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Just tested my new Uzi for hot/dead pixels

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MW

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Just got an Uzi at Compusa.

I downloaded the dead/hot pixel test utility and ran it on pix taken with the lens cap on, at 1/2, 1, 2, 4 and 8 seconds.

At 1/2 second, I got 0 dead pixels, 8 hot pixels
At 1 second, I got 4 dead, 12 hot
At 2 seconds, I got 4 dead, 192 hot
At 4 seconds, I got 74 dead, 7804 hot
At 8 seconds, I got 3345 dead, 92476 hot

Think I should exchange it?

--Mitch
 
Update:

The hot pixels that show up at 1/2 second are clustered into two groups of 4.

Most of the ones that show up at slower shutter speeds are low in luminance.
MW said:
Just got an Uzi at Compusa.

I downloaded the dead/hot pixel test utility and ran it on pix
taken with the lens cap on, at 1/2, 1, 2, 4 and 8 seconds.

At 1/2 second, I got 0 dead pixels, 8 hot pixels
At 1 second, I got 4 dead, 12 hot
At 2 seconds, I got 4 dead, 192 hot
At 4 seconds, I got 74 dead, 7804 hot
At 8 seconds, I got 3345 dead, 92476 hot

Think I should exchange it?

--
Mitch
Click to expand...
--Mitch
 
that seam like a lot to me for the 8 seconds test and for the 4 seconds test, 7804? geeee...is that normal?
MW said:
Just got an Uzi at Compusa.

I downloaded the dead/hot pixel test utility and ran it on pix
taken with the lens cap on, at 1/2, 1, 2, 4 and 8 seconds.

At 1/2 second, I got 0 dead pixels, 8 hot pixels
At 1 second, I got 4 dead, 12 hot
At 2 seconds, I got 4 dead, 192 hot
At 4 seconds, I got 74 dead, 7804 hot
At 8 seconds, I got 3345 dead, 92476 hot

Think I should exchange it?

--
Mitch
Click to expand...
--Daniella http://www.pbase.com/zylenC7OO discussion group: http://www.homepet.com/cgi-bin/c700/UltraBoard.cgi 'The things you own will only endup owning you'
 
MW said:
The hot pixels that show up at 1/2 second are clustered into two
groups of 4.

Most of the ones that show up at slower shutter speeds are low in
luminance.
MW said:
Just got an Uzi at Compusa.

I downloaded the dead/hot pixel test utility and ran it on pix
taken with the lens cap on, at 1/2, 1, 2, 4 and 8 seconds.

At 1/2 second, I got 0 dead pixels, 8 hot pixels
At 1 second, I got 4 dead, 12 hot
At 2 seconds, I got 4 dead, 192 hot
At 4 seconds, I got 74 dead, 7804 hot
At 8 seconds, I got 3345 dead, 92476 hot

Think I should exchange it?

--
Mitch
Click to expand...
Click to expand...
This sounds awfully high.

What shutter speed did you use when you ran your test? What defaults did you set for dead and hot pixels? Do you see any dead pixels in any of your actual pictures at 1/2s or 1s?
MW said:
--
Click to expand...
 
The shutter speeds are as listed in my original post: 1/2 sec, 1 sec, 2 secs, 4 secs, and 8 secs.

The settings in the deadpixeltest software were the defaults: 60 and 250.

I don't see the dead pixels, but I can see the two clumps of hot pixels.

I am going to post the test pix on pbase. I'll post the URL shortly.

BTW, I really appreciate the people on the forum and their willingness to help others.

Mitch
bnewman said:
MW said:
The hot pixels that show up at 1/2 second are clustered into two
groups of 4.

Most of the ones that show up at slower shutter speeds are low in
luminance.
MW said:
Just got an Uzi at Compusa.

I downloaded the dead/hot pixel test utility and ran it on pix
taken with the lens cap on, at 1/2, 1, 2, 4 and 8 seconds.

