Posts Tagged ‘distance’

Zone Focusing: How to Use Those Markings On Your Lens You Might Have Never Used Before

You’ll seen all those markings on lenses, but do you know what all of them are there for? Some of you might, but for those who don’t or are looking for a refresher, YouTube user Tim Heubeck has put together a quick little how-to that introduces you to the numbers on the front of the lens that are used for zone focusing — a method of focusing that’s particularly useful in street photography. Read more…

Don’t Zoom, Move: Treating Your Zoom Lens as a Series of Primes

We’ve shared some funny pictures in the past that illustrate how distance, not focal length, changes perspective — but nothing beats a video walk through. So, in this short video, photographer Mike Browne explains why you should treat your zoom lens as a series of prime lenses, and not the equivalent of getting physically closer to your subject. Read more…

How Focal Length and Subject Distance Affect Weight… As Seen with a Cat

catfocallengths

We’ve written a couple of times in the past on how you can achieve drastically different portrait looks by choosing different lens focal lengths and subject distances. Basically, your choice of glass can make a huge impact on what your subject’s face looks like… and how much they appear to weigh.

Reddit user Popocuffs wanted to demonstrate this, but instead of using a human subject, he used his cat.
Read more…

Jumping Spiders’ Eyes May Inspire New Camera Technologies

In a paper published in Science this week, Japanese researchers reported on a discovery that jumping spiders use a method for gauging distance called “image defocus”, which no other living organism is known to use. Rather than use focusing and stereoscopic vision like humans or head-wobbling motion parallax like birds, the spiders have two green-detecting layers in their eyes — one in focus and one not. By comparing the two, the spiders can determine the distance from objects. Scientists discovered that bathing spiders in pure red light “breaks” their distance measuring ability.
Read more…