afm901 wrote:
Excuse me, but you guys are making a case that pixel density effects the motion blur across a sensor. That is simply impossible. The motion blur is going to be in both images. Motion blur does not stay inside pixel boundaries. At least not in real world images. Any D700 image that is acceptably sharp will be just as acceptably sharp using the D800 if printed to the same size and resolution and viewed from the same distance.
Scott
Hi Scott
Not at all. I agree, on the same size sensor, the created vibration/motion blur would be the same independent of pixel density. All the discussion was saying is that when the motion/vibration blur keeps reducing down into the range of the resolution of the sensor, there ends up being a shift where the sensor resolution becomes dominant. And it becomes dominant first with a lower resolution sensors.
The pair of image columns below simulates this transition at 200% view. The image on the right is 2X the resolution of the images on the left. The same vibration/motion blur was added to both images (the math is correct). As you go down the image pairs, the vibration/image blur was reduced by 30% each step.
This shows as you move down you transitions from
1) At the top sets of images vibration/motion reduction helps images from both sensors
2) As you move down the image pairs vibration/motion reduction improves the 2X sensor more than the 1X sensor
3) Near the bottom of the image pairs, vibration/motion reduction improvement becomes nearly imperceptible for images from either sensor because we have already reached the sensor resolution limitations.
The amount of vibration/motion blur is the same in both. You just see continued improvement further down with the 2X resolution sensor because the sensor resolution limit is not reached as quickly.
The image example simulates 100 pixel width of the 1X sensor and 200 pixel width of a 2X sensor both blown up to a 30 inch print viewed at 10 inches. That size would be around 2/3 of an inch. To simulate what that would look like on your monitor, you would need to view this image at about 60 inches (assumes your display is around 95 dpi which is common for 20inche or larger monitors)
Sorry in advance for the large image
Hope this clarifies what was being said
ADDED NOTE: You may have to click on image to get it to the correct magnification
afm901 wrote:
Excuse me, but you guys are making a case that pixel density effects the motion blur across a sensor. That is simply impossible. The motion blur is going to be in both images. Motion blur does not stay inside pixel boundaries. At least not in real world images. Any D700 image that is acceptably sharp will be just as acceptably sharp using the D800 if printed to the same size and resolution and viewed from the same distance.
Scott
Hi Scott
Not at all. I agree, on the same size sensor, the created vibration/motion blur would be the same independent of pixel density. All the discussion was saying is that when the motion/vibration blur keeps reducing down into the range of the resolution of the sensor, there ends up being a shift where the sensor resolution becomes dominant. And it becomes dominant first with a lower resolution sensors.
The pair of image columns below simulates this transition at 200% view. The image on the right is 2X the resolution of the images on the left. The same vibration/motion blur was added to both images (the math is correct). As you go down the image pairs, the vibration/image blur was reduced by 30% each step.
This shows as you move down you transitions from
1) At the top sets of images vibration/motion reduction helps images from both sensors
2) As you move down the image pairs vibration/motion reduction improves the 2X sensor more than the 1X sensor
3) Near the bottom of the image pairs, vibration/motion reduction improvement becomes nearly imperceptible for images from either sensor because we have already reached the sensor resolution limitations.
The amount of vibration/motion blur is the same in both. You just see continued improvement further down with the 2X resolution sensor because the sensor resolution limit is not reached as quickly.
The image example simulates 100 pixel width of the 1X sensor and 200 pixel width of a 2X sensor both blown up to a 30 inch print viewed at 10 inches. That size would be around 2/3 of an inch. To simulate what that would look like on your monitor, you would need to view this image at about 60 inches (assumes your display is around 95 dpi which is common for 20inche or larger monitors)
Sorry in advance for the large image
Hope this clarifies what was being said
afm901 wrote:
Excuse me, but you guys are making a case that pixel density effects the motion blur across a sensor. That is simply impossible. The motion blur is going to be in both images. Motion blur does not stay inside pixel boundaries. At least not in real world images. Any D700 image that is acceptably sharp will be just as acceptably sharp using the D800 if printed to the same size and resolution and viewed from the same distance.
Scott
Hi Scott
Not at all. I agree, on the same size sensor, the created vibration/motion blur would be the same independent of pixel density. All the discussion was saying is that when the motion/vibration blur keeps reducing down into the range of the resolution of the sensor, there ends up being a shift where the sensor resolution becomes dominant. And it becomes dominant first with a lower resolution sensors.
The pair of image columns below simulates this transition at 200% view. The image on the right is 2X the resolution of the images on the left. The same vibration/motion blur was added to both images (the math is correct). As you go down the image pairs, the vibration/image blur was reduced by 30% each step.
This shows as you move down you transitions from
1) At the top sets of images vibration/motion reduction helps images from both sensors
2) As you move down the image pairs vibration/motion reduction improves the 2X sensor more than the 1X sensor
3) Near the bottom of the image pairs, vibration/motion reduction improvement becomes nearly imperceptible for images from either sensor because we have already reached the sensor resolution limitations.
The amount of vibration/motion blur is the same in both. You just see continued improvement further down with the 2X resolution sensor because the sensor resolution limit is not reached as quickly.
The image example simulates 100 pixel width of the 1X sensor and 200 pixel width of a 2X sensor both blown up to a 30 inch print viewed at 10 inches. That size would be around 2/3 of an inch. To simulate what that would look like on your monitor, you would need to view this image at about 60 inches (assumes your display is around 95 dpi which is common for 20inche or larger monitors)
Sorry in advance for the large image
Hope this clarifies what was being said
Feb 18, 2012 at 07:36 PM
Previous versions of John Wheeler's message #10358005 « D800 requires very specific technique? »
