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One-Shot, AI Focus, AI-Servo

Tablet, Smart Phone, other Internet devices

One-Shot, AI Focus, AI-Servo

Postby blin » Wed May 18, 2016 4:34 pm

One-Shot is probably the most commonly used method and is likely the ‘standard’ setting on your camera. When you press your shutter half way down (or use your AF-ON button instead which I go over in my ebook) the camera sets focus one time and holds that focal distance until the picture is taken. If you’re shooting still life or a subject that simply isn’t moving much then this is a good method to use. You can even go into your settings and make the camera beep when focus is locked so you know it’s good.

The main idea with AI-Focus is that it starts in One-Shot, so you get focus confirmation (which you don't get in AI-Servo), and then it monitors the subject and, if it detects the subject is moving, it switches to AI-Servo and tracks. That's the theory, the practice is sometimes that it doesn't switch to tracking quick enough (or something) and you end up with more out-of-focus shots than you would by using the other modes.

AI-Servo tracks focus on moving subjects so as your subject moves closer or moves further away your camera constantly updates focus to keep the subject as sharp as possible.
How to Configure and Troubleshoot Cisco
http://www.howtocisco.com

Tablet and Smartphone Setup Guide
http://www.quicksetupguide.com
blin
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Re: One-Shot, AI Focus, AI-Servo

Postby blin » Wed May 18, 2016 4:37 pm

The main difference of AI Focus and AI-Servo is that AI-Servo works quite well where-as AI-Focus does not.

The easiest way to remember is: AI Servo works, AI Focus does not. I have never found a body in which AI Focus worked reliably. Best advice is to simply avoid it and stick to One Shot and AI Servo - they both work as advertised.
How to Configure and Troubleshoot Cisco
http://www.howtocisco.com

Tablet and Smartphone Setup Guide
http://www.quicksetupguide.com
blin
Site Admin
 
Posts: 3618
Joined: Wed Dec 31, 1969 7:00 pm
Location: Chicago, USA


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