Photography Tips: How to Safely Travel with your DSLR & Photography Gear

Tips to Keep Your DSLR Battery Last Longer

Canon 50mm f/1.8 vs. Canon 40mm f/2.8STM  Which One is Better?

How to Choosing, Using, and Caring DSLR Filters

Photoshop tips: Selective Color Photography

6 Guides to Choose the Best DSLR Lens

What is Back and Front Focus Lens?

Common Mistakes in Cleaning a Camera or Lens

Downlod PDF : Model Poses for Great Photographs

The Digital Photography Book  by Scott Kelby

Understanding GN Value and how it’s Calculated

Posted by oneslidephotogaraphy On July - 15 - 2021

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

Tips in Choosing a Camera Phone

When choosing a camera phone, many assume that a good quality camera that produces good quality photographs are the ones with the largest mega pixel (MP). Fact is, the value of the mega pixel a camera phone isn’t the most important aspect, and doesn’t automatically produce the highest quality photograph. The mega pixels is only […]


Funny Photography things: Kids React to Old Camera

Smartphone camera, DSLR, Instagram are hardly new things for kids in this era. Most of them in their teens know and are able to use them. But what happens when they are handed a point and shot camera that is quite outdated and rustic since it was a high-tech camera around the 98’s. How they […]


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 […]


Common Mistakes in Cleaning a Camera or Lens

A camera is, of course, an essential asset to a photographer. To protect said asset, regular maintenance is necessary. But there are many novice photographers who does the opposite in the name of maintenance. Instead of keeping it at tip top shape, they end up unknowingly damage their valuable camera. What are the do’s and […]


Understanding the Codes on Canon Lens

As a rookie photographer who just learn about photography those codes written on the lens of your camera can be very confusing. There are some explanations on those written codes on canon lens here. EF-S EF here stands for “Electro focus”, while the S stands for “Small Image Circle”. It is called so because this […]


Don’t be Sad..Here We are With Some Tips on Making Your Selfie Look More Attractive

For a teenager named Danny Bowman (19 years old), it was neither drugs nor video game that got him addicted but selfie or self-portrait photograph. It got ugly when he failed taking a perfect photo of himself and got frustrated then attempted a suicide. It was all started when Bowman posted his selfie on Facebook […]


The Exposure Triangle of Photography

The key to obtaining ideal photographs depends on the exposure triangle of photography. The exposure triangle consists of aperture, shutter speed, and ISO. The combination of the three determines how dark or bright the resulting photo will be. APERTURE Aperture is the opening in the lens where light enters. If the opening is large, ample […]