I believe I have some debris on my D750 sensor...
Mar 22, 2021 01:15:36 #
mbaggs
Loc: Daphne, AL
In the sky mostly center and center right I see several small round circles. I have thought they were on my other lenses and had cleaned them and forgot about it. This is first time for this lens on camera so it has to be on sensor. Is this what dust looks like or is it perhaps something else? Thanks for any help!
BTW - picture is of downtown Mobile, AL at northwest corner of Mobile Bay shot from Fairhope, AL on Mobile Bay's eastern shore about 15 miles away. Using a Nikkor 200-500 lens.
BTW - picture is of downtown Mobile, AL at northwest corner of Mobile Bay shot from Fairhope, AL on Mobile Bay's eastern shore about 15 miles away. Using a Nikkor 200-500 lens.
Mar 22, 2021 04:29:58 #
Orphoto
Loc: Oregon
Looks like dust. Take any lense, aim at a lit wall, overexpose by a couple of stops and move the camera wildly. Use a small aperture like 16. If the spots are there, wll be dust.
Mar 22, 2021 06:50:00 #
mbaggs wrote:
In the sky mostly center and center right I see se... (show quote)
Use the "store original" checkbox so we can more easily see your image and camera settings. If you have round circles, they aren't dust. If you have dark spots or small smudges, then dust is likely. This stuff cannot be easily seen on the thumbnail image.
Mar 22, 2021 08:10:08 #
Can't see anything on that tiny thumbnail. Use Store Original.
Mar 22, 2021 08:11:53 #
Mar 22, 2021 08:17:55 #
Orphoto wrote:
Looks like dust. Take any lense, aim at a lit wall, overexpose by a couple of stops and move the camera wildly. Use a small aperture like 16. If the spots are there, wll be dust.
(1) As far as using a wall is concerned, any uniform surface will do. I find a blank word processor page brought up on my monitor works well.
(2) No need to move the camera wildly. All you need is to make sure the surface you are using is far out of focus so any structure will not interfere with the detection of spots. To ensure the surface is not in focus, turn off autofocus, set the lens to infinity, and move in close. (Although if you do move the camera it will not affect the dust spots since they move with the camera. That means long shutter speeds will not cause a problem).
https://www.uglyhedgehog.com/t-690025-2.html#12094854
Mar 22, 2021 15:20:35 #
mbaggs wrote:
In the sky mostly center and center right I see se... (show quote)
If you want to see the spots better, shoot the clear blue sky - with the lens stopped down to the smallest aperture. If the sensor is dirty you'll see it. But it won't look like small circles.
Mar 23, 2021 00:34:26 #
mbaggs
Loc: Daphne, AL
Not sure how to edit original post, I used reply to add the image so hopefully it can be seen. Thank you all for your help!
Mar 23, 2021 01:17:24 #
You can use LR to easily remove these relatively minor spots. It would have been better to not strip the EXIF when exporting from LR, as now we need to ask what aperture was used for this image? The dust is minor, and these are all run of the mill sensor dust. The images looks like it could be captured using f/11. If you were smaller, one way to avoid this issue is to not shoot such a smaller aperture, smaller than say f/11 to f/13.
I circled all the spots I could see. If you move the image up and down on your screen, you can see the minor spots easier as you use the LR Spot removal tool in the 'heal' mode. It probably took me longer to circle the dust than it would be to click through the image in LR.
Is your cleaning cycle active on your camera? Do you have a Giotto rocket-air to blow off the sensor? Here's an example of how effective this $8 blower can clean off a sensor with much worse dust:
An exercise in sensor cleaning
I circled all the spots I could see. If you move the image up and down on your screen, you can see the minor spots easier as you use the LR Spot removal tool in the 'heal' mode. It probably took me longer to circle the dust than it would be to click through the image in LR.
Is your cleaning cycle active on your camera? Do you have a Giotto rocket-air to blow off the sensor? Here's an example of how effective this $8 blower can clean off a sensor with much worse dust:
An exercise in sensor cleaning
Mar 23, 2021 08:15:20 #
Yup, there's a lot of dust on your sensor. I'd suggest that you have it cleaned.
--Bob
--Bob
mbaggs wrote:
Not sure how to edit original post, I used reply to add the image so hopefully it can be seen. Thank you all for your help!
Mar 23, 2021 11:44:27 #
rmalarz wrote:
Yup, there's a lot of dust on your sensor. I'd suggest that you have it cleaned.
--Bob
--Bob
First, run the sensor cleaning on your camera. Second, remove your lens, lock up the mirror and vigorously blow off the sensor with a squeeze bulb air blower device.
Mar 23, 2021 12:51:53 #
Mar 23, 2021 20:21:37 #
I grew up in Mobile and have seen that view demo the east side of the causeway and then I-10 many times.
Mar 24, 2021 00:17:46 #
Mar 24, 2021 10:32:37 #
mbaggs wrote:
In the sky mostly center and center right I see se... (show quote)
You can always give it to these guys - I'm sure they'll make the camera look as good a new!
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