In Photography, Timing is Everything!

How to Choosing, Using, and Caring DSLR Filters

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

Digital SLR Photography All-in-One For Dummies

Creating Unusual Bokeh With Your Fingers

5 Common Rookie Mistakes when Buying a Camera

Tips for Shooting Macro Photographs of Insects

Pre-wedding Photography Tips

Beginner’s Guide to Directing Photo Models

Don’t Delete Your Digital Photography Mistakes Too Fast!

Understanding GN Value and how it’s Calculated

Posted by oneslidephotogaraphy On December - 21 - 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 what is guide number at OneSlidePhotography.com

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 […]


Post-Mortem Photography: Using the Dead as Photo Models

There’s a unique art style of photography during the Victorian era, the photography of the dead! This photography styling is known as post-mortem photography and was very popular around the end of the 19th century. The main models of this art were human corpses whose families want to immortalize in the form of a photo, […]


Tips on becoming a Professional Photographer

The world of photography has advanced rapidly, especially in today’s digital era. And of course, the chance of becoming a professional photographer hasn’t faded. Below I will give a few tips for those who want to join the world of photography, and of course every one has their own reasons for becoming a professional photographer: […]


Which Lens should I Buy Next?

Someone who’s just freshly delved into the world of photography by buying a DSLR with a kit lens will have this question resonating in their thoughts as they go deeper into the rabbit hole of photography. Whether it is for the sake of having a ranged collection of lenses or the desire to widen their […]


Best DSLR Lens : 50mm Lens Is The Must Have Lens In Your Camera Bag

Focal length of 50mm is popular because the field of view that’s in focus is approximately what you see in the real world. There is no distortion of space like in ultra wide angle lens, and it is not compressed like telephoto lens.Therefore, focal length of 50mm is also an honest lens. Because it does […]


Photographer’s worst case scenarios

As a photographer, whether it be as an amateur or a professional, you’ve probably experienced difficulties and failures in your work. With preparation and experience, it may well be avoided. What are these worst case scenarios that photographers need to prepare for? The following are several examples of cases and how to avoid these worst […]


Nikon D5100 vs Nikon D5000

The arrival of the D5100 appears to signal the completion of Nikons refresh of its non-pro DSLR lineup. Nikon’s latest DSLR is official, the D5100, promising Full HD video recording, 16.2-megapixel stills, and fancy features like in-camera HDR photography, ISO 102,400 for extreme low-light shots, and effects like selective color sampling. The Nikon D5100 also […]