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Go fast, or go home! - Part I

  • Writer: Ville Puoskari
    Ville Puoskari
  • May 15, 2024
  • 2 min read

Ever since I have built the first version of my travel telescope with a 3D printer - I have had a feeling I could make a larger aperture scope for my astronomical adventures. With larger aperture comes the inevitable problem of focal length - a 200mm f/5 telescope is almost a meter long! But what if you would go with a faster optical system? Well there is an idea! Que a long but fruitful conversation to India and the heart of this project is born at the hands of a master optician of Aperture telescopes. For a custom made mirror I wanted to go all in and boy did they not disappoint. The primary mirror is 200mm diameter f/3.3 light bucket with a measured Strehl ratio of 0.966!


With such a great mirror comes the need for a very good secondary mirror too. My first purchase of a 90mm diameter Hubble Optics secondary from Germany came in a million pieces due to poor packaging, although I got a full refund on that I have not been able to source another one yet in EU. Speaking of secondary mirrors - I have made some progress on the secondary mirror spider - the first iteration was 3D printed with an aluminum central piece for bolts. Then I had an idea that I could make the entire assembly if I just had a proper milling machine - or that was at least the excuse I gave myself (and the wife!) to buy a milling machine.


It remains to be seen which of these is a better solution, I'm keen to test them out for potential flexures once the OTA is completed. Stay tuned for part two!

 
 
 

2 Comments


Brad sheppardley
Jun 12

The post about going fast or going home felt motivational because it emphasizes pushing limits and focusing on performance. I remember a time during exams when I tried to complete everything quickly but realized accuracy was more important than speed. At that stage, I looked for aleks course help online to manage my workload more effectively. The message reminds us that balance between speed and quality is essential in any task.

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Andrian Anderson
Jun 05

The post “Go Fast or Go Home Part I” was interesting because it talks about speed, performance, and pushing limits in a fast-moving world. It made me think about how pressure can affect the way people work and make decisions. As a student, I once had many online assignments and deadlines in the same week, and I used Take My Canvas Class support during that time to stay organized and manage my workload better. The idea of moving fast while staying focused really connects to student life.

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