Lens cleaning

[Eggle]

Is it ok to use disposable prescription glasses cleaning tissues on camera lens?

[Gemm]

Eggle said:

Is it ok to use disposable prescription glasses cleaning tissues on camera lens?

Not sure...... but make sure you use a brush and/or blower first to remove all the dust particles.

[ian in lancs]

I do! I use the pre-moistened tissues in sachets.

[Eggle]

OK, well I have cleaned the front glass, but still have a problem.
These blobs are there, shown with the arrows.
I know it is the lens as if I take it off and snap a shot, it is clear.
Tips please and advice on how to remove the blobs.

[RobDickinson]

What camera? SLR or P&S?

If SLR shoot a white pice of paper at f22, still there most likely something on the sensor so clean that too ( ask advice tho!)

If P&S you may be stuffed and need to get it serviced. They shouldnt be obvious in normal photo's and easily cleaned up if they are.

[Eggle]

SLR, 20D.
Shot on white, they are there with the lens, but not without a lens.

[RobDickinson]

You need to clean the sensor then. Shoot white at over exposed values ad +2 exp comp, f22, you should see them clearly.

Use a blower to clean the sensor then shoot again.

[AndWhyNot]

Eggle said:

SLR, 20D.
Shot on white, they are there with the lens, but not without a lens.

The reason they're there with but not without a lens is that once you take the lens off there's nothing to funnel the light and cause dark spots on your final image, which are essentially shadows from or silhouettes of the artefacts on your sensor.

[Eggle]

RobDickinson said:

You need to clean the sensor then. Shoot white at over exposed values ad +2 exp comp, f22, you should see them clearly.

Use a blower to clean the sensor then shoot again.

Sorry Rob, I am being thick. If the camera doesn't show them with out a lens on, surly the blobs are in the lens?

[RobDickinson]

I dont think that'd work would it?

[Eggle]

This is with out a lens attached to the body, again at the same white background.

[MonkeyHanger]

Dirt spots on a lens would need to be huge to show up. The dirt is definitely on the sensor.

[Eggle]

I understand.
Is cleaning the sensor something I should be doing or taking it to a specialist?

[RobDickinson]

I use a blower on mine that gets most of it off, I havnt touched the sensor some poeple do others take it in to be serviced.

[Eggle]

Took it to a Canon Super Centre today and they have give it a good clean. It was dirty so they said, so I am happier now.

[Gemm]

Eggle said:

Took it to a Canon Super Centre today and they have give it a good clean. It was dirty so they said, so I am happier now.

Where is Canon Super Centre and how much did they charge??

[Eggle]

T4 cameras, I used the one in Witney.
£40 for the clean.
I was quoted £50 by another shop.
I needed it done as I have my brothers wedding at the weekend.