Astrophotography vs Photomicrography
天体写真 / 顕微鏡写真
Both sit in Photographic Genres, so the question is not what they belong to but how they behave. Both are read here as technique. They are reached for with some of the same intent, which is where they get confused.
Astrophotography
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From Whipple's daguerreotype of the Moon to Hubble's Pillars of Creation, long exposures and instruments have turned the invisible universe into pictures. Assigning false color to scientific data is a design decision, and it shapes the public image of space.
Photomicrography
Scientific photography that records, through a microscope, structures the eye cannot reach. Bentley's snowflakes proved the scientific image could be beautiful, and that claim runs on through polarized color and fluorescence to the Nikon Small World of today.
| Astrophotography | Photomicrography | |
|---|---|---|
| Era | 1840– | 1840s– |
| Family | Photographic Genres | Photographic Genres |
| Kind | Technique | Technique |
| Cues | Long-exposure starfields / Images through instruments / Designed false color / The sublime of scale | Structures beyond sight / Specimens on black / Polarized and fluorescent color / The wonder of symmetry |
| Best used for | Public releases of observation results from research and space programs · Large-format displays whose subject is the sheer size of space | Illustrations for outreach and science writing on research findings · Product documents that show material structure as evidence |
| Type | Name object, instrument and wavelength, and state the color assignment | Put magnification and a scale bar in the frame with the specimen name |
| Composition | Set the object off center and let star density carry depth | Float the specimen on black, turned so repetition reads |
| Material | Stack exposures for range and keep a record of how far it was pushed | Separate tissues by polarized or fluorescent color and record the basis |
| Caution | Saturation and stretching get pushed for impact until no one can tell which part of the image is measurement and which part is presentation. | Scale bar and magnification get dropped while the color is being made beautiful, and the result becomes decoration that no longer works as a scientific figure. |