What is an 'optimal' resolution?

Started May 16, 2012 | Discussions thread
boggis the cat
Veteran MemberPosts: 6,284Gear list
What if you factor in blur from camera movement
In reply to Knight Palm, May 23, 2012

Knight Palm wrote:

Diffraction is not like entering a brick wall.

Actually the resulting resolution is what counts and is a convolution of both the lens resolution and the sensor resolution.

Yes -- and also, in most cases, the movement of the camera; both gross movement from e.g. hand-held use, and both internal and external vibration.

So by increasing the pixel counts of the sensor, the sensor resolution increases, and the total image quality is hence increased.

Provided all else holds equal (or improves).

It might actually be easier to improve the final image quality by increasing the sensor resolution, rather than perfecting the optics!

That would depend on how good / bad the optics were in comparison to the pixel count (and other sensor attributes).

In other words, the classical HG/SHG lenses will deliver better and better image quality, for each new higher resolution sensors reaching it's sweet spot. The telecentric nature of those HG/SHG lenses is an important parameter in achieving this progress as well, while the individual pixel pitch shrinks.

It is always a diminishing return, though, and once you pass the design threshold of the optics you just get a better resolved blur.

The IS system is also important to factor in for hand-held shooting, and vibration damping for tripod mounted. Higher pixel density will also yield more susceptibility to detectable blur in the final image when viewed at 100% (or less sharpness / detail).

As an aside, I wonder if the constant IBIS system in the E-M5 will cause appreciable vibration. The final results are what is important, of course, but I wonder if a steady tripod-mounted shot with IBIS nominally "off" would produce a less sharp result than if a traditional IBIS system (where "off" is actually off) were used.

 boggis the cat's gear list:boggis the cat's gear list
Olympus E-5 Olympus E-M1 Olympus Zuiko Digital ED 12-60mm 1:2.8-4.0 SWD Olympus Zuiko Digital ED 50-200mm 1:2.8-3.5 SWD Olympus 12-40mm F2.8 +10 more
Reply   Reply with quote   Complain
Post (hide subjects)Posted by
(unknown member)
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark post MMy threads
Color scheme? Blue / Yellow