Reply to thread

Message

<blockquote data-quote="STM" data-source="post: 154117" data-attributes="member: 12827">Firstly, the printing on the back cover of a magazine is far from critical enough to be trusted to be neutral gray. I suggest you go to a camera store and spend $10 on a Kodak 18% gray card or order one online. Also, the reason your white background is turning out gray is due something called the &quot;inverse square law&quot;. In photography, the inverse square law means that when you double the distance from a light source, you reduce the light by the distance SQUARED. In other words, when you double the distance of an object, in this case your background, you reduce the amount of light received squared.&nbsp; That means that it is 2[SUP]2[/SUP] or 0.5[SUP]2[/SUP] or 1/4[SUP]th[/SUP] the light, which equals 2 stops. That is why your &quot;white&quot; background actually appears gray. In a light tent, this distance does not need to be much. If you want a white background you need to ensure you are lighting your background as well as your subject.</blockquote>

[QUOTE="STM, post: 154117, member: 12827"] Firstly, the printing on the back cover of a magazine is [I]far[/I] from critical enough to be trusted to be neutral gray. I suggest you go to a camera store and spend $10 on a Kodak 18% gray card or order one online. Also, the reason your white background is turning out gray is due something called the "inverse square law". In photography, the inverse square law means that when you double the distance from a light source, you reduce the light by the distance SQUARED. In other words, when you double the distance of an object, in this case your background, you reduce the amount of light received squared. That means that it is 2[SUP]2[/SUP] or 0.5[SUP]2[/SUP] or [I]1/4[SUP]th[/SUP] the light[/I], which equals 2 stops. That is why your "white" background actually appears gray. In a light tent, this distance does not need to be much. If you want a white background you need to ensure you are lighting your [I]background[/I] as well as your subject. [/QUOTE]

Verification