結果 : what is considered a long focal length telescope
5:30

Telescope Focal Length Explained

Alien Tech
19,183 回視聴 - 2 年前
6:28

Telescope Focal Ratio Explained

Alien Tech
24,525 回視聴 - 2 年前
9:00

What Focal Length Can Get Which Deep Sky Object?

Astro Escape
16,548 回視聴 - 2 年前
2:18

Telescope Buying Guide: Focal Ratio & Focal Length

ExpertVillage Leaf Group
1,417 回視聴 - 3 年前
13:34

How Does Focal Length Change What Size Pixels a Camera Sensor Needs?

SKY STORY
12,564 回視聴 - 3 か月前
12:11

Astro Tutorial #1.5: Focal Length and Aperture

catchingphotons
45,803 回視聴 - 4 年前
28:42

Telescope Focal Length Explained + Deep Dark Sky Tour

Dakota Starry Nights
2,751 回視聴 - 4 年前
4:29

What lens shall I buy? Focal Length - Learn how different focal lengths change your image

Wolf Amri
863,345 回視聴 - 5 年前

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0:59

See the World Up Close with Kenko Mirage 10x50 Binoculars#shorts

FotoCart India
203 回視聴 - 1 日前
11:51

Focal Length vs. Focal Ratio: What They Do Conceptually! #astronomy #science #telescope

AstroQuest1
1,632 回視聴 - 1 年前
20:17

Most Versatile Focal Length for a Telescope?

James Lamb
45,335 回視聴 - 4 年前

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1:26

Telescope Focal Length Explained

StarLust
3,753 回視聴 - 4 年前
8:25

7000mm Focal Length (!!!) & More Astronomy Adventures...

Dylan O'Donnell
35,962 回視聴 - 4 年前
12:50

Understanding Eyepieces for Telescopes - Focal Length, Size, AFOV, Eye Relief

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13,986 回視聴 - 3 年前
11:45

Taking Pictures of Stars at 2000mm Focal Length.

AstroBackyard
186,654 回視聴 - 4 年前
8:08

Astro Tutorial #1.6: THE F-RATIO "fast" vs "slow" scopes

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31,865 回視聴 - 4 年前
10:08

Telescopes in Astronomy

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0:34

This is so cool… 😳 #astrophotography #space #galaxy #telescope

Double Singularity
2,328 回視聴 - 1 年前
1:01

How JWST compares to our cameras and lenses!

Forest Chaput de Saintonge
1,621 回視聴 - 2 年前
12:29

4 photos taken with 4 different telescopes - Astrophotography at 250mm - 1422mm focal length

Russell's Astrophotography
31,365 回視聴 - 1 年前