Discussion in 'photography, graphics & art' started by Robster970, Mar 4, 2006.
sent again to your email
Cheers man, I have a habit of deleting my PMs all at once!
They're not stars. They're burnt out pixels on your sensor. It's quite common on long exposures... If they were stars, there would be movement on them as well! Good shots though!
What would make them burn out, and how do I check my camera for it? Just do a long exposure like that?
Well I don't know the technical reason why they burn out, but it's quite well known with long exposures... I'm pretty sure it's only with then and not permanent.
I'm sure someone will find a tech reason and correct me if I'm talking bollocks though.
Edit: Just found something here! It's about burnt out pixels but it's not referring to long exposures/night shots!
"I suspect that the effect comes about when point sources of light saturate individual sensor pixels and the bayer interpretation software just can't handle it - or something like that "
you know it's still saying your box is full ????
Yeah? Tits! It doesn't matter, someone emailed me the details
Actually they seem to be referred to as "hot" pixels and there's a bit more info on this forum.
"I think the reason it's called a "hot" pixel is because the CCD heats up too much during the length of the exposure causing certain pixels to get stuck on a certain colour."
Sounds reasonable if not acceptable!
Hhmm, I was wondering why it doesn't appear on his other photos - if it is a software thing then I guess a firmware flash would sort it
you knob - that was me
It's a hardware thing. Garf's other shots are all smaller and I'd guess that's why you can't see it in the resized (smaller) .jpg he posted above the huge version! (Molto colour info goes missing when you downsize a jpeg doesn't it!)
Circumstances. At least it sort of demonstrates it's not fatal to camera sensors...
It's a bit like how you get dead pixels on LCD monitors. A few transistors are bound to go wrong. It's not caused by anything like overheating AFAIK - it's just an unavoidable fact that some of them stop working.
You can test for 'em by taking a shot (long exposure? edit: no, 1/160ish at ISO1600) with the lens cap on.
You can get rid of 'em by remapping the sensor. This is a function on Olympus cameras - even the shit P&Ses - but not on Canon or Nikons, which require warranty service.
here is my entry
taken on T-MAX3200, scanned and then upped the grain and tweaked the curves via Photoshop
a la dead man shoes
All taken with a handheld Nikon Coolpix2000, levels adjusted automatically via Photoshop.
i like that no1.
hey, cheeky boy, try this, straight outta da camera, should have entered it but couldn't find it, exposed the ruins using my flash and setting it of manually several times running around in different positions to eliminate shadows ( or in this case introducing multiple shadows from different directions)
who you callin boy!
fair play to ya.
contrary to what riotsky said I think there are some cracking entries, different but still good stuff.
Still good, just not as good methinks
Bump! I'll update the thumbnails tonight when all the entries are in... last day to enter etc.
Hello to you all. Have been looking at your excellent work and thought I would have a crack at the comp. I'm not tech savvy, so apols in advance if this does not work:
keep up all the good work....Hope you enjoy the pics.
Long time reader first time poster before anyone asks.
I have no problem with you entering the comp' despite you never posting on, I don't think you can enter if you haven't contributed to the forums before - correct me if I am wrong? LTRFTP or not
Any objections? I'm OK with him entering as he did register in 2005...
no 1 snow http://www.flickr.com/photos/83872455@N00/120910935/
no 2 cabin http://www.flickr.com/photos/83872455@N00/120910891/
no 3 shannon http://www.flickr.com/photos/83872455@N00/120910861/
Nice work on the thumbnails, thanks
1] Old skool - Ninjaboy
2] moon - blackadder
3] Entry 3 - Snadge
1st tron - danski
2nd Boom! - Riot Sky
3rd ambience - mauvais mangue
Very little to choose between the 3, Tron won it for me because of the film I think.
There are no rules about having needed to have posted first. I didn't agree with banning the last guy from entering, but that was more dodgy. I think we should let them enter. Just my own opinion...
He did register in 2005, so I`ll let him in, yeah?
Aye, I reckon. Got to start somewhere...
I'll vote tomorrow when I'm less knackered.
Separate names with a comma.