Nissan 370Z Forum - View Single Post

KillerBee370 · 11-26-2011, 02:24 AM

I don't see any problem purchasing a used DSLR. And a factory demo? Used for what exactly? A DSLR has a "shutter life" so depending on how many times that things been fired that should play in to your decision. Of course it's kinda hard to figure that obviously.

As far as DOF or "depth of field" is concerned, that is largely controlled by your camera. Shallow DOF is typically characterized by heavily blurred backgrounds that you might see in outdoor portraits. DOF is controlled primarily by 3 different factors, the most common of which is the "F stop" or "F number" in an aperture mode or "AP - aperture priority" mode on your camera. (the lower the number, the more blurry the background). Now different lens's will offer you different types of "bokeh" or "blurriness" but it's not the lens itself that controls DOF.

Another factor in DOF is simply the distance of your subject.

Lastly, "focal length" will largely come into play when you are talking about lens's and the ability to shoot different DOF's. A short focal length lens will have a more difficult time achieving a shallow DOF whereas a telephoto lens will accomplish this with ease.

I hope that helps!

11-26-2011, 02:24 AM	#2 (permalink)
KillerBee370 A True Z Fanatic Join Date: Mar 2009 Location: So Cal baby! Age: 51 Posts: 5,964 Drives: with passion Rep Power: 321	I don't see any problem purchasing a used DSLR. And a factory demo? Used for what exactly? A DSLR has a "shutter life" so depending on how many times that things been fired that should play in to your decision. Of course it's kinda hard to figure that obviously. As far as DOF or "depth of field" is concerned, that is largely controlled by your camera. Shallow DOF is typically characterized by heavily blurred backgrounds that you might see in outdoor portraits. DOF is controlled primarily by 3 different factors, the most common of which is the "F stop" or "F number" in an aperture mode or "AP - aperture priority" mode on your camera. (the lower the number, the more blurry the background). Now different lens's will offer you different types of "bokeh" or "blurriness" but it's not the lens itself that controls DOF. Another factor in DOF is simply the distance of your subject. Lastly, "focal length" will largely come into play when you are talking about lens's and the ability to shoot different DOF's. A short focal length lens will have a more difficult time achieving a shallow DOF whereas a telephoto lens will accomplish this with ease. I hope that helps! Last edited by KillerBee370; 11-26-2011 at 02:33 AM.