crwdns2933423:0crwdne2933423:0

crwdns2933803:03crwdne2933803:0

crwdns2933797:0Maggiecrwdnd2933797:0crwdne2933797:0

crwdns2936043:0crwdne2936043:0 crwdns2933505:0crwdne2933505:0 Maggie

crwdns2933769:0crwdne2933769:0
crwdns2933771:0crwdne2933771:0
crwdns2933801:0crwdne2933801:0

crwdns2933807:0crwdne2933807:0

[* black] Then you need to turn the wave wheel at the handle of the camera body.
[* black] You need to make the aperture smaller, so you need to turn the wave to the right.
[* black] Specify the F value to 16 (remember, the larger the aperture, the smaller the F number)
+[* black] To test the dust level, you need to press the shutter against a white wall or any white background.
+[* black] After you take a picture, if your camera sensor has dust, the picture is stained (the meaning of this step is to confirm the location of the stain)