Abnormally many hot pixels?

[Acieed]

Hi all!

I just got my C720UZ last friday from AP. Tried some long exposure shots lately and found many hot pixels all over the
pics. Seems to get them for any shots > 1s.

Is it a defect? Or just normal for the C720UZ?

Please help!

TIA.

iso 100, 6.0s, f/2.8, 40mm

iso 100, 6.0s, f/3.2, 61mm

 

[Wolfgang]

6 sec exposure?

Well, for an Olympus, thats normal i reckon...

However, help is @ hand.

Refer to this
thread

Hope it helps!

 

[Acieed]

Cool, thanks! The linked thread helped alot

For a moment, I thought the hot pixel were way too many, considering people complaining even for a few hot pixels in their pics

 

[mpenza]

there sure is lots of hot pixels!?!?!?

 

[izux]

Originally posted by Acieed
Cool, thanks! The linked thread helped alot

For a moment, I thought the hot pixel were way too many, considering people complaining even for a few hot pixels in their pics

I think the hot pixels in your photographs are really way too many...

 

[Acieed]

ooh, really eh? I thought so too.

Perhaps someone with a C-720 or 700 can post a unedited sample too? Just to compare the difference. I start getting obvious hot pixels beyond ~2" and increase as its gets longer.

Just e-mailed Olympus and got a quick phone call within one day, said I can bring it down for a check.

 

[nicekit]

what is hot pixel btw?

what makes it appear>?

 

[Wolfgang]

Originally posted by Acieed
ooh, really eh? I thought so too.

Perhaps someone with a C-720 or 700 can post a unedited sample too? Just to compare the difference. I start getting obvious hot pixels beyond ~2" and increase as its gets longer.

Just e-mailed Olympus and got a quick phone call within one day, said I can bring it down for a check.

Hi.

Night shots with C700 is quite possible, provided you let it rest between shots and try not to use the LCD so much to preview...

In fact, do a search for "Tweek" in Clubsnap or took a look @ his galleries for C700. He has very nice ones, noise free.

Here is one of my night shot with my C700Uz.

It's abit troublesome but i took 1 shot then then turned it off, and chatted with my friend who was tagging along and after about 5 mins, took another shot.

But the main thing you have to do is you need to be very familiar and comfortable with the C700 so you can go about adjusting the settings in minimum time after the camera finishes "booting up", so that you take that shot in the fastest possible, giving yourself more time to compose the shot.

While you allow the camera to rest, maybe you can try to think of another perspective for taking the shot.

PS: Have the quick release plate mounted on your camera first as well, so you can mount it upon the tripod fast.

 

[Acieed]

Thanks guys for all the tips and info. I went down to Olympus today, guy there tried to convince me that its perfectly normal, but nonetheless, did some adjustments for my CCD (took 30mins). :dunno:

I did a brief test on some long exposure shots >2s, appears to be better now. Will try on some night shots soon.

 

[darkness]

If you are using Photoshop as your image editor, try doing a median filtering to get rid of your hot pixels. You won't need 3rd party software or shoot a dark frame. The quality of the filtering is up to you to decide if it's acceptable or not.

As an example, I use a median filter on your second image. The result:

All the hot pixels have been removed, but there is loss of details in the "light stick".