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Zip2 , (edited )

You might want to give your sensor a manual clean with a the appropriate swab and fluid before anything as drastic as disassembling the lens. The further from the sensor, the less visible marks are, which is what makes me think this is dirt on your sensor I’ve got lots of lenses with dust in and it makes no difference.

hanke OP ,

How easy is this to perform? Is the risk of messing up high? I don’t mind tinkering with stuff, but if there is too much risk I’d prefer just leaving it to a professional.

Zip2 ,

It’s really not hard, I’ve always done all of my cameras myself. But if you’re not confident then your local camera store might be able to do it for you for a fee.

hanke OP ,

I took a look at the sensor for the first time ever. It did not look like what I expected it to. Nothing wrong, just not what I expected to see.

What do I need to clean it? Is there any good guide I can follow?

Zip2 ,

I use swabs and fluid from Visible Dust and VSGO, you can normally buy them together in kits, just make sure you get the correct size for your sensor.

Don’t over moisten the swabs, just a couple of drops is sufficient, and don’t push down too hard on the sensor. Plenty of videos on YouTube I’d imagine.

hanke OP ,

Aah, cool. I’ll look it up.

I’m still convinced the error is in the lens though… Since it goeas away if i open up the apreture a lot.

Zip2 ,

You might be right, have you got another lens to check your theory though?

hanke OP ,

No, that’s the thing. I only have the one lens. I just got into photography and got this camera second hand. It is in really good shape except for this. But yeah, ony one lens this far.

I’ve been wanting to get a zoom lens, but I don’t dare to buy anything since I don’t know what to look for yet. So my plan is to learn a lot about lenses and get a zoom lens when I know what to get.

Zip2 ,

Ok, one thing you might be able to try is to take the lens off and take a picture of the white wall again. If the spot is on the sensor it should be in exactly the same place. You might need to change a camera setting before it will let you do that though.

One thing that surprised me when I found out about it was to detach the lens and shine a torch up through it. It’s probably got a lot more dust in than you might expect, and it doesn’t affect the image. Likewise I’ve had mud on the larger end and not even noticed. That and having had some really dirty sensors in the past makes me think it’s probably that.

hanke OP ,

Here are 2 photos without the lens on.

I can’t see any smudges this time. Dust in lens confirmed? Also, all smudges I could previously see in the viewfinder was gone as well.

https://feddit.nu/pictrs/image/2bdb0b3b-15e0-4016-aa2c-6140e47b45ba.jpeghttps://feddit.nu/pictrs/image/2caade00-ef00-475e-a8cf-df76b59b75a5.jpeg

Zip2 ,

I’ll admit I’m slightly surprised, I’d have bet money on that not being the case! Live and learn :)

It could be dirt on the rear element of the lens. It would be worth getting yourself a blower and other equipment to clean your lens with.

hanke OP ,

I did use a fresh piece of paper to clean both sides of the lens, so that is not the problem.

Also, I can see a particle of some sort suspended inside the lens.

superkret ,

Opening up the aperture will make dust on the sensor much less noticeable, too.

hanke OP ,

Really? I mean… If the dust is on the sensor… Does it matter what aperture I use?

superkret ,

Yes. I don’t know exactly why, but I’ve been shooting digitally for 15 years and have dealt with sensor dust a lot.
I’d first clean the sensor with a swab and cleaning fluid, then test again before you do anything to the lens.

hanke OP ,

See this comment: feddit.nu/comment/2022536

I think we just confirmed that the error is in the lens.

superkret ,

No. Without a lens on, the picture is completely unfocused, so any dust spot will be “spread out” over the entire picture and not be visible.

hanke OP ,

Oh okay. Are there any more troubleshooting steps I can take to test this further, or is the sensor cleaning kit the next step?

superkret ,

You can see where on the picture your dust spots are, so compare that to where in the lens you saw dust. Does it correspond?

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