Blotch in photos.
Jan 11, 2016 21:50:25 #
jarneyd
Loc: New England
I shot the Coast Guard boat on Sat Morn in a light drizzle and thought there may have been a water spot on the lens, but shots from today(farm) have a much darker spot in the exact location, I am guessing because of smaller apertures. The farm shot is from today. I have checked and the spot is there in some form in all the photos from Sat and today. I am hoping that it is just a spec of dirt on the sensor. These were shot with a d7100 that I have had for a month, using a 18-105 nikon vr that I used for years on my D90 and never had anything like this. I did a sensor cleaning and tomorrow I will shoot some sky shots to see whats there(nothin I hope). If its still present what do you suggest? Thanks
Jan 11, 2016 21:51:48 #
jarneyd
Loc: New England
It is in the upper left corner above the bow pulpit and quite visible in the farm photo.
Jan 11, 2016 22:15:17 #
Dust on the sensor shows up sharper when using a small aperture.
I suspect the boat photo was taken at a larger aperture than the farm.
You don't need a sky to test this.
Just put a piece of paper over your lens and point the camera at a light source. Put your camera on aperture priority and set it at f/16 or f/22 and don't worry about camera movement from a long shutter setting.
It won't matter as the sensor moves with the camera.
Best if you set to overexpose by a stop.
You may have to set the camera to manual focus so it will fire.
It's a lot more convenient than waiting for daytime, especially when the temp is in the single digits.
I suspect the boat photo was taken at a larger aperture than the farm.
You don't need a sky to test this.
Just put a piece of paper over your lens and point the camera at a light source. Put your camera on aperture priority and set it at f/16 or f/22 and don't worry about camera movement from a long shutter setting.
It won't matter as the sensor moves with the camera.
Best if you set to overexpose by a stop.
You may have to set the camera to manual focus so it will fire.
It's a lot more convenient than waiting for daytime, especially when the temp is in the single digits.
Jan 11, 2016 22:31:05 #
jarneyd
Loc: New England
Thanks Goofynewfie, I will try that. Whats your suggestion if its still there after I have cleaned the sensor?
Jan 11, 2016 22:34:23 #
Considering that the stuff changes with the lens length I would be looking at what is on or in the lens...
Jan 11, 2016 22:36:46 #
jarneyd wrote:
Thanks Goofynewfie, I will try that. Whats your suggestion if its still there after I have cleaned the sensor?
Then you didn't clean it well enough.
It sometimes takes me three swabs to get mine clean.
Have you done this before?
The spots are definitely on your sensor.
Jan 11, 2016 22:40:52 #
jarneyd
Loc: New England
Its still there. I will try another sensor cleaning. Then what do I try next?
Jan 11, 2016 22:46:50 #
jarneyd wrote:
Its still there. I will try another sensor cleaning. Then what do I try next?
Holy crap!
Is that a paper bag?
Use white printer paper.
What lens were you using?
If it was a side angle, switch to a tele.
Set your focus to infinity and overexpose some more, maybe 2 stops.
If the spot is still there, clean it again.
Jan 11, 2016 22:49:58 #
jarneyd
Loc: New England
Tried 2 more sensor cleanings and switched to My Nikon 50mm 1:1:4 manual focus lense. Still there. Could it be a bad pixel or is it definitley something on the sensor? Thanks
Jan 11, 2016 22:53:36 #
jarneyd wrote:
Tried 2 more sensor cleanings and switched to My Nikon 50mm 1:1:4 manual focus lense. Still there. Could it be a bad pixel or is it definitley something on the sensor? Thanks
Not a bad pixel.
Jan 12, 2016 00:44:52 #
When you say you cleaned the sensor multiple times did you use the in camera sensor cleaning option in the menu or did you actually remove the lens and raise the mirror and physically swab the sensor?
Jan 12, 2016 03:45:30 #
jarneyd wrote:
I shot the Coast Guard boat on Sat Morn in a light... (show quote)
Dust on the sensor. Carefully clean it with a wet swap (specifically made for cleaning camera sensors), or take it in to a camera repair facility and have them do it. $30 to $50 is about right.
Jan 12, 2016 06:41:58 #
definitely looks like something on that sensor...you really need to get that cleaned off .do you have a local camera store that has someone that can clean it off for a small fee..
Jan 12, 2016 06:45:01 #
Could it be on the mirror? If not lens and not sensor...it must be somewhere else? At that size it should be visible to the naked eye or at least with a magnifying glass...have you been able to actually see the suspect area with the naked eye? As soon as you take off the lens, you see a flat shiny surface...where stuff collects. But I think I have heard this is not the sensor itself.
GoofyNewfie wrote:
Then you didn't clean it well enough.
It sometimes takes me three swabs to get mine clean.
Have you done this before?
The spots are definitely on your sensor.
It sometimes takes me three swabs to get mine clean.
Have you done this before?
The spots are definitely on your sensor.
Jan 12, 2016 07:05:19 #
georgevedwards wrote:
Could it be on the mirror? If not lens and not sensor...it must be somewhere else? At that size it should be visible to the naked eye or at least with a magnifying glass...have you been able to actually see the suspect area with the naked eye? As soon as you take off the lens, you see a flat shiny surface...where stuff collects. But I think I have heard this is not the sensor itself.
The mirror is not down during the shooting process its up so the spot is on the sensor since he changed lenses and its still there. Shaking the sensor sometimes doesn't work so a rocket blaster is the next best thing and then possibly a cleaning stick or swab. If the OP is not confident about his ability to use a cleaning stick or swab then its better to get a camera shop to clean it.
Larry
If you want to reply, then register here. Registration is free and your account is created instantly, so you can post right away.