Reply to thread

Message

<blockquote data-quote="BF Hammer" data-source="post: 813251" data-attributes="member: 48483">Yeah, at 50mm it would be disappointing. Those kind of images are normally shot at 24mm or wider, and f/2.8 or wider if available.But the secret is that you don't do it with a single exposure. Between the movement of the earth making the stars turn into trails and the need of long time exposure, you have to take dozens of photos and use software that will align the images with each other and combine the light in an additive way while averaging out the noise. At 20mm you are pretty much limited to 10-12 second exposures before you get motion blurring in the stars, at 50mm it is more like 4-5 seconds. That is from a tripod, if you use a star tracker on the tripod you can increase the times but get motion blurs in the foreground image.And astrophotography is never about what the naked eye can see. It is always an exaggeration and enhancement of what is present but invisible. You can see a faint Milky Way in a dark sky, but it is never like the photos you see.</blockquote>

[QUOTE="BF Hammer, post: 813251, member: 48483"] Yeah, at 50mm it would be disappointing. Those kind of images are normally shot at 24mm or wider, and f/2.8 or wider if available. But the secret is that you don't do it with a single exposure. Between the movement of the earth making the stars turn into trails and the need of long time exposure, you have to take dozens of photos and use software that will align the images with each other and combine the light in an additive way while averaging out the noise. At 20mm you are pretty much limited to 10-12 second exposures before you get motion blurring in the stars, at 50mm it is more like 4-5 seconds. That is from a tripod, if you use a star tracker on the tripod you can increase the times but get motion blurs in the foreground image. And astrophotography is never about what the naked eye can see. It is always an exaggeration and enhancement of what is present but invisible. You can see a faint Milky Way in a dark sky, but it is never like the photos you see. [/QUOTE]

Verification