mikeadams Posted April 1, 2007 Share #1  Posted April 1, 2007 Advertisement (gone after registration) This is a technical question: I have a brand new M8 and my M7 lens, a fairly new 35 F2 ASPH Summicron.  Today I noticed some spots in a clear sky part of a photo, I thought maybe sensor dirt, but with the lens off shooting the sky, no spots. I cleaned the lens (what is the best way to do this?) and I took this group of photos of the sky.  F2, inf and 2.5' focus F5.6 inf and 2.5' focus F 16 inf and 2.5' focus  First, whether inf or 2.5' (the closest) it does not matter, but while the spots are blurred using F2, it is really intense at 5.6, more so at 16. Here are three "Loupe" screen grabs from CS3 bridge. Where are these spots coming from?    Mike http://www.mikeadams.org Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/20287-seeing-ugly-spots/?do=findComment&comment=217277'>More sharing options...
Advertisement Posted April 1, 2007 Posted April 1, 2007 Hi mikeadams, Take a look here Seeing Ugly Spots. I'm sure you'll find what you were looking for!
robsteve Posted April 1, 2007 Share #2 Â Posted April 1, 2007 They are dust. As you stop down dust on the sensor gets darker. Get a rocket blower bulb and use the sensor clean mode of the M8 and try just blowing the dust off. Link to post Share on other sites More sharing options...
mike prevette Posted April 1, 2007 Share #3 Â Posted April 1, 2007 sensor dust will show up less with the lens off. Light coming from so many angles can eliminate it. Try shooting your lenses very stopped down (f16) in order to see the dust. Link to post Share on other sites More sharing options...
mikeadams Posted April 1, 2007 Author Share #4 Â Posted April 1, 2007 OK. The last photo at F16 shows the most intense spots so I will try to clean. I just got the camera last week, the store owner attachd my lens and it has never been off the body until my "experiment" today maybe it's Solms dust. Â Otherwise an impressive camera. Â Mike http://www.mikeadams.org Link to post Share on other sites More sharing options...
rwfreund Posted April 1, 2007 Share #5 Â Posted April 1, 2007 Cleaning a digital sensor is a task that comes with the territory. -bob Link to post Share on other sites More sharing options...
jrc Posted April 1, 2007 Share #6 Â Posted April 1, 2007 If you really want to see how much dust you've got on your sensor, point at at the sky, take your shot, import it into Photoshop, click on image>adjustments>auto levels. You'll see more dust than you can believe. Â JVC Link to post Share on other sites More sharing options...
Bill W Posted April 1, 2007 Share #7 Â Posted April 1, 2007 Advertisement (gone after registration) My M8 came with a dirty sensor right out of the box. It requred a sensor cleaning which I did with Eclipse and Pecpads. There are several articles about sensor cleaning. It part of the territory with a digital camera. The first time is a little unnerving if you have not ever done it but it is easier witht he M8 than my Nikons. You might try to Google digital sensor cleaning. Link to post Share on other sites More sharing options...
mikeadams Posted April 1, 2007 Author Share #8 Â Posted April 1, 2007 I did try to blow it off with a small but old rubber blower but it didn't really help, and I can see spots looking at the sensor with the naked eye. I don't want to physically touch it, but I need a better solution? Â When I turn the wheel and blow up the image they are still obvious, many of them. Â What next? Â Mike http://www.mikeadams.org Link to post Share on other sites More sharing options...
Shootist Posted April 1, 2007 Share #9  Posted April 1, 2007 I did try to blow it off with a small but old rubber blower but it didn't really help, and I can see spots looking at the sensor with the naked eye. I don't want to physically touch it, but I need a better solution? When I turn the wheel and blow up the image they are still obvious, many of them.  What next?  Mike Mike Adams at San Jose State University Copper Hill Images - CCD/CMOS Cleaning Tutorial - Introduction  And  www.copperhillimages.com  Fifth one down. Link to post Share on other sites More sharing options...
