Lincoln penny at 10X : 無料・フリー素材/写真
Lincoln penny at 10X / Darron Birgenheier
| ライセンス | クリエイティブ・コモンズ 表示-継承 2.1 |
|---|---|
| 説明 | Take out a Lincoln penny, and have a look at the "LIBERTY" mark to the left of Lincoln's bust. What you see here are the first three letters of that word, photographed in macro. I used a 10X microscope lens mounted to my old Nikon D50 DSLR via a series of adapters.This is the full frame as shot, not a cropped portion of the image.As you'll notice, depth of field at 10X is VERY shallow. This is an unavoidable law of physics, so better equipment can't do much. I calculated the DOF with my setup to be around 16.8 micrometers. A micrometer is 1/1,000 of a millimeter, so that's only .0168 millimeters, or 0.00066 inches! (less than a thousandth of an inch).There is a process called "focus stacking" that can combine images taken at several subject distances into one seamless image with much greater depth of field. That will have to come later for me, as stacking at 10X requires a VERY demanding studio setup and close attention to detail. For example, I would need a way to accurately and consistently move my subject less than a thousandth of an inch for each exposure, and do this perhaps dozens or even HUNDREDS of times for ONE final photograph. |
| 撮影日 | 2011-09-19 22:57:26 |
| 撮影者 | Darron Birgenheier , Reno, NV, USA |
| タグ | |
| 撮影地 | |
| カメラ | NIKON D50 , NIKON CORPORATION |
| 露出 | f/0 |
| 開放F値 | f/0 |
| 焦点距離 | 0 mm |