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Star photography introduction

Maobeinan Erik

10. 1 1.20 19

catalogue

Classification of starry sky photography

Get ready.

Selection of camera and lens

Introduction to general starry photography (equipment and methods)

Star-orbit photography strategy (long time)

Science popularization of deep space celestial bodies (with high requirements for equipment)

It is recommended to collect it for later use.

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? Aerial photography

Ordinary starry sky

Gui Xing

Deep Space Objects (NASA)

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? Get ready.

View weather

Light pollution in the city has a great influence on starry sky photography. Don't fantasize about shooting the starry sky in the city.

As early as the end of the Eastern Han Dynasty, Cao Cao told us a truth in his Short Songs: there are fewer stars in the moon. Like light pollution, the bright moonlight is also a kind of strong light for the starry sky. When there is a big moon hanging high in the sky, the starry sky will darken.

The best shooting time is generally between the 26th and 3rd of the twelfth lunar month, which is the darkest time of the moonlight.

Summer and autumn are the best seasons to shoot the starry sky, and the shooting time is best from 9 pm to 3 am.

You can basically give up shooting on rainy days, cloudy days and foggy days.

Finally, find a place without light pollution and choose a sunny day.

Pay attention to safety in field shooting.

Check the star map

Look at the time when the moon rises and sets, identify constellations, etc.

IOSStar Walk2？ ￥ 18.00

Its free version is very comprehensive in function, the layout of the star map is super exquisite, it has a high-tech feeling, and everything is clear and easy to understand. I think it is the most exquisite mobile phone application in Yun Yun. Built-in automatic positioning mode, real-time display of nearby stars or galaxies. You can also check the time of sunrise and sunset every day on the APP.

(alternative: star map? Free)

Android star map is free? /? Google Sky Map is free.

Computer? Stellarium is free.

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The method is more complicated, and there is a chance to update it separately.

Shutter, aperture, ISO, cumulative exposure time parameters

shutter

The exposure time of a single photo is generally 25-30 seconds, and a photo is taken every 2 seconds (if there is no interval shooting function, the camera can only shoot through cable release).

Cumulative exposure time

Theoretically, a star will only rotate 360 degrees in 24 hours, and the whole orbit can be closed. In reality, it is impossible for ordinary cameras to be exposed for 24 hours. The ideal star map exposure time is usually above 1 hour. The longer the exposure time, the better the track effect and the longer the track.

hole

F4 or greater.

ISO( 1600~6400)

Do not exceed half the maximum sensitivity of the camera.

For the star orbit, the density of the star orbit can be freely controlled. Usually, the higher the sensitivity or the larger the aperture, the denser the orbit of the star, and vice versa.

It is suggested to use low sensitivity and long exposure first to shoot a foreground with less noise.

Then you can set the shutter, aperture, sensitivity and cumulative exposure time. Just press the shutter and wait.

There are special requirements in extremely cold areas, such as the camera is cold-proof, the battery is almost dead, and other equipment such as baby warmers and fake batteries need to be purchased. )

After the pre-shooting, use ps stack to synthesize.

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? Deep space celestial photography

scientific popularization

The easiest deep space objects to photograph are as follows:

Spring: Bode galaxy M8 1 and starburst galaxy M82 (Ursa Major).

Summer: Lagoon Nebula M8 (Sagittarius)

Autumn: Andromeda galaxy M3 1 (Andromeda)

Winter: Orion Nebula M42 (Orion)

You need a magnetic declination meter, which is expensive and heavy.

Simple understanding.

After all, high-quality deep space objects were photographed by NASA with Hubble.

I'm Eric. Nice to meet you.

Double-click approval to light up the warmth.