Originally posted by ckiang
like contrast adjustment, dodging, burning, etc.
Originally posted by Tweek
paiseh eh for the offtopic, I've always wondered what the dodging and burning processes are, and what do they do?
Originally posted by Darren
I say it depends on the level of cropping done and how forthcoming a poster is about the cropped amount.
With today's multi-megapixel digicams, its very very easy to produce an acceptable, some may even say, great, image to be displayed on the web by cropping to show only 15-20% of the original image.
The proof of the pudding would be to get the same image printed out - my guess is that the "Heavy Cropper" would not be able to produce acceptable images.
Its up to the ethics and integrity of the image owner as to how he wants to portray his "skills" - some ppl stick to full-frame or slightly cropped images, relying on their skills to enable them to get the image, some ppl prefer to go the Heavy-Cropping way and get a boost out of posting pics like that. And there are a million and one variations in between. To each their own ......
As an aside, using a longer focal length ("zooming in") is not entirely the same as cropping, because a longer focal length will compress the depth of the elements of the image and thus render a different image from a picture taken at a shorter focal length and subsequently cropped down to a similar subject size.Originally posted by HOCL
IMHO, cropping (digitally or otherwise) is no different from say using a (power) zoom lens, if we don't look at the issues abt resolution etc.
Purpose is the same (to remove distracting surroundings and improve composition), only the means are different.
So if using zoom is perfectly acceptable, why cropping is a crime?
Originally posted by Midnight
....
A far more controversial tool is digital editing and retouching. My opinion is that heavily digitally edited photos are perfectly valid as a form of art, but the photographer must take special care to note that the image is not representative of the original scene. In the end, it's the final product that counts, not the process, but we should not mislead others about the latter either.
Originally posted by Midnight
As an aside, using a longer focal length ("zooming in") is not entirely the same as cropping, because a longer focal length will compress the depth of the elements of the image and thus render a different image from a picture taken at a shorter focal length and subsequently cropped down to a similar subject size.
Originally posted by tsdh
Regarding perspective, Rueyloon was right, as long as the distance between photographer and object is the same, perspective will also be the same regardless the lens' focal length.
The only difference is the depth of field.
Thanks for reminding me. You are correct, of course. I was actually thinking about shooting the same subject at different focal lengths while keeping the recorded subject size the same, i.e. at different subject-to-camera distances, in which case the perspective will indeed change. You are right in that if the photographer stays in the same position vis-a-vis the subject, a longer focal length and cropping will both yield the same perspective. My mistake. :embrass: :embrass:Originally posted by rueyloon
Zooming in as EXACTLY the same as Cropping. "Compression" as you meantioned has to do with perspective, which is a factor of subject to photographer distance. As long as we're standing at the same subject to photographer distance, the perspective would be the same.
No. The DOF is different if you use different focal length (at the same aperture, same distance between camera and subject).Originally posted by rueyloon
I'm abit on shaky ground here, but I think the DOF would still be the same. Since zooming is just cropping, the rest of the factors would remain the same. DOF depends on where you're focussing (which means subject distance), and aperture.
Originally posted by tsdh
No. The DOF is different if you use different focal length (at the same aperture, same distance between camera and subject).
The one using shorter focal length has more DOF.
Probably you can try it yourself.
A bit typo-error there: pinhole offer great DOF, but not sharpness (due to higher diffraction of light above f/8)Originally posted by StreetShooter
(ie pinholes focus much more sharply than wide open lenses).
Don't worry, Jed is not around.Lest I get knocked on the head by Jed, let me say that this is only my fanciful theory and I am not at all sure about what I am talking about.
Originally posted by StreetShooter
By the way, coming back to the original thread, what is the difference between cropping when taking the shot (by positioning the camera and choice of focal length), and cropping after taking the shot? No difference to me.