Camera: A History of Photography from Daguerreotype to Digital

The First Photo Model in the World

Tips on Toy Photography (Action Figure)

6 Reasons Why You Have to Buy External Flash

Canon DSLR Picture Style: Free Download Kevin Wang Picture Style

Tips in Choosing Photographic Equipment

Understanding the Codes on Canon Lens

Point of Interest in Photography : Small Objects with Big Impacts!

White Box and Standard Box Canon Lens, What is the Difference?

Wedding Photography Tips

Understanding GN Value and how it’s Calculated

Posted by oneslidephotogaraphy On March - 15 - 2018

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 in photography at

Photography PDF: Digital Portrait Photography For Dummies

Portrait photography is not rocket science. Photographers have been capturing portraits of people since cameras were invented. When you create a portrait of someone, your goal is to create a likeness of the person at his best. But how do you capture a portrait of someone at his best when he’s camera shy, for instance?

Photography Tips: Photographing with Backlight

Essentially, the main idea of photography is playing with light. If we are able play with light and control how it bounces off the subject, it will of course make for a great photograph. If we made mistakes in lighting, it will surely hurt the result. The direction of light against the subject of the […]

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 […]

10 Things You Should do to Prepare for Strobist Photography

Over the last couple of years the term strobist has become increasingly popular in the world of amateur photography. A strobist is a photographer who uses off-camera flash (OCF) to take pictures. Instead of the usual pop-up flash or speedlight attached on top of the camera, strobists use OCF to achieve more pleasing and more […]

Basic FAQ for Amateur Photographers: Part 2

1.With a limited budget, what camera should I buy? If you’re working with a budget of under $500, buy a pocket (point-and-shoot) camera that has Manual Settings feature. This feature will help acquaint you with Speed and Aperture. Be confident in buying a pocket camera; because the price tag of the camera doesn’t accommodate best […]

Li Wei Photography – Work Scene

Li Wei is a well-known photographer. His imagination knows no limits and his works of art are truly amazing, some even disturbing, but none of the less spectacular and different. Only by looking at Li Wei’s photos you get sucked in a world of fantasy and unlimited possibilities.The contemporary artist Li Wei defies gravity by […]

Useful Tips About DSLR Memory Cards

Besides the camera, a memory card is one of the vital component in photographing. That’s why it’s important to be careful in your handling of your memory card to ensure the safety of your data and memory card chip. The following are a few tips to care for and keep your memory cards healthy and […]