Grease Spots on Nikon D700

[mbrager]

Hi Leroy:
I'm wondering why you think it's grease and not dust, which is quite common in DSLRs and shows up in my photos all the time. Mike

[leroylockwood]

Hi Mike,

Thanks for the question. I have several reasons why I do not believe these are dust spots.

1. I rarely detach my lens from the body, especially when I'm away from home. I use a D90 for telephoto shots.

2. The spots showed up all of a sudden, although I have the dust removal function turned on.

3. Neither the dust removal function nor numerous blasts with the Rocket Blower helped.

4. Some of the spots have a "ring" like light perimeter. (See image below.) The fringe of the liquid seems to be refracting the light. (Strictly my conjecture.)

5. The spots are quite small and hardly noticeable on a monitor. Once I started looking for them, they were all over the top third of the images -- bottom third of the sensor -- not the entire sensor.

6. The technician at BorrowedLenses.com who cleaned the sensor the first time mentioned that it was his "toughest ever cleaning job." He had to apply the cleaning fluid numerous times to "soften" the larger spots. This leads me to believe that the grease had dried up. (Again, conjecture on my part.)

7. When it happened the second time, I dropped off the body at Nikon's Service Center at Melville, NY. The service order stated, "CCD CLEANING GREASE SPOTS ON SENSOR" The service write up did not contradict this and added "CKD OVER HAUL". I dropped it off on September 9. It was not ready for pick up until September 22. A simple dust removal should have taken less time and wouldn't have required an overhaul.

[Andrew]

If it continues to be a problem you might take a look at Products ? DSLR sensor cleaning

I have never used the product but have read a couple of good reviews not associated with their website. Hopefully Nikon cleans enough of the mirror lube off so you don't get any more splashes. Good luck.

[Marko]

Hi there Leroy,

Although I have not had this problem, I have heard of it indeed. I have heard that it comes from the mirror mechanism in action and that action can cause 'splatter' in some cameras. I am not an expert at all in this, but the marks you point to, look like grease marks to me. good luck!

[leroylockwood]

Hi Marko,

Thank you for the input. I'm starting to get a little paranoid about looking for spots on my images. Sure hope Nikon took care of the problem, permanently!

Leroy

[Yisehaq]

Hi Leroy,
I am not an expert and probably you know this by now but it's better to avoid narrow apertures like f16 or f22 as this spot will be more elaborate on these f stops.

[leroylockwood]

Hi Yisehaq,

Yes, you are definitely correct. Thank you.

Leroy

[leroylockwood]

Hi Andrew,

Thanks for the information. Yes, I better pick up a kit in case it happens again.

Actually, the first time I got those spots, I was in San Francisco on vacation (to be precise, South San Francisco). I took a train to a shopping center about 10 miles away expecting to buy a cleaning kit at Ritz Camera to do it myself. When I got there, I was told that they no longer carry sensor cleaning kits because they feared that customers could ended up damaging the sensors and that they didn't want to be held liable. Interesting, huh? So I returned to my hotel and found BorrowedLenses.com on the internet. Their standard price was $45 if you leave the body overnight, $65 to have it done in one hour. Considering that I needed the camera right away, and having had to take the train back and forth, which runs only once every hour, I think it was worth the price. But, in the future, I'll do it myself. I guess I better practice a couple of times at home -- once I build up my courage.

Leroy