At 1/2 second, I got 0 dead pixels, 8 hot pixels
At 1 second, I got 4 dead, 12 hot
At 2 seconds, I got 4 dead, 192 hot
At 4 seconds, I got 74 dead, 7804 hot
At 8 seconds, I got 3345 dead, 92476 hot

Think I should exchange it?

--
Mitch
Click to expand...
Click to expand...
This sounds awfully high.
What shutter speed did you use when you ran your test? What
defaults did you set for dead and hot pixels? Do you see any dead
pixels in any of your actual pictures at 1/2s or 1s?
bnewman said:
--
Click to expand...
Click to expand...
--Mitch
 
Not to dispute you abilities, but this sounds really high. I tested five cameras and never got dead pixels at any level -- even with settings of 30 for hot and 150 for dead. Make sure your lens cap is on tight, ISO is 100 and you are doing a TIFF format.
MW said:
Just got an Uzi at Compusa.

I downloaded the dead/hot pixel test utility and ran it on pix
taken with the lens cap on, at 1/2, 1, 2, 4 and 8 seconds.

At 1/2 second, I got 0 dead pixels, 8 hot pixels
At 1 second, I got 4 dead, 12 hot
At 2 seconds, I got 4 dead, 192 hot
At 4 seconds, I got 74 dead, 7804 hot
At 8 seconds, I got 3345 dead, 92476 hot

Think I should exchange it?

--
Mitch
Click to expand...
--New UZer Gadget (aka James)C-21OO
 
MW said:
The shutter speeds are as listed in my original post: 1/2 sec, 1
sec, 2 secs, 4 secs, and 8 secs.

The settings in the deadpixeltest software were the defaults: 60
and 250.
Click to expand...
Ooppsss sorry, I meant what ISO do you have the camera set to and what resolution. I would recommend shooting SHQ with ISO at 100.
MW said:
I don't see the dead pixels, but I can see the two clumps of hot
pixels.

I am going to post the test pix on pbase. I'll post the URL shortly.

BTW, I really appreciate the people on the forum and their
willingness to help others.

Mitch
bnewman said:
MW said:
The hot pixels that show up at 1/2 second are clustered into two
groups of 4.

Most of the ones that show up at slower shutter speeds are low in
luminance.
MW said:
Just got an Uzi at Compusa.

I downloaded the dead/hot pixel test utility and ran it on pix
taken with the lens cap on, at 1/2, 1, 2, 4 and 8 seconds.

At 1/2 second, I got 0 dead pixels, 8 hot pixels
At 1 second, I got 4 dead, 12 hot
At 2 seconds, I got 4 dead, 192 hot
At 4 seconds, I got 74 dead, 7804 hot
At 8 seconds, I got 3345 dead, 92476 hot

Think I should exchange it?

--
Mitch
Click to expand...
Click to expand...
This sounds awfully high.
What shutter speed did you use when you ran your test? What
defaults did you set for dead and hot pixels? Do you see any dead
pixels in any of your actual pictures at 1/2s or 1s?
MW said:
--
Click to expand...
Click to expand...
--
Mitch
Click to expand...
 
MW,

In my opinion - this should go to Olympus or to exchange. It happened. For the test you camera should be set to TIFF. But even for JPG the numbers are too high!!!!
Leo
MW said:
Just got an Uzi at Compusa.

I downloaded the dead/hot pixel test utility and ran it on pix
taken with the lens cap on, at 1/2, 1, 2, 4 and 8 seconds.

At 1/2 second, I got 0 dead pixels, 8 hot pixels
At 1 second, I got 4 dead, 12 hot
At 2 seconds, I got 4 dead, 192 hot
At 4 seconds, I got 74 dead, 7804 hot
At 8 seconds, I got 3345 dead, 92476 hot

Think I should exchange it?

--
Mitch
Click to expand...
 
Thanks for the hints on testing. I had used JPEG but I will re-run the test using TIFF and ISO 100. (I think I used ISO 100 but I'll make absolutely sure this time.)

