The 365-day Project by Andrew Whyte: The Legographer

Everyone Can Be a Good Photographer!

Don’t Delete Your Digital Photography Mistakes Too Fast!

Should you Upgrade Your Camera First or your Lens?

Image Stabilizer, Is It Required or Not?

10 Things You Should do to Prepare for Strobist Photography

Inspiring Story: Rusidah, an Armless Photographer

Download: EOS 550D User’s Guide

Download: Canon EOS 5D User’s Manual

Knowing More About Telephoto Lens

Understanding GN Value and how it’s Calculated

Posted by oneslidephotogaraphy On February - 18 - 2016

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 GN value at OneSlidePhotography.com

The Importance of Empty Space In a Photograph

Almost in every picture we must see an empty space. That empty space is there for a reason, because emptiness is not always meaningless. Empty space can be very beneficial in adding aesthetic effect on a picture but on the other hand, it can also ruin the beauty of it. Yet it is definitely one […]


Rule of Third

The “Rule of Thirds” one of the first things that budding digital photographers learn about in classes on photography and rightly so as it is the basis for well balanced and interesting shots. The rule of thirds is a compositional rule of thumb in visual arts such as painting, photography and design. The rule states […]


Tips to Keep the Lens Rear Cap and the Body Cap of Your Camera Safe

What do we often do when we take the camera out of its case? We usually open the body cap from the front body of the camera and open the lens rear cap from the back end of the lens. At that point of time, unknowingly we touch two things which can be the main […]


The Dreamy Camera Café, a Café For Photographer

The following is a very special café which is really like no other. This unique cafe is located six miles to the east of South Korea in Yangpyeon district. Customers may drive on their own cars in order to reach the location or take a train from Seoul. Though the distance is quite far, yet […]


How to Achieve a Levitation Photograph using Adobe Photoshop

Levitation is a currently trending style of photography, one of the pioneers being the Japanese photographer Natsumi Hayashi. The technique is really quite simple. All you need is jump up, and have the photograph taken as the subject is in mid air. Besides the jump style, what must be paid attention to is the expression […]


Food Photography Tutorials

Food photography is a great way to get started with photographing still life.A great food photograph can convey feelings of warmth, awaken fond memories, conjure up fantasies, or just plain make you hungry. With opportunities to shoot literally hundreds of different subjects, you can create lots of different looks fairly easily. And the biggest bonus? […]


Downlod PDF : Model Poses for Great Photographs

People photography is always popular, as evidenced by the millions of faces, arms, legs and muscles gracing the pages of magazines, billboards and grandma’s brag book. In todays highly competitive modeling world one of the key factors that successful models must have is a clear understanding of how to pose for the camera. Every model […]