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Stopping down a lens to check for sensor dust

Started by Bharat Varma, March 19, 2024, 12:11:21 AM

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Bharat Varma

Ever wonder just why you needed to stop down a lens to check for dust on the camera sensor?

Here's a very concise explanation with an excellent graphic to go with it.


https://www.cambridgeincolour.com/tutorials/camera-sensor-cleaning.html
Looking for a Rokinon/Samyang 135 F/2 Lens in excellent condition.

Also looking for a few Canon NB-10L Batteries.

Thad E Ginathom

Quote from: Bharat Varma on March 19, 2024, 12:11:21 AMEver wonder just why you needed to stop down a lens to check for dust on the camera sensor?

No. But now you come to mention it, I haven't a clue!

Sadly, the link is giving a page-not-found.

Bharat Varma

Sorry, try now. Just corrected the link.
Looking for a Rokinon/Samyang 135 F/2 Lens in excellent condition.

Also looking for a few Canon NB-10L Batteries.

Krish Chandran

#3
Very informative and helpful. Thanks for sharing.

Not so long ago I moved to the mirrorless system and within a few months of usage I noticed sensor dust. Sensors of mirrorless cameras are positioned further out and the opening that houses the lens is significantly larger than it used to be for DSLRs.

I opted to clean the sensor myself using a VSGO kit  They have detailed instructions for usage and it worked flawlessly. I am very happy with the outcome. There are many YouTube videos explaining how this is done. I watched a few before I took the plunge.

There are different sizes for full-frame, APSC and M4/3, so be sure to order the correct one for your use-case.
"The more you learn, the more there is still left to learn"
Andy Mumford

https://flickr.com/photos/195860685@N07/
https://youtube.com/@krishchandran4125?si=5BIxPdEyRL4Nj3BI

Thad E Ginathom

Quote from: Krish Chandran on March 19, 2024, 09:03:17 AMopted to clean the sensor myself using a VSGO kit 

Yes, it is not difficult, nor is it anything like as scary as it looks. But it should not be the first line of cleaning for simple dust. First, try to blow that away.

Last time I did a wet clean, after doing the sensor, I cut the swab down and used it on the EVF.

(Reminder to self... I do have to buy an FF-size kit for my new[ish] camera.)