Thu Oct 3 14:43:07 EDT 2013 Godfrey DiGiorgi wrote:
> On Oct 3, 2013, at 10:54 AM, Larry Colen <lrc at red4est.com> wrote: > > >> Wrong. Format ALWAYS influences apparent DOF. > > > > You are saying that if I take a photo with a D800, and in lightroom > > crop it down so that I'm only using the area of a u4/3 sensor, then > > the apparant DoF will change? > > No. By doing that you are changing the D800 format, making it the same > as mFT format, and the resulting DoF will be the same if you use the > same focal length lens on both cameras. You have changed the > magnification by cropping the D800 format. > > G Larry, the answer is "No", as Godfrey said, if you do not zoom in on your screen (or in the print) after you did the crop. If you zoom in, then yes, the apparent DOF will change, you'll see objects less sharp. You are not surprised that somewhat out-of-focus photograph looks sharp enough when you are looking at a small thumbnail (or preview on the back of the camera), but when you blow it up on your 1900x1200 screen, you clearly see it being OOF. Changing the crop factor is equivalent to blowing it up (to keep the same overal size of the image [not of a particular object] on the screen (print)). HTH, Igor -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
