I'll bet Linwood's reference to "air" is a reference to a hand-blower like the Rocket Air. That's pretty safe, but anything with more force can leave you with a disaster. Years ago I had a pro friend who managed to get dust between the sensor and its filter. Not a good thing to do.
>I'll bet Linwood's reference to "air" is a >reference to a hand-blower like the Rocket Air.
Yes, what he said.
Though (clean) compressed air is handy for adding a static charge to the sensor brushes. I think that's what the "artic butterfly" does indirectly, is spin it in the air to pick up a charge. A can of air and a brush seems just as easy.
The reason the air wouldn't do it is that from the picture you posted it's obviously oil. As far as I know every new DSLR spits oil for the first couple thousand exposures -- at least I've never had one that didn't, and I've had several.
Your reference to oil is not exactly correct. There is lubricant used in the shutter mechanism, but it is a dry lubricant rather than oil. The lubricant is used in very small amounts - micrograms - with the specific amount adjusted during design and assembly of the shutter.
There are many sources of debris and dust inside the camera mirror box. Once you get dust or debris in the mirror box, it very hard to remove. Even during assembly, most of the attention goes to the sensor and cleaning the sensor, but dust or debris in the mirror box eventually makes its way to the sensor unless it is removed in some other manner. It's very easy for the manufacturing process to create a little dust or debris that is not on the sensor - and it takes time to eliminate that material from the mirror box.
All that may be true, Eric, but whatever the lubricant is, it's spit onto the sensor of every DSLR I've had for the first couple thousand shots. In addition, if it really were dry, seems to me it would either blow off with a Rocket blower, or jump onto my Arctic Butterfly. Instead, it doesn't blow off, and the brush simply smears it. It may not be oil, but it sure acts like oil. I'd be tempted to say that if it quacks like a duck and walks like a duck, it's probably a duck, though you may be right, it may be a goose masquerading as a duck. In any case, after the first couple thousand shots the problem goes away. I haven't had to clean my D3 sensor for about four years. I'm still cleaning my D800, though the situation is improving greatly.
>It may not be oil, but it sure >acts like oil. I'd be tempted to say that if it quacks like a >duck and walks like a duck, it's probably a duck, though you >may be right, it may be a goose masquerading as a duck.
They say "Perception is reality".
Ever get dry graphite (like for lock lubrication) on your hands. Or laser toner. Seems more liquid and greasy than grease.
But I'm confused -- are we saying that the D800 is plagued by duck poop on the sensor? Oh no, another Nikon internet crisis, I'll go post the requisite notes on a bunch of forums.
Yeah, Maybe it IS duck poop, Linwood. I'm pretty sure Eric is right. Dry graphite acts like oil in a lot of ways, though I doubt that's exactly what Nikon's using. But whatever it is, it acts like oil and it presents you with the same problems oil would present you with. You end up having to do a wet cleaning whether it's duck poop or goose poop. Maybe a sniff test?
>You end up having to do a wet >cleaning whether it's duck poop or goose poop. Maybe a sniff >test?
You first. I don't want to risk getting my nose stuck in the camera body. While not as hard to explain as many foreign object issues that show up in the ER, still...
To the OP -- I've done about 3 cleanings if memory serves, all but one within the first few thousand images. The last one was had just a spot near the center, my guess is it came from outside not inside the camera. I'm not all that careful changing lenses in the field, I guess I'm surprised I do not have a lot worse.
But the initial oil(like) stuff will go away, just keep shooting and plan on one or two more cleanings before it settles down.