image problems with long shutter on Finepix

[michhy]

Hi,
I'm seeing lots of white dots in long exposure shots from my S5600 Finepix. It only happens when the shutter is set to 10seconds or longer. The white dots appear to be random all over the image. I was shooting some night scenes when I noticed "stars" in the night sky, only to be shocked to realize they are not stars but specs, which appears even on the ground and all over the photos. Each white dot is sized at around 1 pixel.

I tried taking a 10 seconds photo with the lense cover on, but there are no white dots in it, only complete dark image. but this isnt accurate coz maybe the camera cannot focus?

Please can anyone tell me what's wrong?
Thanks

[megascriler]

They are hot pixels, just noise. Maybe you can post a picture to show us?

[michhy]

Here you go...
see the white dots all over the photo? these are 100% crops from a 5mp image.
so is there a problem with my camera?

[bpribadi]

Originally Posted by michhy Here you go... see the white dots all over the photo? these are 100% crops from a 5mp image. so is there a problem with my camera?

Cannot see the EXIF data on your pic. But I think it is ok for long shutter, since there is no white dots when you close the lens, looks like there is no defect on your CCD.

Never analyzed mine though

[ultrazoom]

Show us the 100% crops from the same position.

Fuji's hot pixels are white.

[michhy]

Originally Posted by ultrazoom Show us the 100% crops from the same position. Fuji's hot pixels are white.

Here you go. Not precisely same pixel crop, but its cropped at the same the top-left corner of the photos. And yes, they are 100% crops. It appears the white dots are at random? What about the S9500 camera, do you have the same problem? Since they share the same CCD... any ideas? If this is normal, then I would skip going to Fuji since its pretty far from where I am thanks all.







Thanks

[ultrazoom]

Somehow, I could see the white pixels even in those you supposedly took with lens cover, different from what you initially claimed.

These are confirmed to be hot pixels. You might want to call Fuji up and check with them.

Somehow, I do have these as well on my F11 with long exposure.

[michhy]

Originally Posted by ultrazoom Somehow, I could see the white pixels even in those you supposedly took with lens cover, different from what you initially claimed. These are confirmed to be hot pixels. You might want to call Fuji up and check with them. Somehow, I do have these as well on my F11 with long exposure.

No, all of those photos above are taken WITHOUT the lense cover. The test shot with the lense cover does not have the white dots, but I didnt post it here. The 2 darker photos are taken with different ISO (ISO200). The brightest of the pics are taken at ISO800.

Hot pixels... so many???

Does your F11 has so much white dots? Can you post some up for me to see? thanks

[michhy]

Here is the reply from Fuji....

"Using shutter speed of 5 sec or longer will heat up the photo-sensor
and this heat emission might be picked up the neighbouring photo-sensor
which result in a bright spot (hot pixel) on the picture taken
(especially in dark area). Hence, there is no problem with your camera."

[megascriler]

Anyway the S9500 and S5200 don't use same sensor. Well, I guess such hot pixels can't be helped if Fuji didn't bother to implement a decent hot pixel reduction software. Then again the pictures don't look too bad.

Maybe Fujifilm will introduce the S6000 next year with the 6MP sensor for the F11 with a 12X zoom lens.

[michhy]

Originally Posted by megascriler Maybe Fujifilm will introduce the S6000 next year with the 6MP sensor for the F11 with a 12X zoom lens.

For that kinda zoom range, I think it would hit 400mm, so I think if they must do it on the F11 size, they would have to put it horizontally inside the camera!