Now Available!
MAVEN FILTERS - Color-Coded Magnetic Photography Filters
(Circular Polarizers, UV, ND Filters, Step-Up Rings, and more)
https://www.mavenfilters.com
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Many Canon 90D owners have complained that their images are not quite as sharp using the optical viewfinder as they are in Live View.  The cereal box and ruler method allow photographers to visualize where their lenses are focusing and verify if they are out of alignment. This video demonstrates the philosophies of MFA (micro focus adjustment) and some of the principles to become familiar with if you decide to try this on your own. I think learning how to do this manually is a good exercise because sometimes you may need to make an adjustment and not have access to certain tools.
I did decide to keep my micro-focused adjustment at -15 simply because I was getting better peak sharpness at that point.
It may appear that the Live View focus is off. A couple notes: MFA doesn't change Live View focusing, Im wayyyyy zoomed in, and finally, it is normal for cameras to focus towards the front of the DOF.
If you haven't seen it already, please check out the 5 focusing tips before trying MFA: https://youtu.be/6Kq3ESNQbgY
If you like my teaching style, check out my training videos on specific cameras:
Michael’s "Everything Else Crash Course"
This course is jam-packed with lessons to help you take your photography to the next level. The topics covered in this course deal with the Photography Core, Composition, Lighting, Portraits, Digital Basics, Video Shooting, Audio Recording & Clean Up, Intro To Strobes, Planning & Trouble Shooting, & Real World Shooting.
https://www.maventutorials.com/collections/all/products/everything-else-crash-course
Michael’s Training Videos:
https://www.canontrainingvideo.com
Michael’s Maven Straps:
https://www.amazon.com/dp/B07MVXKCHW?ref=myi_title_dp&th=1