Knowing Types of Memory Card For Digital Camera

Is the Google Glass the Future of Mobile Photography?

Image Stabilizer, Is It Required or Not?

What Is Minimum Focus Distance (MFD) On a Camera Lens?

Tips on Shooting at the Blue Hour

Canon EOS Rebel XS/1000D For Dummies

Tips for Buying a New or Used camera/lens

Advantages on Photo-Hunting Alone

Photography Beginners’ Frequently Asked Questions

Photography Pricing Tips

Understanding GN Value and how it’s Calculated

Posted by oneslidephotogaraphy On August - 10 - 2017

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 how to calculate guide number at OneSlidePhotography.com

DOF Preview Button: What it is and How to Use it

When mounting a lens to a DSLR camera body, then peer into the viewfinder, what you’ll see is the image in the lens’ widest aperture settings. Now what if you want to see the image when using the smallest aperture opening straight from the viewfinder in order to get an accurate image of how the […]


Beginner’s Guide to Directing Photo Models

As a photographer, it is sometimes tricky to direct rookie models the way we want to behave and how they should convey their expressions in a certain photo shoot session. Whereas on the contrary, professional models need little directions from the photographer, a description of the theme is all they need to be able to […]


This Camera Returned, after 3 Years Missing at the Bottom of a Muddy Creek

Image credit: Photograph by John Noerr What would you do if your camera and its memory card plunges into a muddy creek during a camping trip? Of course, with a heavy heart, you’ll give the camera up and deem it lost. Even if you’re to be able to find it, it’ll be in a state […]


Photography is General, but Style is Personal

When discussing photography styles, the discussion will center around the unique aspects of each photographer that are apparent in their works.? Why unique? Because each photographs of each photographer is different. Whether it be from the angle the photograph is taken, how they direct their subjects, the lighting techniques they incorporate, or the post processing […]


Tips: Photographing Orchestra Concerts

Concerts are different than other types of musical events due to several of its characteristics. In addition to generally displaying classical music, concerts have aspects that can become constrictive to photograph. The most important thing when it comes to photographing concerts is that the camera can’t be too noisy and the photographer can’t move around […]


Jennifer, The First “Topless” Woman to Get Edited in Photoshop

Photoshop is not an alien thing in the ears of any photographer today. Moreover, along with the development of digital photography, indeed, Photoshop has become the most popular digital imaging software now which can be used to manipulate and fix an image. However, do you know who the first person to get featured on the […]


Why is there a dark spot whenever I shoot?

The same question as the title above is very commonly asked by rookie photographers in photography forums on internet. Why is there dark spot appearing every time I shoot? Actually there are some steps you can do to get rid of such spot from your camera. Follow the steps here: The first thing to be […]