D90 hot pixel galore!

[dingydongy]

Hi all,

I took some pics at iso 3200 at 1/4s exposures and to my horror, saw many hot pixels all over the picture. Did some reading online and found out that many people had this experience, but with longer exposures.

Any D90 users here face the same problem? I understand that it is normal with long exposures of more than 2s, but 1/4s is so short and i'm having these hot red blue pixels showing up.

Advice please, tks!

[Madmax]

Is your long exposure NR on or off? If it is on, you should not have the noise.

[yapel]

Can please post some samples to share here?

[dingydongy]

ok will try to upload samples tonight..
The long exposure NR doesn't kick in at 1/4s exposures so can still see the hot pixels...

[Madmax]

What are you shooting at ISO3200 and 1/4 s anyway?

[Daedalus Trent]

Originally Posted by Madmax What are you shooting at ISO3200 and 1/4 s anyway?

haha, yea, curious to know too

[2100]

In a dimmed hotel/restaurant banquet room, 10-12mm, can shoot 1-2 to 1/4s f4 handheld at ISO1600. (if i had beer / wine then need support lar haha). No issue on D70!

[2100]

Can shoot the light streams of waiter/waitress steaming in during first march in, with the cold dish lit by flashing LEDs or candlelight.
1s, f4, 10-12mm ISO1600, handheld.

[swiftee]

Is normal to have some hot pixel on CCD. Just relax...

[cityzensg]

Originally Posted by swiftee Is normal to have some hot pixel on CCD. Just relax...

D90 I tot is CMOS?

[yasgiro]

sigh

TS not the only one with this problem. just bought mine and after some test under average lightings and no flash, i get to see one constant extreme hot pixel. there are few more but less obvious which i can accept.

friendly store promise 1-1 exchange after the holiday but i begin to feel that its inferior quality possibly because all made in thailand now?

[Daedalus Trent]

Originally Posted by yasgiro but i begin to feel that its inferior quality possibly because all made in thailand now?

uhh... doubt that.

[pisduck]

Originally Posted by yasgiro sigh TS not the only one with this problem. just bought mine and after some test under average lightings and no flash, i get to see one constant extreme hot pixel. there are few more but less obvious which i can accept. friendly store promise 1-1 exchange after the holiday but i begin to feel that its inferior quality possibly because all made in thailand now?

my D700 also has one hot pixel. I can't be bothered to bring it for exchange. I feel sure has hot pixel sooner or later.

BTW, if you develop in ACR, the hot pixel will disappear automatically.

BTW, if you are anal about hot pixel, you can try olympus DSLRs. The DSLRs comes with a mapping function to remove hot pixels. Very convenient. I think minolta used to have it too when I had the KM7D. not sure about sony DSLRs now though.

[yasgiro]

Thanks mate for the info.

at least now i know its a common issue for dlsr to have hot pixel. will prob go for the 1-1 exchange and forget about it in future.

cheers

Originally Posted by pisduck my D700 also has one hot pixel. I can't be bothered to bring it for exchange. I feel sure has hot pixel sooner or later. BTW, if you develop in ACR, the hot pixel will disappear automatically. BTW, if you are anal about hot pixel, you can try olympus DSLRs. The DSLRs comes with a mapping function to remove hot pixels. Very convenient. I think minolta used to have it too when I had the KM7D. not sure about sony DSLRs now though.

[pisduck]

Originally Posted by yasgiro Thanks mate for the info. at least now i know its a common issue for dlsr to have hot pixel. will prob go for the 1-1 exchange and forget about it in future. cheers

hey can u report back and see whether there are many/any sets with ZERO hot pixels?

I am kind of curious what is the distribution like too.

[qweasd]

alrite. i'll go down once replacement sets are available.
from there, will see if hot pixels are still existing

cheers

[HaimE]

Originally Posted by qweasd alrite. i'll go down once replacement sets are available. from there, will see if hot pixels are still existing cheers

Ok this makes me worry. I re-check carefully few of my night long exposures. Did few yesterday with various settings.. I did try iso 3200/F22/Shutter 30secs one more knob to bulb. why so low aperture?? like i say .. testing it out..

Thank god.. I dont see any hot pixels.....

[pisduck]

Originally Posted by HaimE Ok this makes me worry. I re-check carefully few of my night long exposures. Did few yesterday with various settings.. I did try iso 3200/F22/Shutter 30secs one more knob to bulb. why so low aperture?? like i say .. testing it out.. Thank god.. I dont see any hot pixels.....

that is the wrong way to do it. Nikon I think applied dark frame subtraction for exposure longer than 1/2sec (at least for the D700). So u must try ISO3200 and maybe 1/10 shutter speed. Just shoot with the lens cap on. I bet u will see some hot pixels.

[wangyl]

send it in to NSC. they'll defrag the sensor. after that it'll be fine i've never seen a hot pixel ever since. worked for my d60, should work on d90 too.

[krion]

Originally Posted by pisduck that is the wrong way to do it. Nikon I think applied dark frame subtraction for exposure longer than 1/2sec (at least for the D700). So u must try ISO3200 and maybe 1/10 shutter speed. Just shoot with the lens cap on. I bet u will see some hot pixels.

True. I noticed some hot pixels on a picture I took at ISO 3200, 1/3 sec exposure at F/5.6 which didn't show up on "hot pixel tests" done with exposures longer than 1 sec.