My good lens and dust

[ecniv]

Hiya,

My favoured 105mm macro has dust inside the lens. sigh

typically happens when on holidays so I guess its photoshopping time ;)

Can you guys/gals recommend a good place to get it cleaned/fixed and aprox time/cost?
Assuming some of you have cleaned lenses by pros?

Thanks in advance

[OutLore]

Are you sure it's in the lens? If there's spots on your pictures, then I would think it's more likely to be sensor dust.

If you can see dust in the lens, it's unlikely it will show on your pics.

Do you have a sample pic? And any pics of the dust in the lens (if that's where you can see it?)

[Martyn...]

Hiya,

My favoured 105mm macro has dust inside the lens. sigh

typically happens when on holidays so I guess its photoshopping time ;)


I am guessing that it is visible on shots taken in bright light with a small aperture, in which case I would say the dust is on the sensor.

[Deckard]

Ditto to the above. Visible specs on your images = sensor dust. A little dust inside the lens may just conceivably rob a little contrast or cause extra flare, but it won't cause visible blobs.

Have a look a this article to see just how bad things have to go before they're visible! http://kurtmunger.com/dirty_lens_articleid35.html

[ecniv]

Took the lens off, changed to manual, opened up (f2.8) looked through. there are marks/dust inside. :/

Not the sensor (that was my first thought) unfortunately.

Some pics taken have a small sharp mark (photoshop/gimp will deal with this) but at a longer range it blurs out. Some portrait type shots have a blur on the forehead... Which paniced the model briefly :)

[HoppyUK]

Any dust inside the lens is invisible. It will not show up in photos.

If you have marks on your images, then it is sensor dust. Sensor dust is only visible at high f/numbers. Shoot a plain surface at f/16-ish to see what you've got. Change lenses and do the same, and the sensor dust marks will be in identical places.

In terms of image quality, you need a huge amount of dust for it to make any difference, and then it will show itself as flare if you shoot into bright light.

[ecniv]

Thanks

Will try the lenses check ... but I am pretty sure it was only the one lens that had the problem.

Will post up later.

[ecniv]

Ok... you guys are right. Used the 50mm at f16 and the dust is evident.

I dont have a blower with me and the clean sensor option is not moving it, how to I remove?
Also the option to lock mirror up for cleaning is disabled. Wouldn't I need that too?

[Martyn...]

Also the option to lock mirror up for cleaning is disabled. Wouldn't I need that too?



Needs a fully charged, or near to fully charged battery to allow the mirror lock up function.

[ecniv]

ok.. Good I shall charge up and obtain a blower.

Thanks :)