where can i read up what all of that means? i only understand that you shot the milky way before and added if afterwards so the night sky wont get blurred,right?
Yeah so he took two different photos and merged them together later on.
The aperture value f/1.4 or f/11 is the amount of light traveling through the lens into the sensor. This also affects focus as well.
A smaller number (1.4) let's through the most light and has a really small focal area, whereas the bigger number let's through less light, but can hold a longer area in focus.
ISO is sensor sensitivity, ish. The higher the ISO, the more it'll boost the image. During daytime you usually shoot between ISO 100-1600. At night time I'll typically start off at 6400 and then adjust from there. Sometimes I'll go up to 12800 or 10000 depending on how long my exposure is. The higher the ISO, the more grain you'll introduce though song you'll lose a lot of quality if you don't expose correctly.
I generally try and keep the ISO as low as I can.
The one thing that I'll add, is that with a longer exposure time, the stars start streaking through the sky rather quickly. This depends on the focal length, but with a 24mm on a full frame, I stick with a maximum exposure length of 15 seconds. Anything longer than that, the stars start looking blurry.
Obviously, it takes me longer than 15 seconds to do a climb like this, so I shot the stars from the same position with the intention of replacing the blurry stars from the climbing exposure. Here's the 368 second exposure without the stars composited in.
lonelyspeck.com is a great resource if you are interested in learning more about astrophotography specifically.
And if you have any other questions, feel free to ask away.
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u/shatteredankle Aug 13 '21
This is a composite shot. The Milky Way was shot at f/1.4, ISO 1600, and 15 sec. The climbing was shot at f/11, ISO 320, and 368 sec.
The climb itself is just over 100 feet tall.