JWW Posted April 1, 2007 Share #10 Â Posted April 1, 2007 I use the Rocket Blower and Arctic Butterfly just about every week or so. Works great and just takes a few minutes. Â See review: Visible Dust Review Link to post Share on other sites More sharing options...
mikeadams Posted April 1, 2007 Author Share #11 Â Posted April 1, 2007 In 3 years Inever cleaned my Nikon D-100 now D-200, ever, but maybe I have not noticed before. Tell me please, what should I not do to avoid damage? I tried the blower brush earlier but it did not budge the problem and I still see it in bright light, looking at the sensor with the naked eye. Â Is is that fragile? Â Mike http://www.mike adams.org Link to post Share on other sites More sharing options...
carstenw Posted April 1, 2007 Share #12 Â Posted April 1, 2007 Leica sensors are pretty tough as far as sensors go, but they are not unscratchable. I would start with the Artic Butterfly 1.3x pro kit and see where that gets you. It seems a bit expensive, but I have not had to go beyond this kit yet. Link to post Share on other sites More sharing options...
marknorton Posted April 1, 2007 Share #13 Â Posted April 1, 2007 As Robert Freund said, cleaning the sensor instead of blowing the dust around is a rite of passage to happy M8 ownership. Â The sensor is as tough/fragile as you'd expect a piece of glass 0.5mm, 1/50 inch thick to be. The best solution is to clean the sensor with a Sensor Swab made damp, not wet, with Eclipse fluid. Â Wipe the sensor with a single slow (3-4 seconds) deliberate action. Use the swab once only. Â If you're nervous, try sprinkling paprika dust on a blank CD and practice with that. Link to post Share on other sites More sharing options...
RSL Posted April 1, 2007 Share #14 Â Posted April 1, 2007 Mike, Go to Cleaning Digital Cameras. The whole site's about cleaning sensors. Link to post Share on other sites More sharing options...
Shootist Posted April 1, 2007 Share #15  Posted April 1, 2007 In 3 years Inever cleaned my Nikon D-100 now D-200, ever, but maybe I have not noticed before. Tell me please, what should I not do to avoid damage? I tried the blower brush earlier but it did not budge the problem and I still see it in bright light, looking at the sensor with the naked eye. Is is that fragile?  Mike http://www.mike adams.org   Have you gone to and read some of the links posted? Or would you like someone to come over to your house and clean the sensor for you. Link to post Share on other sites More sharing options...
mikeadams Posted April 1, 2007 Author Share #16 Â Posted April 1, 2007 I now know what I must do. I appreciate all the advice and links and I will read and learn. Because the M8 is such a major investment I don't want to do anything stupid. Â Luckily I work at a large university and I know the pro photographer there and he should have the latest cleaning kits and experience. I will buy him coffee and donuts and he will make jokes about my expensive liitle camera and my one lens! Â Mike http://www.mikeadams.org Link to post Share on other sites More sharing options...
masjah Posted April 1, 2007 Share #17  Posted April 1, 2007 Luckily I work at a large university and I know the pro photographer there and he should have the latest cleaning kits and experience. I will buy him coffee and donuts and he will make jokes about my expensive liitle camera and my one lens! Mike Mike Adams at San Jose State University  I bet he won't! He'll want one. Link to post Share on other sites More sharing options...
mikeadams Posted April 1, 2007 Author Share #18 Â Posted April 1, 2007 You are right, he will want one. When he saw me on campus 3 years ago and I was wearing my then new D2 he made similar comment but I could tell he had Leica lust. Then I will tell him about home equity loans. Â Anyway, it's great to know pro photographers. Â Mike http://www.mikeadams.org Link to post Share on other sites More sharing options...
brucek Posted April 1, 2007 Share #19 Â Posted April 1, 2007 What's causing the big blob? Link to post Share on other sites More sharing options...
photolandscape Posted April 1, 2007 Share #20 Â Posted April 1, 2007 If the cleaning doesn't work, don't rule out the possibility of ufo's. Link to post Share on other sites More sharing options...
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