How To Calculate Guide Number | Photography tips and tricks, Equipment, Photography News, Photography Books, Tutorial, and Lighting

Understanding GN Value and how it’s Calculated

Posted by oneslidephotogaraphy On March - 15 - 2018

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 »

Beginner's Guide to Photography, Photography Equipment

Related Photography Ideas for how to calculate guide number at OneSlidePhotography.com

Tips in Photographing Faces with “Unflattering” Features

There come times when we are asked to photograph friends and passersby, and they may have a distinct “unflattering” features about them (this may be in the form of a flat nose, chubby cheeks, oversized ears, and so on). We may be doing them a favor and may even make their day if we shoot […]

6 Tips For Your First Little Steps To Become A Professional Photography

Becoming a professional photographer is not something you can do overnight. It takes a lot of practice and learning. The mastery of instruments, the ability to visualize ideas and also patience to wait the right moments are the keys to success in becoming a great photographer. There are 6 important tips that you can learn […]

7 Tips for Photojournalism from Reuters Photographer Damir Sagolj

Damir Sagolj is a Reuters photographer from Sarajevo based in Thailand. In the following video, he shares 7 tips regarding photojournalism. Here are the 7 photojournalism tips as discussed by Damir in the above video: 1. Anticipation You must always anticipate the coming of that important, picture perfect moment. How? When on location, don’t just […]

The First Photo Model in the World

Here’s the world’s first photo model, or the first ever person to be photographed with a camera. Want to know how the person who was dubbed the first photo model looks like? The answer is in the photograph above. The University of Rochester gave an award for the making of this first photograph of a […]

The Greatest Photographers Along With Their Legendary Masterpieces

For some people, these names may sound unfamiliar. However, when you see their works or the images they created, you may say that you know them. For instance, when you see the “bliss” image with the carpet of lush green grapevine’s farm with a clear blue sky, you must know that it is the default […]

Photography Tips: Photographing Family Events, Groups and Weddings

The most common events that you would be documenting when you’re into photography would be your family events, Groups and weddings. Creating memorable wedding and family event photos aren’t difficult, as long as it’s planned and organized accordingly. Here are some tips to get you going:

Download: EOS 550D User’s Guide

There are currently only four manufacturers producing APS-C format digital SLRs. In order of their respective market shares they are Canon, Nikon, Sony and Pentax. While Pentax seems content to plod along with its two percent share of the market and its small but excellent range of entry-level and semi-pro models, the other three brands […]