I have posted the original shots at pbase:

http://www.pbase.com/mweitz/2100uz

The 8 second shot looks like July 4th fireworks, doesn't it?
Leo said:
MW said:
Just got an Uzi at Compusa.

I downloaded the dead/hot pixel test utility and ran it on pix
taken with the lens cap on, at 1/2, 1, 2, 4 and 8 seconds.

At 1/2 second, I got 0 dead pixels, 8 hot pixels
At 1 second, I got 4 dead, 12 hot
At 2 seconds, I got 4 dead, 192 hot
At 4 seconds, I got 74 dead, 7804 hot
At 8 seconds, I got 3345 dead, 92476 hot

Think I should exchange it?

--
Mitch
Click to expand...
Click to expand...
--Mitch
 
Thank goodness for the folks in this forum.

I redid the deadhotpixel tests in TIFF Mode using ISO 100, and the results were amazingly better:

At 1/2 second, there were NO hot pixels

At 2 seconds and 4 seconds, there were 8 hot pixels (two groups of four)

At 8 second, there were 16 hot pixels (four groups of four).

Since it will be very seldom that I use even 1/2 second as a shutter speed, I think this unit will be a keeper.

Does anyone disagree? If I exchanged it, would I likely get a better CCD?

mitch
MW said:
I have posted the original shots at pbase:

http://www.pbase.com/mweitz/2100uz

The 8 second shot looks like July 4th fireworks, doesn't it?
Leo said:
MW said:
Just got an Uzi at Compusa.

I downloaded the dead/hot pixel test utility and ran it on pix
taken with the lens cap on, at 1/2, 1, 2, 4 and 8 seconds.

At 1/2 second, I got 0 dead pixels, 8 hot pixels
At 1 second, I got 4 dead, 12 hot
At 2 seconds, I got 4 dead, 192 hot
At 4 seconds, I got 74 dead, 7804 hot
At 8 seconds, I got 3345 dead, 92476 hot

Think I should exchange it?

--
Mitch
Click to expand...
Click to expand...
--
Mitch
Click to expand...
--Mitch
 
I would always recommend trying an exchange if possible. Time at Oly means time away from you. Like I said, the results sound really high, so try to retest. CompUSA will exchange if they have others available.

For my test, I changed the defaults from 60/250 to 30/150. As I understand it, the dead value doesn't have to be changed. My understanding is that a luminance of under 60 is not that visible. Programs like Mediachance's HotPixel can handle pixels that are under 150. However, when you get above about 180, it's almost a lost cause if you are picky. Hope this helps.
MW said:
I have posted the original shots at pbase:

http://www.pbase.com/mweitz/2100uz

The 8 second shot looks like July 4th fireworks, doesn't it?
Leo said:
MW said:
Just got an Uzi at Compusa.

I downloaded the dead/hot pixel test utility and ran it on pix
taken with the lens cap on, at 1/2, 1, 2, 4 and 8 seconds.

At 1/2 second, I got 0 dead pixels, 8 hot pixels
At 1 second, I got 4 dead, 12 hot
At 2 seconds, I got 4 dead, 192 hot
At 4 seconds, I got 74 dead, 7804 hot
At 8 seconds, I got 3345 dead, 92476 hot

Think I should exchange it?

--
Mitch
Click to expand...
Click to expand...
--
Mitch
Click to expand...
--New UZer Gadget (aka James)C-21OO
 
No guarantees on getting a better one if you exchange. You already determined that you doubt you will use slower than 1/2 sec, so I wouldn't bother. I was being picky on mine only because of principle. I don't think I will ever go beyond 1/2 sec, but it bugged me that the camera would allow me to do 16 sec and produce bad pics. The fact is perfect cameras are rare, so determine what your minimum requirements are and stick with it. Sounds like you got the camera for you.
MW said:
I redid the deadhotpixel tests in TIFF Mode using ISO 100, and the
results were amazingly better:

At 1/2 second, there were NO hot pixels

At 2 seconds and 4 seconds, there were 8 hot pixels (two groups of
four)

At 8 second, there were 16 hot pixels (four groups of four).

