Lens problem?

[wrxxx]

I've got a D60 - just purchased a Canon 20-35. Noticed
artifacts in pictures of sky. Cleaned lens & filter - same
problem. Took off filter - same problem. Changed to
my 50 mm - no problem. Must be the lens, right.

Sent lens back to B & H, they replaced it (different serial
number). Same problem.

I haven't posted photos to this forum before so hopefully
this will work - in trying to make them small (under 200K)
I may have lost essential detail to figure out what's
going on.

Any hints, suggestions, avenues of exploration would
be appreciated,

Thanks.

Matthew

1st 20-35 (http://matthewleavitt.fotopic.net/photo.php?id=1134926)

2nd 20-35 (http://matthewleavitt.fotopic.net/photo.php?id=1135010)

[Andy_T]

Dark or light artifacts?

Light artifacts might, in fact, be lens flare.

Regards,Andy

[CyberDyneSystems]

Dirt on the CMOS sensor?

I ralize that you used a different lens and the artifacts weren't there,. BUT sometimes I get the dust showing up in pics,. sometimes I don't.

Try a long exposure of the sky with the 50mm lens. See If the artifacts show up then,. if it does,. you have dust on the CMOS sensor.

[sigler]

This is probably a dirty sensor. I just recieved my pec-pads and solution today...Wish me luck, my sensor is FILTHY!

I have similar pictures. There are many posts on here about cleaning the sensor.

Best of luck,

Rob "The Dirty Sensor" Sigler

[Hatem Eldoronki]

Definitely sensor is in need of cleaning..

[pwagner]

A close inspection of the two pictures reveals that ALL THE SAME spots are there. It's just got to be the sensor. I'd suggest taking a shot of the bright blue sky (focus set to anything) with two different lenses. Perhaps your sensor has "tough dust" or "stuck on dust".

[elm54]

Hiya,
When I had dust on my sensor it only showed up when stopped at about f/13 maybe f/11 but I definatly needed dof.

Eric

[boobops]

Definitely dust.

Personally I very rarely shoot at anything smaller than F8. However, I feel it is physically impossible to remove enough dust to shoot at F22. I have cleaned the sensor and had maybe one clean shot - after that I get a different dust pattern. So, that action of the shutter causes locked in dust to be attracted to the sensor.

Maybe Canon should consider some kind of electro-static trap for dust.

It doesn't bode well for when Canon release a 14-16MP full frame sensor.