Wedding Photography Tips

Tips in Choosing a Camera Phone

Difference between the P Mode and the Full Auto Mode in Digital Cameras

How Important are UV Filters in Digital Photography?

What’s the Safest Way of Storing Digital Photograph Files?

Understanding DSLR Lens Sweet Spots and How to Get Them

Street Photography Tips for Dummies

12 Tips for Candid Photography

Tips for Shooting Macro Photographs of Insects

Meaning of Codes on Sigma Lenses

Understanding GN Value and how it’s Calculated

Posted by oneslidephotogaraphy On July - 15 - 2021

How to calculate GN value

How to calculate GN value



GN, short for Guide Number, Is the amount of power the light transmitted by a flash device is. It’s the result from multiplying distance (in meter or feet) and aperture.

The power of the flash is measured with the GN which describes the flash’s capacity in illuminating objects within a certain distance (in meters). Modern flashes supports TLL technology that allows it to set its power according to the distance the object is to the camera, so the risk of it being too bright or too dark can be eliminated. Read the rest of this entry »

.

Related Photography Ideas for what is guide number at OneSlidePhotography.com

High Speed Flash Photography by Chase Jarvis

Chase Jarvis is a well-known photographer in the fields of commercial, fashion, and model photography. He is an American stationed in Seattle, Washington. Aside from photography, he is also known as a beacon in the internet world for making and posting free photography tutorial and tips for those looking to learning the craft. His videos […]


Knowing Types of Memory Card For Digital Camera

If you use digital camera or Smartphone, you must know card memory well. On the previous article, I have covered about some tips on preserving this smart card so it can last long and is always ready to be used anytime. But do you know that there are so many types of memory cards in […]


Nikon Picture Control System

Naturally, you seek to create images that achieve your own desired characteristics — images that project your own particular style. It’s a feeling shared by everyone who loves photographs and loves taking them, professional and amateur alike. With digital cameras, you’re able to control image characteristics such as tone, hue, and contrast — and do […]


What is Shutter Count in Digital Photography?

Undeniably, the advances in the world of photography have rapidly increased since the the more affordable prices of DSLR camera. There are even beginner-class DSLRs that has a price tag In the $500 range. By purchasing a DSLR, a person will have the opportunity to learn more about photography while ensuring quality results in their […]


Tips for Buying Used DSLR Flash

A flash is pretty much a must-have accessory for a photographer. Because photography itself, “Photos-graphein” literally means drawing with light. Without light, there’d be no pictures. Buying a new flash of course isn’t a problem because buying something new doesn’t require the need to for detail checking of its condition. Plus, it usually includes warranty. […]


The Best Lens for Portrait Photography

Many novice photographers ask, “which lens is best for photographing head shots/portraits, and why?” Actually, suitable or not a lens is depends on the needs of the photographer. What you need to familiarize yourself with is actually the characters of the lens you’re using and how it effects the proportions of the object’s face that […]


Creating a Vintage and Lomographic Tone with Toycamera AnalogColor

One of the things photographers do during post process is to adjust tones and colors to produce the desired overall tone of the photograph. There are no concrete standards to producing a certain photographic tone. It all boils down to taste and preference of the photographer. One of my and some of my friends’ favorite […]