Askar 151 PHQ Review - Part 2: Optical Test скачать в хорошем качестве

Askar 151 PHQ Review - Part 2: Optical Test

CLICK ON THESE AFFILIATE LINKS TO SUPPORT THE CHANNEL: Agena Astro: https://bit.ly/487tmnj High Point Scientific: https://bit.ly/49z9qdv Amazon: https://bit.ly/darkskygeek-amazon-aff... OTHER WAYS YOU CAN SUPPORT THIS CHANNEL: Send a donation via PayPal: https://www.paypal.com/donate/?hosted... Click on the "Thanks" button in the toolbar located underneath this video. Join the Dark Sky Geek Community Discord server:   / discord   Like, subscribe, comment on this video, tell your friends about it, etc. DESCRIPTION: This is the second video of a two-part series in which I review Askar's latest astrograph, the awesome Askar 151 PHQ, a monster 6" refractor with a 1,050mm focal length. In the previous video, I did an unboxing and shared my first impressions. In this video, I go over the results of a series of quantitative and qualitative optical tests I ran on this telescope and its reducer. Support the channel by using the affiliate links below if you want to purchase anything from Agena Astro, my favorite astro retailer :) My equipment: Askar 151 PQH: http://bit.ly/3RQFFyJ Askar .7x reducer for PHQ series: https://bit.ly/3Q9uvnC Askar M54 T-Ring for Canon DSLR EOS Cameras: https://bit.ly/40gsXvp Askar M54 T-Ring for Nikon F-Mount DSLR Cameras: https://bit.ly/40cbIvj Askar M54 Backfocus Adjuster: https://bit.ly/40c0qal Askar M54 Female to M48 Male Backfocus Adjuster: https://bit.ly/3QA5sKx iOptron CEM70 Center Balanced Equatorial Mount: https://bit.ly/3PzUMuP iOptron Tri-Pier: https://bit.ly/3RhDzYz Antlia V-Series LRGB Pro Imaging Filter Set: https://bit.ly/3LHcRVJ Antlia SHO Narrowband 3nm Pro Imaging Filter Set: https://bit.ly/3Rj3yii ZWO 8-Position Electronic Filter Wheel: https://bit.ly/488uvuW ZWO ASI533MM Pro Cooled Monochrome Astronomy Camera: https://bit.ly/4887g4b ZWO ASI174MM Mini Guide Camera: https://bit.ly/469sJYv Follow me! Instagram:   / darkskygeek   Facebook:   / julien.lecomte   Music credits: Scott Holmes Music: Feeling Home The 126ers: See You On The Other Side Image credits: Third quarter moon by Thierry Legault - http://www.astrophoto.fr/ Links mentioned in the video: Cloudy Nights thread about the Askar 151 PHQ: https://www.cloudynights.com/topic/87... GitHub repository containing the Python notebook used to estimate the amount of longitudinal chromatic aberration in a refracting telescope: https://github.com/jlecomte/chromatic... Roland Christen's notes on star testing refractors: https://www.csun.edu/~rprovin/roland/... CHAPTERS 00:00 Introduction 01:15 Disclaimer 01:47 Quick Collimation Check 02:31 Visual Test 06:12 Longitudinal Chromatic Aberration 10:47 Wavefront Analysis 13:27 Imaging Performance 17:57 Conclusion