WOW! new way to find all the dirt on the sensor

I bought a pinhole cap for the fun of it last week. And I have never seen so much dirt on the sensor in the image! F/16...F/22 at a white wall will show your dirty sensor.... But a pinhole is F/super-tiny and O My God does it show the dirt!!!!!

I spent a half hour after that, trying to clean the sensor and could not get it clean. I have never even considered getting a professional sensor cleaning.... but this cap has made me schedule an appointment for the morning.

If you have never used a pinhole cap, and have a bit of OCD for a clean sensor. I suggest NEVER using a pinhole cap. This is fair warning!

Interesting. Would be good to see a 'before' and 'after' pic.

I should have saved a few! I deleted them as they were shot just playing around with the cap in my office.

They are indeed very good at showing dust on the sensor.

It makes sense. All a pinhole camera is doing is increasing the f/stop by a lot depending on the size of the pinhole. A perfect pinhole camera would have in an infinite f-stop and infinite DOF.