D300/Nikon 12-24/Sigma 50-500mm issues - please help!

[polochick]

Hiya,
I went out to play with my new lenses this week and have issues lol. I cleaned both lenses with a cloth before going out.
Firstly the Nikon 12-24mm f4. Is this just an issue of my sensor needing cleaning? It only seems to happen at ultra wide angles. I had a tokina 11-16 last week and the same issue with the white dot at the top of the image. The dot doesnt always appear and sometimes (I think) comes out black.
http://www.talkphotography.co.uk/gallery/data/3527/DSC2712web.jpg (http://www.talkphotography.co.uk/gallery/showphoto.php?photo=69337)
http://www.talkphotography.co.uk/gallery/data/3527/DSC2715web.jpg (http://www.talkphotography.co.uk/gallery/showphoto.php?photo=69338)
http://www.talkphotography.co.uk/gallery/data/3527/DSC2729web.jpg (http://www.talkphotography.co.uk/gallery/showphoto.php?photo=69339)


And secondly the Bigma. Dust?
http://www.talkphotography.co.uk/gallery/data/3527/DSC2855web.jpg (http://www.talkphotography.co.uk/gallery/showphoto.php?photo=69341)

Many thanks in advance for your ideas and help,
Liz

[Martyn...]

Run the sensor cleaner a couple of times and see if they are still there, they look like sensor dust / hair :thumbs:

[desantnik]

Looks like sensor dust to me... try a blow with a rocket blower or if that won't shift it then its either time for the Arctic Butterfly or a trip to a dealer for a clean.

[polochick]

Thanks, will try this now.

[darrenb]

Yup, deffo dirt or dust on the sensor...the dot may change from white to black dependant on aperture and shutter speed...I use Dust-Aid for dry cleaning of the Sensor and Dust-Wand for wet cleaning...both excellent.

[awp]

1st three are shot at f/22 - that will show up sensor dust easily looks pretty dirty. try shooting wide open and I'll be you don'tt see anything.