Pardon me for my potential silly question. Does a FF lens appear to be give a crop camera a larger aperture?
last heard, the bokeh of an F4 on FF is about the same as F2.8 on crop. Not sure how true it is, but I believe it. Anyone concurs on this?
Not sure how true it is, but I believe it. Anyone concurs on this?
.......... Also, you should not believe things you do not know to be true. ...........
Richter said:I am also not sure if I understand the question by TS correctly.
The aperture size is the same.
However, the DOF of FX will be shallower than DX using lens of same focal length and subject of the same size. The reason is because for DX to have the subject of the same size as the FX using lens of same focal length, you have to move back. The increase of focus distance will increase the DOF.
You can use this website to calculate the DOF that you will have. http://www.nikonians.org/html/resources/guides/dof/hyperfocal2.html
Not sure if I am right. Can the experts please correct if I have misunderstooding on the Apertures.
size of aperture is still the same, value is still the same
however, the depth of field will change, larger the film format, narrower the depth of field.
so on when on digital sensor, FX sensor will have narrower depth of field compare to a DX sensor using the SAME lens.
size of aperture is still the same, value is still the same
however, the depth of field will change, larger the film format, narrower the depth of field.
so on when on digital sensor, FX sensor will have narrower depth of field compare to a DX sensor using the SAME lens.
simplest way to explain...
if you have a full frame camera, shoot an image with say 50mm f1.4 with a subject in the middle. (pic A)
then using that same image, draw a square box in the middle then cut it out. (pic B)
Pic A is the full frame with more 'bokeh' than Pic B as Pic B is your Cropped Sensor.
Image is the same, as aperture and shutter speed, etc is the same, standing at the same distance, hence same bokeh.
Too tight for Pic B, take a step back.
Take the image again with full frame. (pic C)
then same crop on pic C (pic D)
Pic C will have much more room than Pic D, but after cropping althou subject look the same. Bokeh of Pic B & D will not be the same. Distance change affect bokeh.