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rafal886

macrumors regular
Original poster
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I bought a brand new iPhone 17 pro and i noticed a small speck of dust in front camera lens. Would you replace it? It's only visible in bright sunlight. The rest of phone is perfect. In normal condition i can’t see it, only outside in bright sunliht. 1 speck is At the top
 
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You would be shocked at how well lenses still perform despite dust inside them. Intuitively, it’s obvious that something right there in front of everything should be a big problem, right? But Newtonian optics is far from intuitive; the math actually says that that sort of thing is effectively invisible, quite possibly literally too small to measure.

If you have morbid curiosity, it shouldn’t be hard to find examples of DSLR images taken in various states of damage. In general, a significant fraction of the cross-section of the lens needs to be affected before it becomes noticeable short of careful inspection.

A noteworthy caveat: misalignment, on the other hand … doesn’t take much for things to get really bad really quickly. When a lens takes a hit, it’s generally misalignment that degrades the image quality, not visible nicks.

Also: dust on the sensor itself (as opposed to in or on a lens) can be apparent as a dark spot basically identical to the spec of dust. Manufacturers have for decades developed increasingly sophisticated means of addressing the problem such that it’s also mostly a non-issue in practice today. About the only time it’s typically noticeable is in images of a large uniform subject at smaller apertures … such as a clear blue sky on a sunny day.

But, in general, if you don’t see anything amiss in your images, there’s (practically by definition) nothing amiss in the camera system.

b&
 
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The camera works very well, and the dust does not affect its performance. The only issue is that my brain tends to focus on that dust — when I’m outside, I notice it immediately and it annoys me.
 
Return it before it consumes you, drives you mad, and you end up in an insane asylum yelling about the dust particles coming to get you.
 
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My last 3 Pro's 15, 16, 17 all had a small spec of dust. It's only visible in direct sunlight or bright light. I don't even care at this point. It seems to be a normal occurrence.
 
My last 3 Pro's 15, 16, 17 all had a small spec of dust. It's only visible in direct sunlight or bright light. I don't even care at this point. It seems to be a normal occurrence.
In front or in back? In back i also have one speck of dust but i don’t care
Because I don’t really see it on the back. But I look at the front of the phone every day. At home it’s not visible at all, but outside in direct sunlight it becomes noticeable
 
In front or in back? In back i also have one speck of dust but i don’t care
Because I don’t really see it on the back. But I look at the front of the phone every day. At home it’s not visible at all, but outside in direct sunlight it becomes noticeable
The front.
 
I bought a brand new iPhone 17 pro and i noticed a small speck of dust in front camera lens. Would you replace it?

The effect is indirect; it contributes to flair. A ton of dust would create lots of flair and would be unacceptable, but, one speck is an aesthetic problem. Which might or might not be a problem for you. No guarantee there isn't a speck in every replacement phone, now that you are sensitive to the phenomenon.
 
Three phones in a row and each had dust in the front camera — that’s either bad luck or it means a lot of units have this issue. And these were different generations too. Until now, I don’t think I’ve ever had dust in the front camera, and I’m pretty sensitive to dust in lenses. I’ve seen it in rear cameras before, but never in the front one.





I can only notice it outside in direct sunlight or on a bright day, but once your brain spots it, it’s hard to ignore 😀 Maybe you’re right that now that I know where to look, the next one could have the same issue — or something else entirely.





So now I’m wondering what percentage of units actually have this kind of dust in the front camera. The dust is outside the lens, so it doesn’t cause any flare — it’s really just an aesthetic issue. I can ignore it on the back since I don’t look at it often, but on the front I tend to focus on it
 
I checked my iPad and MacBook and also have dust in front camera but i’m not worry about it, because i not use MacBook or iPad outside.
 
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