On the inside of the lens... that requires a professional...
is it near the front of the lens...
...ALL camera lens should have a less expensive "filter" on the front to protect the main lens.....
... make sure your protector filter has not let some "stuff" in...if you have one.. just carefully take it off.. be careful cleaning it!!
how to clean camera lens Google Search
SOURCE: dirt on the inside of the front lense
Hello, I very much doubt that a small piece of dirt on the lens is a problem. It is more likely that your sensor needs to be cleaned. Sensor dirt is more visible at small (f11 to f32) apertures. I expect that you are shooting bright snow with a small aperture & this is why you are seeing the problem. To check, try the following.
Set camera to Av, ISO 100.
take some photos of the sky, a blank wall, or some other featureless surface, as follows:
1 - Set aperture to highest possible f - number.
2 - set aperture to lowest f-number.
3 - repeat 1 with a different lens
4 - repeat 2 with a different lens.
I expect that you will see photo 1 and photo 3 will have identical smudges of dirt on them. Photos 2 and 4 should have no smudges. If this is the case, your problem is dirt on the camera sensor. The only way to fix it is to clean your sensor.
SOURCE: pieces of dirt/oil residue on INSIDE of viewing lens.
That is not oil.....its thermal burns. Thermal burns happen when the eyepiece cap is not used. Sunlight burns the surface of the LCD display. This is permanent damage. Cleaning will not fix this. The repair center can fix.
SOURCE: Dust and dirt removal from Helios objective lens
You will need to remove the mirror and clean it according to these instructions. Then you will need to collimate the scope after you put it back together.
See these two web sites:
http://www.astro-tom.com/tips_and_advice/cleaning_optics.htm#article1
http://www.andysshotglass.com/Collimating.html
SOURCE: Hi there.
Do not attempt this. There are alighnments here that may need to be made.Just clean the dust off the lens surface. Use micro fiber towel or lense cleaning cloth.
SOURCE: Camera has condensation inside. Can I clean lenses and how?
Hello
Ok, i had the exact same problem, and all i did was to put the camera in a sealed container wth about 2 cups of rice. I left it in there for 2 days.
I really hope this can be of help.
Kind regards
Andrea
Your projector needs little maintenance. The only thing you
need to do on a regular basis is
to keep the lens clean.
Never remove any parts of the projector except the lamp.
Contact your dealer if other parts
need replacing.
Cleaning the lens
Clean the lens whenever you notice dirt or dust on the
surface.
• Use a canister of compressed air to remove dust.
• If there is dirt or smears, use lens-cleaning paper or
moisten a soft cloth with lens cleaner
and gently wipe the lens surface.
Never rub the lens with abrasive materials.
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