Mystified by talk of “guide number” and “flash power”? Gerald Undone made this helpful 10-minute video that explains everything you need to know about the light from strobes and speedlights, from common misconceptions to practical formulas that will help you light your shots.
There is a lot of misunderstanding and confusion on the subjects of depth of field, the difference between full-frame and crop sensors, and the ‘crop factor. ’ Time and time again I see arguments surface over these topics—in YouTube comments and on camera forums.
When it comes to printing your images and that elusive DPI (dots per inch) number, the ultimate question is: “how big is big enough?” Whether you’re exporting for billboards, magazines, or fine art prints, this video explains what DPI you should be using and why.