Is this dust on the sensor

So I made a DIY pinhole lens for my 5DmkII. Since the aperture is essentially stopped WAY down, I am able to see dust on the sensor (I think). Are these black spots dust on my sensor? They have shown up in any picture until now.

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I think its a dust on the rear end of the lense..

BlackClouds wrote in post #12270311
I think its a dust on the rear end of the lense..

The lens is a pinhole

Bob_A wrote in post #12270331
The lens is a pinhole

+1 There's dust in the hole.

Yes, it is dust specks on your sensor. Time for a wet clean!
...Terry

Looks pretty dark for dust.. i'd be willing to bet it's a couple specks of metal(from lens mount). Be super-careful if you go to clean it!

I would Agree it's to dark just to be dust. I had dust on mine it showed up as light gray spots. Be extremly careful cleaning the sensor.

I think the equivalent f-stop of the pinhole (f/256 or smaller) would make the dust specks appear this clear. The more you stop down the lens, the more the dust bunnies appear.
Do a dust check with a normal lens and compare.
...Terry

Doesn't look like any sensor dust I've ever seen. Sensor dust usually shows up as light gray dots.

You probably can't see any dust at f/4 (unless they are very large), they show up more at f/16 and are darker at f/32. So I think they will be even more visible at the very small f-stop of a pinhole. I still think if a normal lens was used and a dust test was done, the dust will be seen in the same positions, but show up as light gray spots.
...Terry

Well, hopefully for OP's sake, you're right Terry.