All
Search
Images
Videos
Maps
News
More
Shopping
Flights
Travel
Notebook
Report an inappropriate content
Please select one of the options below.
Not Relevant
Offensive
Adult
Child Sexual Abuse
Length
All
Short (less than 5 minutes)
Medium (5-20 minutes)
Long (more than 20 minutes)
Date
All
Past 24 hours
Past week
Past month
Past year
Resolution
All
Lower than 360p
360p or higher
480p or higher
720p or higher
1080p or higher
Source
All
Dailymotion
Vimeo
Metacafe
Hulu
VEVO
Myspace
MTV
CBS
Fox
CNN
MSN
Price
All
Free
Paid
Clear filters
SafeSearch:
Moderate
Strict
Moderate (default)
Off
Filter
5:30
Subjective Refractometry Technique for Ophthalmic Technicians
82.7K views
Nov 1, 2018
YouTube
Eye Tech Training
3:04
Yerkes Observatory | Operating the World’s Largest Refracting Telesc
…
44.4K views
Feb 7, 2023
YouTube
Grainger
9:48
Guide to Refractor Optics - Choosing the Best Telescope for
…
20.7K views
Apr 13, 2023
YouTube
Astrolavista
7:11
Refractor vs Reflector telescope explained for beginners
58.5K views
Dec 3, 2022
YouTube
Alien Tech
7:34
Askar FRA300 Pro Quintuplet APO Refractor | Full Review
5.3K views
2 months ago
YouTube
High Point Scientific
7:22
Askar SQA55 Quintuplet Refractor | Full Review | High Point Scientific
6.3K views
Sep 13, 2024
YouTube
High Point Scientific
12:04
Askar SQA 106 Unboxed – Best Refractor for Astrophotography?
4.3K views
7 months ago
YouTube
View into Space
3:06
Just Dropped! Askar 160APO Triplet Air-Spaced Refractor | High Point
…
9.5K views
10 months ago
YouTube
High Point Scientific
8:07
I Built a New Budget Portable Refractor EAA Rig (SV550 80 mm)
1.1K views
1 month ago
YouTube
Astro Down Under
11:48
Can This Remove Newtonian Star Spikes and Mimic a Refractor?
1 week ago
Microsoft News
Cuiv The Lazy Geek
See more videos
More like this
Feedback
Feedback