Electromagnetic Focusing

It’s a marvel how today’s lenses and cameras achieve auto-focusing, some better than others, of course. A lot goes into these designs. If you grew up with manual focus lenses, you may recall how some were easier to use with smoother movements. A sticky focusing lens was garbage, even if its optical elements were good, right?

LensRentals posted on their blog a discussion of how lens designers have implemented different approaches to non-manual focusing or, focusing with electromagnetic motors. You know you have one of these because you can turn the focusing ring without getting that tactile feedback that the older manual lenses gave.

So, who’s up to taking your lenses apart to see what you have? 😉

No! No! No! …just kidding.


About rcdanek

Photography, Video, Music, Engineering, and Family
This entry was posted in FYI, Technology and Gear. Bookmark the permalink.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )


Connecting to %s