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Telescope Sharpness vs. Diameter (including James Webb)

Optics Reflector Refractor
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#1 bips3453

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Posted 19 January 2022 - 01:50 AM

Came across this very informative video, thought to share: Telescope Sharpness vs. Diameter (including James Webb) https://www.youtube....l=HuygensOptics

 

 

 


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#2 Jon Isaacs

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Posted 19 January 2022 - 03:11 PM

Came across this very informative video, thought to share: Telescope Sharpness vs. Diameter (including James Webb) https://www.youtube....l=HuygensOptics

 

It's an interesting video that discusses why resolution is a function of aperture.. 

 

What really caught my eye was the first section, it began short discussion of the 30mm SCT made from a single piece of glass by optician and  Cloudy Nights member Rik ter Horst.

 

post-153985-14073959025378_thumb.jpg

https://www.cloudyni...idt-cassegrain/

 

Rik builds all sorts of amazing telescopes as hobby.. 

 

Here is a full video discussing the manufacture of the 30mm SCT:

 

https://youtu.be/HxwhCmO90UQ

 

Jon


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#3 bips3453

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Posted 19 January 2022 - 09:01 PM

It's an interesting video that discusses why resolution is a function of aperture.. 

 

What really caught my eye was the first section, it began short discussion of the 30mm SCT made from a single piece of glass by optician and  Cloudy Nights member Rik ter Horst.

 

post-153985-14073959025378_thumb.jpg

https://www.cloudyni...idt-cassegrain/

 

Rik builds all sorts of amazing telescopes as hobby.. 

 

Here is a full video discussing the manufacture of the 30mm SCT:

 

https://youtu.be/HxwhCmO90UQ

 

Jon

This is amazing... Thanks for sharing...


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#4 GeneT

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Posted 20 January 2022 - 03:50 PM

Very interesting! I did not know that the Webb telescope would perform differently to its segmented mirror than a non segmented one. In fact this is the first time I ever knew this about a segmented mirror.



#5 macdonjh

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Posted 20 January 2022 - 08:26 PM

I've seen reports about the seeing sometimes not being steady at L2.  Maybe James Webb will take some blurry photos, or the NASA folks will have to bin.




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