henryberkins Posted February 23, 2007 Share Posted February 23, 2007 here we go again....... ok soo, was out shooting today with my hassy, D50 as a light meter. the usual setup for something to happen to the sensor. of course. so i dunno, but the photogods were in my favour today and granted me sharp digital images. hopefully the 6x6's turned out the same. but i got white spots(like white dust) in the sky.. anyone know what they are? blown pixels? yuck, time for a new camera? thanks *sigh* chris Link to comment Share on other sites More sharing options...
William Kahn Posted February 23, 2007 Share Posted February 23, 2007 Arrrghhh! Dust bunnies! Time to clean the sensor..... Link to comment Share on other sites More sharing options...
henryberkins Posted February 23, 2007 Author Share Posted February 23, 2007 is the white dots dust? i knew the black stuff was, but i didnt know it could be white. Link to comment Share on other sites More sharing options...
William Kahn Posted February 23, 2007 Share Posted February 23, 2007 Dust always generates white spots. You're getting black spots, too? Link to comment Share on other sites More sharing options...
henryberkins Posted February 23, 2007 Author Share Posted February 23, 2007 yah, here<div></div> Link to comment Share on other sites More sharing options...
alan_olander1664878205 Posted February 23, 2007 Share Posted February 23, 2007 "Dust always generates white spots." Not true. When printing with a negative and enlarger, yes. Link to comment Share on other sites More sharing options...
Ed_Ingold Posted February 23, 2007 Share Posted February 23, 2007 Chris, The spots in the uncropped image are consistent with dust on the sensor. Dust will always leave dark spots, since the digital image is positive. It's hard to say what caused the white spots. That would occur if there were dust on a negative which was scanned. This is not consistent with your claim this is a digital image, unless the image is inverted. Bad pixels are sharply defined, not irregular like the spots shown. Link to comment Share on other sites More sharing options...
William Kahn Posted February 24, 2007 Share Posted February 24, 2007 Sorry, Chris, I knew it was digital, but was thinking scanned negative. Link to comment Share on other sites More sharing options...
henryberkins Posted February 24, 2007 Author Share Posted February 24, 2007 there are a number of them in the sky, like ALOT of tiny white spots, hardly noticable, and they vary from picture to picture, unlike dust which is constant. very stange Link to comment Share on other sites More sharing options...
dave_reichert1 Posted February 24, 2007 Share Posted February 24, 2007 Can you clarify? You're seeing white spots AND black spots on the same frame, taken with a digital camera? Link to comment Share on other sites More sharing options...
henryberkins Posted February 24, 2007 Author Share Posted February 24, 2007 yes, there are some large black spots, obviously dust, and tiny white spots spattered all over the sky. ill include a photo. also the white flecks are inconsistent, being in different places in different images. which rules out dust because it stays in the same place. poor D50, think i just pushed it too hard, time for a pro model. Link to comment Share on other sites More sharing options...
henryberkins Posted February 24, 2007 Author Share Posted February 24, 2007 and yes, taken with a nikon D50. Link to comment Share on other sites More sharing options...
henryberkins Posted February 24, 2007 Author Share Posted February 24, 2007 oh, just read my question over, sorry, it sounds like theree were white dots on the 6x6's, no it was on the D50 digital images, i take my shot on the hassy, then i take a digital shot so i can post it on my website/send to friends. Link to comment Share on other sites More sharing options...
dave_reichert1 Posted February 24, 2007 Share Posted February 24, 2007 I don't think they're blown or stuck pixels. They look more like some sort of JPEG compression artifacts. What was your ISO, and at what quality level were they shot? Also, did you do any post processing? If so, what? Link to comment Share on other sites More sharing options...
henryberkins Posted February 24, 2007 Author Share Posted February 24, 2007 iso 200, RAW+jpg fine, dont do any post processing, other than the odd crop, but not in this case, i like having maximum IQ. Link to comment Share on other sites More sharing options...
henryberkins Posted February 24, 2007 Author Share Posted February 24, 2007 sorry, meant to say RAW+jpg basic, you guys got the jpg basic, just checked the RAW file, yes, the same white spots. dunno if that helps. this was a backlit scene, was using one of nikons worst zooms(bear with me, on a student budget, dont have money for fancy equipment) maybe that had something to do with it? maybe some sort of weird flare? Link to comment Share on other sites More sharing options...
phule Posted February 24, 2007 Share Posted February 24, 2007 How long was the exposure? Link to comment Share on other sites More sharing options...
dave_reichert1 Posted February 24, 2007 Share Posted February 24, 2007 "How long was the exposure?" Fast enough to freeze wind-borne sand? Link to comment Share on other sites More sharing options...
henryberkins Posted February 25, 2007 Author Share Posted February 25, 2007 im not sure, but im pretty sure around the 320 mark, there was no sand, just snow on the ground, all sand was covered by it, and it cant be snow because some of the spots are way to big to be snow. Link to comment Share on other sites More sharing options...
mike_smith2 Posted February 26, 2007 Share Posted February 26, 2007 Possibly "spatter" of some sort, residue from cleaning sensor with an air can perhaps? - little fluid spots concentrate the light like a magnifying glass, hence white not black artifacts Link to comment Share on other sites More sharing options...
henryberkins Posted February 26, 2007 Author Share Posted February 26, 2007 dont think so, could be inside the lens, but as much as i feel ashamed for saying this, i hardly ever clean my lens. this is quite the mystery, havent been out shooting lately, but maybe tommorow ill go and see if the same thing happens. Link to comment Share on other sites More sharing options...
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