GN In Photography | Photography tips and tricks, Equipment, Photography News, Photography Books, Tutorial, and Lighting

Understanding GN Value and how it’s Calculated

Posted by oneslidephotogaraphy On October - 10 - 2020

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 GN in photography at OneSlidePhotography.com

Beware of Condensation on your Camera or Lens

Have you ever find your camera lens fogged after being in a cold area? Like when you’re taking a trip to the mountains or when you get out of an air conditioned vehicle? This won’t be a problem for you if the fogging only occurs on the outside of the lens. But if the fogging […]

Easy and Practical Tips for Models Photo Shoot

One of the most fun activities in photography is model shoot, especially for guys. It cannot be denied that the models’ captivating beauty and great curvy body can make the photographer lost in their world. Though it seems easy, model shoot has its own challenge like how we direct the model to act certain pose, […]

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 […]

Children Photography Tips and Trick

Children can be captured on camera successfully in many different circumstances and locations. When photographing children you’ve got to keep it moving, make it fun and yield to their character. For most children, getting their photograph taken is fun and they will perform for the photographer. This in turn brings their personality to life on […]

Understanding Codes on DSLR Camera Lenses

As we first enter the world of DSLR cameras, one of the confusing aspects is trying to translate the meaning in lens labels. In this entry, I would like to explain the various models of lenses and what that entails. For this entry, I will use Canon lenses as the case study. – Canon EF-S […]

Bokeh Photography Techniques

Bokeh describes the rendition of out-of-focus points of light. Bokeh comes from the Japanese word ‘boke’, which means fuzzy. In photography, bokeh defines the quality of the blurred lights presented in a photo. We’re not referring to a badly taken photo that’s all out of focus, but rather the aesthetically pleasing background blur. Usually, this […]

Photographer or Photoshopper?

Photography consists of the ancient Greek words “photos” meaning “light” and “graphein” meaning “draw/graph”. So essentially, photography is the practice of drawing with light. So if we’re too dependent on photo-editing programs (such as Photoshop) to create a good photograph, then do we still deserve to be called photographers? Here are some statements as food […]