Camera issues?

[jtbo]

You photo guys, tell me your opinion if I should start to worry about. Sometimes when I take photo results are not quite what I have learned to except, I don't mean this shaked photo, but that there are some extra bright dots in pic.

I have circled them here and also there is one odd line that I have added red markings to both side of it, what are these things?
http://jtbo.pp.fi/images/Astro/hot_pixels.jpg

Sample:


Do I need to start saving to new camera already? D90 would be nice, but that is lot of money and I need to save for house repairs so I'm not too keen to spend at the moment, but then again I don't like to find out that all of sudden my pics are filled with akne...

[volvosneverdie]

its the secret plans for the zombie invasion dude.

prepare yourself.

[jtbo]

I eat zombies for breakfast, so that does not worry me, but camera issue is another story

[sven360]

Are you two regular mushroom pickers or just seasonal?

[jtbo]

Are you two regular mushroom pickers or just seasonal?

I don't like mush rooms, oval rooms are much better

[volvosneverdie]

Are you two regular mushroom pickers or just seasonal?

I don't like mush rooms, oval rooms are much better

You asked for this one Sven.......................................................

Leave us alone.
We're Fun-gi's !


(fun guys)

[Pie]

Are you two regular mushroom pickers or just seasonal?

I don't like mush rooms, oval rooms are much better

You asked for this one Sven.......................................................

Leave us alone.
We're Fun-gi's !


(fun guys)

And

[Chris_C]

Jani, do you have dark frame subtraction on that camera? It's in my menu as "noise reduction". Does it happen at all shutter speeds?

Do a few test frames, on a tripod, between 1/125 and 30 secs of a night scene, see if they appear on all of them.

[filthyjohn]

The V3M way! Quite a bit of nonsense, followed by a sensible, helpful reply. You don't get this service anywhere else.

[volvosneverdie]

The V3M way! Quite a bit of nonsense, followed by a sensible, helpful reply. You don't get this service anywhere else.

Youve obviously never used my 'will answer any question for a pound' text service.

Its similar.
So similar i may be in breach of my own copyrights.

[jtbo]

Jani, do you have dark frame subtraction on that camera? It's in my menu as "noise reduction". Does it happen at all shutter speeds?

Do a few test frames, on a tripod, between 1/125 and 30 secs of a night scene, see if they appear on all of them.

I have it off as that is required for astro shooting, That blue thing comes in even that is on, don't know about other errors.

[Chris_C]

I have it off as that is required for astro shooting

Why? This surprises me, DSLR's are known for noise.... ah, do stars appear to small and get confused for hot pixels and therefore get nuked?

The fact that that blue bar stays there I can't get my head round yet... it *looks* like a row lost due to a dodgy contact on an LCD screen which isn't a good thing but I know nothing about CCD's. Worth an ask on some astrophotog forums?

[volvosneverdie]

I have it off

This amuses me.

[jtbo]

I have it off as that is required for astro shooting

Why? This surprises me, DSLR's are known for noise.... ah, do stars appear to small and get confused for hot pixels and therefore get nuked?

The fact that that blue bar stays there I can't get my head round yet... it *looks* like a row lost due to a dodgy contact on an LCD screen which isn't a good thing but I know nothing about CCD's. Worth an ask on some astrophotog forums?

Astro photos enter to software process which has much more advanced dark frame substraction than camera has so that is main reason. Typically in astrophotography you take several photos, also ton of dark frames and process them all together in special software like Registax 5 or Deep Space Stacker.

Only reason I'm worried is that there has been more and more of them and also some dead pixels on daytime photos where I have not seen them before.