Crop Factor
Dec 12, 2013 11:06:53 #
I realize that my camera has a 1.5 factor that makes the 200mm setting on my 18-200 lens act as a 300mm equivalent.
Question: Does that mean that I get the same magnification in the image as if I used a 300mm lens? Or, would the image appear closer if I actually did use a 300mm lens?
Question: Does that mean that I get the same magnification in the image as if I used a 300mm lens? Or, would the image appear closer if I actually did use a 300mm lens?
Dec 12, 2013 11:12:19 #
The crop factor occours because of the size of your sensor. It will affect any lense you attach to the camera.
Dec 12, 2013 11:18:25 #
Crop factor http://en.wikipedia.org/wiki/Crop_factor
Field of view & crop factor explained http://www.youtube.com/watch?v=sYMhhb5QlO0
Field of view & crop factor explained http://www.youtube.com/watch?v=sYMhhb5QlO0
Dec 12, 2013 11:20:04 #
cruizer wrote:
I realize that my camera has a 1.5 factor that makes the 200mm setting on my 18-200 lens act as a 300mm equivalent.
Question: Does that mean that I get the same magnification in the image as if I used a 300mm lens? Or, would the image appear closer if I actually did use a 300mm lens?
Question: Does that mean that I get the same magnification in the image as if I used a 300mm lens? Or, would the image appear closer if I actually did use a 300mm lens?
Yes.
No.
Dec 12, 2013 11:21:50 #
cruizer wrote:
I realize that my camera has a 1.5 factor that makes the 200mm setting on my 18-200 lens act as a 300mm equivalent.
Question: Does that mean that I get the same magnification in the image as if I used a 300mm lens? Or, would the image appear closer if I actually did use a 300mm lens?
Question: Does that mean that I get the same magnification in the image as if I used a 300mm lens? Or, would the image appear closer if I actually did use a 300mm lens?
There is no magnification. There is only a different angle of view.
Dec 12, 2013 11:24:26 #
DX lenses are the actual focal length marked when mounted on a DX sensor. When they are mounted on a full frame body/sensor they do not fill the sensor. The crop factor relates to (in Nikon) a G lens as it was designed to fill a 35mm sensor size. The crop factor simply means that a 50 mm lens made for film or full frame will give you an image that has an effective focal length of 85mm on a full frame camera when used on a DX. The crop factor relates mainly to us old film heads as we view a scene and we judge what we need. If you never had that mental reference it really means nothing to you. It is what it is.
Dec 12, 2013 11:25:19 #
Keep in mind that although the apparent magnification is affected by 1.5 times by using the lens on a crop sensor, the perspective is not affected at all.
The way things appear in a 200mm lens on a full frame is identical to the way they appear on a crop sensor. You just see less of the image on the crop sensor.
The way things appear in a 200mm lens on a full frame is identical to the way they appear on a crop sensor. You just see less of the image on the crop sensor.
Dec 12, 2013 11:28:58 #
brucewells wrote:
There is no magnification. There is only a different angle of view.
The angle of view provides no magnification but it comes in when you view or print the image at the same size as without crop.
So for all practical purposes there is magnification.
Dec 12, 2013 11:34:55 #
Dec 12, 2013 11:42:24 #
jbmauser wrote:
DX lenses are the actual focal length marked when mounted on a DX sensor. When they are mounted on a full frame body/sensor they do not fill the sensor...
A common misconception. Many or most do fill the FX sensor area, some with varying degrees of vignetting. They are optimized to give the best image on the DX sensor area.
For example I can use my DX lenses on my FX Nikon in any of four image areas from DX to FX. All work over the full range using the DX area, of course. Some work over a limited range on the full FX area; e.g. my 10-24 shows no vignetting above 18mm. Most work fine in the 1.2 crop or 8x10 mode over most of their range. f-stop can also affect this.
You need to test to know.
Dec 12, 2013 11:47:02 #
Thanks...this definitely helps understand this. So, if I compared the same specific area of an image between a DX and FX sensor there would be no actual magnification of that area. It only appears magnified because of the cropping. Correct?
Dec 12, 2013 11:48:24 #
cruizer wrote:
Thanks...this definitely helps understand this. So, if I compared the same specific area of an image between a DX and FX sensor there would be no actual magnification of that area. It only appears magnified because of the cropping. Correct?
Yes
Dec 13, 2013 07:06:55 #
cruizer wrote:
I realize that my camera has a 1.5 factor that makes the 200mm setting on my 18-200 lens act as a 300mm equivalent.
Question: Does that mean that I get the same magnification in the image as if I used a 300mm lens? Or, would the image appear closer if I actually did use a 300mm lens?
Question: Does that mean that I get the same magnification in the image as if I used a 300mm lens? Or, would the image appear closer if I actually did use a 300mm lens?
One thing I've found is that 300mm is not 300mm. I've taken the same shot with different lenses set to the same focal length, and I've gotten a different angle of view with each.
Dec 13, 2013 09:09:36 #
Dec 13, 2013 09:12:03 #
cruizer wrote:
I realize that my camera has a 1.5 factor that makes the 200mm setting on my 18-200 lens act as a 300mm equivalent.
Question: Does that mean that I get the same magnification in the image as if I used a 300mm lens? Or, would the image appear closer if I actually did use a 300mm lens?
Question: Does that mean that I get the same magnification in the image as if I used a 300mm lens? Or, would the image appear closer if I actually did use a 300mm lens?
Take a look at this site.
http://imaging.nikon.com/lineup/lens/simulator/
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