Since it will be very seldom that I use even 1/2 second as a
shutter speed, I think this unit will be a keeper.

Does anyone disagree? If I exchanged it, would I likely get a
better CCD?

mitch
MW said:
I have posted the original shots at pbase:

http://www.pbase.com/mweitz/2100uz

The 8 second shot looks like July 4th fireworks, doesn't it?
Leo said:
MW said:
Just got an Uzi at Compusa.

I downloaded the dead/hot pixel test utility and ran it on pix
taken with the lens cap on, at 1/2, 1, 2, 4 and 8 seconds.

At 1/2 second, I got 0 dead pixels, 8 hot pixels
At 1 second, I got 4 dead, 12 hot
At 2 seconds, I got 4 dead, 192 hot
At 4 seconds, I got 74 dead, 7804 hot
At 8 seconds, I got 3345 dead, 92476 hot

Think I should exchange it?

--
Mitch
Click to expand...
Click to expand...
--
Mitch
Click to expand...
--
Mitch
Click to expand...
--New UZer Gadget (aka James)C-21OO
 
I posted the results after redoing the test with TIFF format and ISO 100, and they were much better.

In fact, on a 1/2 second exposure, there were no hot pixels even with a setting of 20/250.

On a 4 second exposure, there were 8 hot pixels at 60/250, none with a luminace as high as 180.
Gadget66 said:
For my test, I changed the defaults from 60/250 to 30/150. As I
understand it, the dead value doesn't have to be changed. My
understanding is that a luminance of under 60 is not that visible.
Programs like Mediachance's HotPixel can handle pixels that are
under 150. However, when you get above about 180, it's almost a
lost cause if you are picky. Hope this helps.
MW said:
I have posted the original shots at pbase:

http://www.pbase.com/mweitz/2100uz

The 8 second shot looks like July 4th fireworks, doesn't it?
Leo said:
MW said:
Just got an Uzi at Compusa.

I downloaded the dead/hot pixel test utility and ran it on pix
taken with the lens cap on, at 1/2, 1, 2, 4 and 8 seconds.

At 1/2 second, I got 0 dead pixels, 8 hot pixels
At 1 second, I got 4 dead, 12 hot
At 2 seconds, I got 4 dead, 192 hot
At 4 seconds, I got 74 dead, 7804 hot
At 8 seconds, I got 3345 dead, 92476 hot

Think I should exchange it?

--
Mitch
Click to expand...
Click to expand...
--
Mitch
Click to expand...
--
New UZer Gadget (aka James)
C-21OO
Click to expand...
--Mitch
 
Now that you have the settings correct, your readings are very good for a UZI. If you tried 10 different UZIs I doubt that you would find any better than yours.

Good Luck

Kerry
MW said:
I redid the deadhotpixel tests in TIFF Mode using ISO 100, and the
results were amazingly better:

At 1/2 second, there were NO hot pixels

At 2 seconds and 4 seconds, there were 8 hot pixels (two groups of
four)

At 8 second, there were 16 hot pixels (four groups of four).

Since it will be very seldom that I use even 1/2 second as a
shutter speed, I think this unit will be a keeper.

Does anyone disagree? If I exchanged it, would I likely get a
better CCD?

mitch
MW said:
I have posted the original shots at pbase:

http://www.pbase.com/mweitz/2100uz

The 8 second shot looks like July 4th fireworks, doesn't it?
Leo said:
MW said:
Just got an Uzi at Compusa.

I downloaded the dead/hot pixel test utility and ran it on pix
taken with the lens cap on, at 1/2, 1, 2, 4 and 8 seconds.

