## Tutorial: How to Pick the Best Focal Length When Capturing Landscapes

Put together by photographer Steve Perry, the video tutorial above shares a collection of useful tips, advice and examples that help explain how to best think of and use focal lengths when you’re out capturing landscape photography. Read more…

## A Concise Explanation of How Crop Factor Affects Both Focal Length AND Aperture

Editor’s Note: Due to some issues with the camera, this video is very shaky at times. It didn’t bother us much, but if you’re easily distracted this video might annoy more than it educates you. You’ve been warned.

If you’re just getting into the world of cameras and lenses, the term “crop factor” and phrases like “this is a 35mm equivalent lens” might still confuse you. Well, that shouldn’t be the case much longer.

The video above offers a clear, concise and simple explanation of crop factor that will hopefully clear all of this up and equip you with some important knowledge that will come in handy the next time you’re shopping for a lens or crop sensor body. Read more…

## Tamron Has a Shiny New 150-600mm Lens in the Works, Will be Its Longest Zoom Yet

Here’s a little gear porn to keep your G.A.S. revving this Thursday. Japanese lens manufacturer Tamron has officially announced that it is working on a 150-600mm f/5-6.3 ultra-telephoto zoom lens that will replace the company’s current 200-500mm lens and become the longest focal length zoom in its lineup. Read more…

## A Mathematical Look at Focal Length and Crop Factor

I’m hoping this post can explain a lot of the confusion beginning photographers have about focal length and crop factors. Some understanding of basic geometry is required for you to fully grasp this post. Also note that I’ll be rounding the math decently well. Just run through the calculations if you want exact answers.

## The Top 8 Reasons Why I’m a Big Believer in 35mm Lens Photography

After two years of testing, renting, buying and selling just about every level of Nikon and Canon lenses and cameras, I have learned quite a bit about what works and what doesn’t. Pretty much you can’t go wrong with Canon or Nikon, and just about everything they make is top notch.

## 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…

## MIOPS: Smartphone Controllable High Speed Camera Trigger

MIOPS is a new smartphone-controlled camera trigger that combines all of the features photographers want in a high-speed camera trigger into one convenient device.

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

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.

## How Focal Length Affects Your Subject’s Weight in Portraits

We’ve shared this same topic here a couple of times before, but Jay P. Morgan of The Slanted Lens created this video lesson showing some examples of how profound of an impact your focal length choice can make.

## What’s the F-number of the Human Eye?

Ever wonder what the f-number of your eyes are? It can easily be calculated using the human eye’s focal length (~22mm) and physical aperture size. Here’s what Wikipedia has to say:

Computing the f-number of the human eye involves computing the physical aperture and focal length of the eye. The pupil can be as large as 6–7 mm wide open, which translates into the maximum physical aperture.

The f-number of the human eye varies from about f/8.3 in a very brightly lit place to about f/2.1 in the dark. The presented maximum f-number has been questioned, as it seems to only match the focal length that assumes outgoing light rays. According to the incoming rays of light (what we actually see), the focal length of the eye is a bit longer, resulting in minimum f-number of f/3.2.

The article also notes that the eye cannot be considered an ordinary air-filled camera since it’s filled with light refracting liquid.

Image credit: eye 172/365 by attila acs

## A Striking Look at How Focal Length Affect Head Shots

You’ve probably heard before that focal lengths between 85mm and 135mm produce the best head shots because they provide a desirable perspective in head shots, but how much of a different does the focal length actually make? Photographer Stephen Eastwood decided to find out, shooting 10 portraits of the same subject with focal lengths ranging from 19mm to 350mm.

Image credits: Photographs by Stephen Eastwood