@darkskygeek

@darkskygeek

Dark Sky Geek | Temperature Compensation With *Any* Focuser! @darkskygeek | Uploaded April 2024 | Updated October 2024, 2 hours ago.
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DESCRIPTION:
In this video, I talk about the latest version of my "Virtual Focuser ASCOM Driver", which now allows you to specify an alternate source to acquire temperature readings, which can be very beneficial if you want to experiment with the "Focus Temperature Compensation" technique.

LINKS MENTIONED IN THIS VIDEO:
* Dark Sky Geek Virtual Focuser ASCOM Driver: github.com/jlecomte/ascom-virtual-focuser
* Video tutorial about Focus Temperature Compensation: youtu.be/61ZKmtCBVDU
* Dark Sky Geek Community Discord server: discord.gg/Rg7JYF8nHw

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Temperature Compensation With *Any* Focuser!

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$Askar 151 PHQ Review - Part 1: Unboxing & First Impressions CLICK ON THESE AFFILIATE LINKS TO SUPPORT THE CHANNEL: * Agena Astro: https://bit.ly/487tmnj * High Point Scientific: https://bit.ly/49z9qdv * Amazon: https://bit.ly/darkskygeek-amazon-affiliate-link OTHER WAYS YOU CAN SUPPORT THIS CHANNEL: * Send a donation via PayPal: https://www.paypal.com/donate/?hosted_button_id=49UXY8F6VVYFA * Click on the Thanks button in the toolbar located underneath this video. * Join the Dark Sky Geek Community Discord server: https://discord.gg/Rg7JYF8nHw * Like, subscribe, comment on this video, tell your friends about it, etc. DESCRIPTION: This is the first video of a two-part series in which I review Askars latest astrograph, the awesome Askar 151 PHQ, a monster 6 refractor with a 1,050mm focal length. In the next video, we will go over the results of a series of quantitative and qualitative optical tests I am currently running on this telescope and its reducer. My equipment: * Askar 151 PQH: http://bit.ly/3RQFFyJ * Askar .7x reducer for PHQ series: https://bit.ly/3Q9uvnC * iOptron CEM70 Center Balanced Equatorial Mount: https://bit.ly/3PzUMuP * iOptron Tri-Pier: https://bit.ly/3RhDzYz * Antlia V-Series LRGB Pro Imaging Filter Set: https://bit.ly/3LHcRVJ * Antlia SHO Narrowband 3nm Pro Imaging Filter Set: https://bit.ly/3Rj3yii * ZWO 8-Position Electronic Filter Wheel: https://bit.ly/488uvuW * ZWO ASI533MM Pro Cooled Monochrome Astronomy Camera: https://bit.ly/4887g4b * ZWO ASI174MM Mini Guide Camera: https://bit.ly/469sJYv Follow me! * Instagram: https://www.instagram.com/darkskygeek/ * Facebook: https://www.facebook.com/julien.lecomte Music credits: * Scott Holmes Music: Feeling Home * The 126ers: See You On The Other Side$

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$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-affiliate-link OTHER WAYS YOU CAN SUPPORT THIS CHANNEL: * Send a donation via PayPal: https://www.paypal.com/donate/?hosted_button_id=49UXY8F6VVYFA * Click on the Thanks button in the toolbar located underneath this video. * Join the Dark Sky Geek Community Discord server: https://discord.gg/Rg7JYF8nHw * 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 Askars 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: https://www.instagram.com/darkskygeek/ * Facebook: https://www.facebook.com/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/879859-the-brand-new-askar-151phq/ * GitHub repository containing the Python notebook used to estimate the amount of longitudinal chromatic aberration in a refracting telescope: https://github.com/jlecomte/chromatic-aberration-estimator * Roland Christens notes on star testing refractors: https://www.csun.edu/~rprovin/roland/startest1.html 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$

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Temperature Compensation With Any Focuser! @darkskygeek