4" APO Refractor Shootout
Channel: Nebula Photos
Date: 2023-09-01

A 4" apochromatic refractor is a very nice telescope for astrophotography. With several on the market, it can be hard to pick one. In this video, I conduct real-world tests of four popular models to help you decide which may be the right telescope for you.

🔭 Telescopes Tested 🔭
Askar 103 APO: https://tinyurl.com/askar103
Founder Optics FOT106: https://tinyurl.com/FOT106
ZWO FF107 APO: https://tinyurl.com/ZWO107
Sky-watcher Esprit 100ED: https://tinyurl.com/esprit100

💻 Data downloads 💻 
Download the data from my imaging tests here: https://drive.google.com/drive/folders/1zjEhyrzHGMb4omEIBmbbrKxCScsIDLAa?usp=sharing
 
❤️ Patreon ❤️
Support this channel and join an amazing community of over 900 other amateur astrophotographers: https://patreon.com/nebulaphotos

==Contents==
0:00 What I'm testing
1:10 How I test & disclosures
3:43 The importance of the mount
4:37 Physical characteristics
25:56 Imaging tests

Channel Disclosures
=============================
I am a member of the All-Star Telescope, High Point Scientific, Astrobin, OPT, Agena Astroproducts, eBay, Astrogear.net, and Amazon affiliate programs. Product links in my video descriptions are typically affiliate links, which means, at no extra cost to you, I will make a commission if you click them and purchase something. I also have working relationships with the following companies/brands to receive products to test: Askar, Svbony, High Point Scientific, Agena Astroproducts QHYCCD, WOBoyz, SmallRig, Venus Optics, Astrogear.net, Night Sky Camera, Hunt's Photo & Video. I do not review products for money and any brand deals will be fully disclosed. If you have any questions about any of this, please get in touch.

Video Disclosures
=============================
All of these telescopes were sent to me on loan so that I could test them. You can see my review policy here: https://nebulaphotos.com/reviews