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APM 100 ED - Best for higher mag planetary views - Is this correct?

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#1 bond19

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Posted 27 September 2020 - 05:55 AM

Hi Stargazers,

 

Just trying to figure outs the main reason people choose the much higher priced ED glass in APM BT's?

 

It seems none ED glass is just fine for low power views of star fields, nebulas etc. 

 

Am I correct in assuming the reason most people go for ED glass is the ability to better control CA.

 

Does having ED glass in your BT allow you to push the magnification much higher and have sharper, better contrast views of bright objects such as the moon and planets?

 

Would none ED glass allow all of the above? (but with the caveat of more CA being present?)

 

Essentially does ED glass primarily handle CA better, or can you also push an ED BT to higher mags with cleaner views compared to a none ED glass BT?

 

Thanks


Edited by bond19, 27 September 2020 - 05:57 AM.


#2 Mark9473

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Posted 27 September 2020 - 06:01 AM

CA is unfocused light, so also on DSO the ED will be a little bit better - thinking specifically of resolving globular clusters for example.
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#3 ihf

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Posted 27 September 2020 - 11:36 AM

https://www.cloudyni...standard-vs-ed/



#4 Alex04

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Posted 02 October 2020 - 11:36 PM

Also ED/SD shows much cleaner views during the day.

 

ED/SD is much more of a multipurpose tool to show clean images while a non-ed is good mainly for lower power and lower brightness.




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