Dust visible at f/36

I just tried a shot at f/36 with the D70 & it looks like someone
splattered mud on my lens. Is that sensor dust? It is invisible at
reasonable f-stops. Here is a 100% crop:
http://www.edgehill.net/1/?SC=go.php&DIR=California/Bay-Area/San-Francisco/2005-01-19-view/f-stop-test&PG=1&PIC=2
That's bad! This is just a tiny bit of the image & they are solid black.

Or is that gunk on the end of the lens in focus due to the greater depth
of field? I can see a big fleck of shiny something about 1/2-inch inside
the front, I tried dusting off the sensor gently & removing the filter
from the front & dusting that with canned air. The blobs remained in
position. I know my house is very dusty & I also shoot out in the woods,
etc.

"paul" wrote in message
...
I just tried a shot at f/36 with the D70 & it looks like someone splattered
mud on my lens. Is that sensor dust? It is invisible at reasonable f-stops.
Here is a 100% crop:
http://www.edgehill.net/1/?SC=go.php&DIR=California/Bay-Area/San-Francisco/2005-01-19-view/f-stop-test&PG=1&PIC=2
That's bad! This is just a tiny bit of the image & they are solid black.

Or is that gunk on the end of the lens in focus due to the greater depth
of field? I can see a big fleck of shiny something about 1/2-inch inside
the front, I tried dusting off the sensor gently & removing the filter
from the front & dusting that with canned air. The blobs remained in
position. I know my house is very dusty & I also shoot out in the woods,
etc.

Those are UFOs.

"paul" wrote in message
...
I just tried a shot at f/36 with the D70 & it looks like someone splattered
mud on my lens. Is that sensor dust? It is invisible at reasonable f-stops.
Here is a 100% crop:
http://www.edgehill.net/1/?SC=go.php&DIR=California/Bay-Area/San-Francisco/2005-01-19-view/f-stop-test&PG=1&PIC=2
That's bad! This is just a tiny bit of the image & they are solid black.

Or is that gunk on the end of the lens in focus due to the greater depth
of field? I can see a big fleck of shiny something about 1/2-inch inside
the front, I tried dusting off the sensor gently & removing the filter
from the front & dusting that with canned air. The blobs remained in
position. I know my house is very dusty & I also shoot out in the woods,
etc.
**** man the quality sucks!!!!

"paul" wrote in message
...
I just tried a shot at f/36 with the D70 & it looks like someone
splattered mud on my lens. Is that sensor dust?
It is invisible at reasonable f-stops. Here is a 100% crop:
http://www.edgehill.net/1/?SC=go.php&DIR=California/Bay-Area/San-Francisco/2005-01-19-view/f-stop-test&PG=1&PIC=2

It's sensor dust.

Bart

"paul" wrote in message
...
I just tried a shot at f/36 with the D70 & it looks like someone
splattered mud on my lens. Is that sensor dust? It is invisible at
reasonable f-stops. Here is a 100% crop:

http://www.edgehill.net/1/?SC=go.php...San-Francisco/
2005-01-19-view/f-stop-test&PG=1&PIC=2
That's bad! This is just a tiny bit of the image & they are solid black.

Or is that gunk on the end of the lens in focus due to the greater depth
of field? I can see a big fleck of shiny something about 1/2-inch inside
the front, I tried dusting off the sensor gently & removing the filter
from the front & dusting that with canned air. The blobs remained in
position. I know my house is very dusty & I also shoot out in the woods,
etc.

Use the rocket bulb blower. It worked for me on the 20D.

Rather horrible, isn't it?

Bart van der Wolf wrote:


"paul" wrote in message
...

I just tried a shot at f/36 with the D70 & it looks like someone
splattered mud on my lens. Is that sensor dust?
It is invisible at reasonable f-stops. Here is a 100% crop:
http://www.edgehill.net/1/?SC=go.php&DIR=California/Bay-Area/San-Francisco/2005-01-19-view/f-stop-test&PG=1&PIC=2



It's sensor dust.


Yeah I guess so. I just tried a little shot of air with the mirror
lock-up this time (doh) & lost some of them but will have to get a
proper cleaning kit or technique.

Strange the way they are only visible at such a crazy f-stop. Just
hideous though!

"paul" wrote in message
...
Bart van der Wolf wrote:


"paul" wrote in message
...

I just tried a shot at f/36 with the D70 & it looks like someone
splattered mud on my lens. Is that sensor dust?
It is invisible at reasonable f-stops. Here is a 100% crop:
http://www.edgehill.net/1/?SC=go.php&DIR=California/Bay-Area/San-Francisco/2005-01-19-view/f-stop-test&PG=1&PIC=2


It's sensor dust.


Yeah I guess so. I just tried a little shot of air with the mirror
lock-up this time (doh) & lost some of them but will have to get a
proper cleaning kit or technique.

Yes, the better ones a
http://www.visibledust.com/sensorbrush.htm (it really works, I can say
from experience), and
http://www.pbase.com/copperhill/ccd_cleaning for the really stubborn
stuff.

Strange the way they are only visible at such a crazy f-stop. Just
hideous though!

At those narrow apertures, the cone of light that's focused on the
sensor's pixels is very narrow, which tends to produce sharp/harsh
shadows.

Bart

**** man the quality sucks!!!!

Long distances combined with haze and smog will tend to do that.

steve

How did you lock the mirror up? I thought the D70 didn't have mirror
lockup?