Crop sensor the same as zooming in on Full Frame shot?

1 year 11 months ago #736921 by Rob Conley
Full frame will have more information inside the same frame size as the crop sensor.  Am I understanding that correctly?  


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1 year 11 months ago - 1 year 11 months ago #736932 by db3348
Rob ,

It seems you are not understanding correctly .

Full-frame sensor is literally, physically a larger frame  than a crop sensor frame , so  you are getting more image information,  because it's a larger frame .

 
   

       

    Full-frame sensor  : 36 x 24mm    APS-C Crop sensor :  24 x 16mm   Micro-4/3 crop sensor :  18 x 13.5 mm

(illustrations not to exact scale  but to make the point)

regards

db3348


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1 year 11 months ago #736936 by Ozzie_Traveller
G'day Rob

As db shows above, 1)- the sensor size changes considerably with camera differences, =but= 2)- the viewing angle for the lens that is regarded as 'standard' is the same in each case

ie- the 'standard' lens for FF is 50mm - for APS it is 35mm - and for m4/3 it is 24mm ... all these lenses "see" about a 45 degree wide image, therefore supplying the same stuff to the sensor to be recorded

to go one step further -
a short zoom for FF might be a 24 to 80mm - the APS lens is 18 to 55mm and the m4/3 is 12 to 42mm .... and each will deliver much the same images to their matching sensors

Hope this helps
Phil from the great land Downunder
www.flickr.com/photos/ozzie_traveller/sets/

Phil from the great land Downunder
www.flickr.com/photos/ozzie_traveller/sets/

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1 year 11 months ago - 1 year 11 months ago #736988 by TCav
You should also know that sensor size has an impact on the Depth of Field. For instance, using the 'standard' focal lengths referred to by my friend Phil, a 'Full Frame' camera with a 50mm lens at f/2.0 focused on a subject 25 feet away will have a DoF of about 9.4 feet, while an APS-C camera with a 35mm lens at f/2.0 (to obtain the same exposure) focused on a subject 25 feet away will have a DoF of 13.2 feet, which is about what the 'Full Frame' camera would get at f/2.8. So the difference is only about a stop, but there is a difference.


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1 year 11 months ago #737050 by Rob Conley
Thanks guys, but what I'm trying to clarify, is if you crop a full frame shot, it's basically the same as what I crop sensor camera would have gotten? 


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1 year 11 months ago #737052 by Nikon Shooter
Yes Rob. all it does is crop "on capture". Would it do anything
else it would be called "wonder sensor with wizardry"! :P

Light is free… capturing it is not!
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1 year 11 months ago #737182 by Kenta

Nikon Shooter wrote: Yes Rob. all it does is crop "on capture". Would it do anything
else it would be called "wonder sensor with wizardry"! :P



Yep!  


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1 year 11 months ago - 1 year 11 months ago #737207 by TCav

Rob Conley wrote: ... if you crop a full frame shot, it's basically the same as what I crop sensor camera would have gotten? 


Perspective-wise, yes.

... with the same lens.


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