerable images. At this pitch diffraction effects
began to appear at apertures smaller than f/8. If you decreased
the pixel pitch diffraction effects would start to appear at
apertures larger than f/8.
If you believe this assertion and you do the math the conclusion
was that APS sized sensors couldn't really go past
8MP without
introducing serious diffraction effects at larger apertures.
Would anyone care to comment on this? The fact that I have never
heard this before leads me to believe that it is a bunch of bull.
On the other hand, if true, Nikon's APS sized sensors may have a
serious limitation.
Post
(hide subjects)
|
Posted by
|
When
|
|
|
|
Sep 4, 2003
|
|
|
|
Sep 4, 2003
|
|
|
|
Sep 4, 2003
|
|
|
|
Sep 4, 2003
|
|
|
|
Sep 4, 2003
|
|
|
|
Sep 4, 2003
|
|
|
|
Sep 4, 2003
|
|
|
|
Sep 5, 2003
|
|
|
|
Sep 5, 2003
|
|
|
|
Sep 5, 2003
|
|
|
|
Sep 5, 2003
|
|
|
|
Sep 5, 2003
|
|
|
|
Sep 6, 2003
|
|
|
|
Sep 6, 2003
|
|
|
|
Sep 5, 2003
|
|
Keyboard shortcuts:
FForum
PPrevious
NNext
WNext unread
UUpvote
SSubscribe
RReply
QQuote
BBookmark
MMy threads
Color scheme?
Blue /
Yellow
Fujifilm's X-H2 is a high-resolution stills and video camera, that sits alongside the high-speed X-H2S at the pinnacle of the company's range of X-mount APS-C mirrorless cameras. We dug into what it does and what it means.
Holy Stone produces dozens of low-cost drone models aimed at consumers. We look at the HS710 and HS175D to see if they stack up to other sub-250g offerings. Are these secretly great or more like toys?
It's small, light, cheap and extremely wide but is it any good?
After weeks with a production Fujifilm X-T5, Chris and Jordan have some final thoughts.
The EOS R6 II arrives in one of the most competitive parts of the market, facing off against some very capable competition. We think it rises to the challenge.
Above $2500 cameras tend to become increasingly specialized, making it difficult to select a 'best' option. We case our eye over the options costing more than $2500 but less than $4000, to find the best all-rounder.
There are a lot of photo/video cameras that have found a role as B-cameras on professional film productions or even A-cameras for amateur and independent productions. We've combed through the options and selected our two favorite cameras in this class.
What’s the best camera for around $2000? These capable cameras should be solid and well-built, have both the speed and focus to capture fast action and offer professional-level image quality. In this buying guide we’ve rounded up all the current interchangeable lens cameras costing around $2000 and recommended the best.
Family moments are precious and sometimes you want to capture that time spent with loved ones or friends in better quality than your phone can manage. We've selected a group of cameras that are easy to keep with you, and that can adapt to take photos wherever and whenever something memorable happens.
What's the best camera for shooting sports and action? Fast continuous shooting, reliable autofocus and great battery life are just three of the most important factors. In this buying guide we've rounded-up several great cameras for shooting sports and action, and recommended the best.