At 1/2 second, I got 0 dead pixels, 8 hot pixels
At 1 second, I got 4 dead, 12 hot
At 2 seconds, I got 4 dead, 192 hot
At 4 seconds, I got 74 dead, 7804 hot
At 8 seconds, I got 3345 dead, 92476 hot

Think I should exchange it?

--
Mitch
Click to expand...
Click to expand...
--
Mitch
Click to expand...
--
Mitch
Click to expand...
--Kerry
 
I hope that this does not get posted twice. I hit a button and oopss. If so, sorry.

Definitely do as DomDP suggests. Take several pictures at different shutter speeds. I would use ISO 100 and both SHQ and TIFF. The Starzen test gives you a general overview but I was really surprised when I tested two E100RSs. Camera a seemed to be the better camera when compared to camera b based on Starzen. However, when I looked at the pictures in my photo viewer and photo editing programs I couldn't believe the amount of noise/hot pixels in camera b at the slower speeds. Obviously they weren't luminescent enough to be counted using Starzen default settings but they were there. When I changed hot pixel number I was surprised at the huge jump in hot pixels with camera b and a very small increase with camera a. I do plan on taking low light pictures so this is a concern for me.

Check out the comparison photos I did to see what I mean. Don't think the amt. of noise/hot pixels shows up that well but it still should be fairly obvious. If you do take a look at these, check them out in original size..better detail.

Good luck.

http://www.pbase.com/avian/e100rs_comparisons
 
Looks like you got a keeper!
MW said:
I posted the results after redoing the test with TIFF format and
ISO 100, and they were much better.

In fact, on a 1/2 second exposure, there were no hot pixels even
with a setting of 20/250.

On a 4 second exposure, there were 8 hot pixels at 60/250, none
with a luminace as high as 180.--New UZer Gadget (aka James)C-21OO
Click to expand...
 
With the default of 60/250

1/2 = 0 dead, 4 hot
1 = 0,4
2 = 0,4
4 = 0,12
8 = 0,30
16 = 0,62

With your setting of 30/150

1/2 = 0,4
1 = 0,4
2 = 0,17
4 = 0,37
8 = 0,50
16 = 2,304

John M
 
Hi, tried doing a pixel test after reading this post, wondering if anyone could advice, new to digital cameras.

at settings of 30/150 ISO 100 tiff
for 1/30 sec 4 hot
1 sec 8 hot
2 sec 10 hot
4 sec 43 hot
8 sec 4727

at settings of 60/250
1 and 2 sec 4 hot
4 sec 10 hot
8 sec 99 hot

and one group of hot pixels is quite obvious in my night shots as a bright yellow dot.

any reccomendations? thanks!
Kerry- said:
Good Luck

Kerry
MW said:
I redid the deadhotpixel tests in TIFF Mode using ISO 100, and the
results were amazingly better:

At 1/2 second, there were NO hot pixels

At 2 seconds and 4 seconds, there were 8 hot pixels (two groups of
four)

At 8 second, there were 16 hot pixels (four groups of four).

Since it will be very seldom that I use even 1/2 second as a
shutter speed, I think this unit will be a keeper.

Does anyone disagree? If I exchanged it, would I likely get a
better CCD?

mitch
MW said:
I have posted the original shots at pbase:

http://www.pbase.com/mweitz/2100uz

The 8 second shot looks like July 4th fireworks, doesn't it?
Leo said:
MW said:
Just got an Uzi at Compusa.

I downloaded the dead/hot pixel test utility and ran it on pix
taken with the lens cap on, at 1/2, 1, 2, 4 and 8 seconds.

At 1/2 second, I got 0 dead pixels, 8 hot pixels
At 1 second, I got 4 dead, 12 hot
At 2 seconds, I got 4 dead, 192 hot
At 4 seconds, I got 74 dead, 7804 hot
At 8 seconds, I got 3345 dead, 92476 hot

Think I should exchange it?

--
Mitch
Click to expand...
Click to expand...
--
Mitch
Click to expand...
--
Mitch
Click to expand...
--
Kerry
Click to expand...
 
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