Originally posted by awscreo But I just can't let go when people accuse me of nonsense.
On my K1, with the D-FA28-105, testing shows that if 100% is total blur:
- shutter shock (1) accounts for approx. third of the blur
- approx. another third of the total blur is related to mirror kick (2)
- and another third is related to camera and lens motions (3) at shutter speeds slower or equal to the FL reciprocal.
That's why when using an heavier lenses such as the 15-30, 24-70 or 70-200 the amount of blur from (2) and (3) diminishes, (1) remains the smallest contributor.
When small lenses are used (2) and (3) become more prominent is what people confuse with (1: shutter shock).
It is important to distinguish the 3 causes of pixel blur in order to use camera setup and settings for optimal sharpness.
A photographer who aimed at blowing prints to XXL sizes 24"x36" may have interest to optimize his camera setup for optimal sharpness, or simple use a tripod and enable EFCS.
The Pentax K1 and K1 II offer increasing levels of exposures for optimal sharpness:
- normal mode
- normal mode with remote
- mirror lockup
- mirror lockup with remote
- 2 sec. timer (will close the lens aperture,
then waiting 2 sec. before exposing the sensor)
- 2 sec. timer with remote (will close the lens aperture,
then waiting 2 sec. before exposing the sensor)
- 2 sec. timer with SR (will close the lens aperture, keep the sensor stationary, waiting for 2 sec. , exposure the sensor while still maintaining the sensor in stationary position)
- 2 sec. timer with SR with remote (will close the lens aperture, keep the sensor stationary, waiting for 2 sec. , exposure the sensor while still maintaining the sensor in stationary position)
- 10 sec. timer w/o remote (will count 10 sec., keep the sensor stationary,
then close the lens aperture and expose)
- 10 sec. timer with SR w/o remote (will count 10 sec., keep the sensor stationary,
then close the lens aperture and expose)
- EFCS in LV mode
- EFCS in LV mode with 2 sec. delay
- EFCS in LV mode with 2 sec. delay and remote
- Pixel shift resolution in normal mode
- Pixel shift resolution in LV mode
- Pixel shift resolution in LV mode with 2 sec. delay (will close the lens aperture, count 2 sec. ,
then 4 x shifted exposures)
- Pixel shift resolution in LV mode with 2 sec. delay and remote (will close the lens aperture, count 2 sec. ,
then 4 x shifted exposures)
This is plenty of choice for getting the sharp images when optimal sharpness is a must have.
When I want best sharpness without PS, my favorite choice is: Tripod, wait a bit if the terrain in muddy, camera set EFCS enabled in Live view, 2 sec. timer, IR remote controlled., lens aperture f.5.6 => f11.
When I don't have a tripod, there is risk of subject motion or I want to use the OVF and still want the best sharpness, I enable 2 sec. timer, enable PS MC, RAW, shoot hand-held. In post, I disable PS MC => I get 1 frame captured electronically only. Do this.