Link : light transmission for telescope designs.

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Airconvent
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Link : light transmission for telescope designs.

Post by Airconvent »

A good read if you want to know more about why a 4" refractor performs better than a 6" SCT...

http://www.licha.de/AstroWeb/articles_f ... 3?iHowTo=8
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kayheem
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Re: Link : light transmission for telescope designs.

Post by kayheem »

Airconvent wrote:A good read if you want to know more about why a 4" refractor performs better than a 6" SCT...

http://www.licha.de/AstroWeb/articles_f ... 3?iHowTo=8
Hi Rich,

Your post is a bit misleading. The article does not say that a 4" refractor performs better than a 6" SCT. It may allude to a better light transmission, but performance is more than that, surely!

If I were a newbie taking your post superficially, I could make a refractor using a magnifying glass (2 air-glass interface) and think it would peform better than an SCT!

Don't mean to 'hum-tum' you, but you should qualify your statements to aid the newbies, although I am sure the more scope-savvy ones know what you are talking about. I *am* quite an SCT fan, you know! :D

Kay Heem
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Re: Link : light transmission for telescope designs.

Post by VinSnr »

Hi Rich,

Your post is a bit misleading. The article does not say that a 4" refractor performs better than a 6" SCT. It may allude to a better light transmission, but performance is more than that, surely!

If I were a newbie taking your post superficially, I could make a refractor using a magnifying glass (2 air-glass interface) and think it would peform better than an SCT!

Don't mean to 'hum-tum' you, but you should qualify your statements to aid the newbies, although I am sure the more scope-savvy ones know what you are talking about. I *am* quite an SCT fan, you know! :D

Kay Heem
yeah man, Rich. All it says is that the refractor design has better light transmission...it didn't say it will win the bigger SCT!

Better light transmission and the amount of light is two different thing! Also, with all those UHTC and starbright coatings, the SCT tranmission may be better than what is calculated in the article...

Don't anyhow pull a fast one ok? hehehehehehe :lol: :lol:
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Post by Airconvent »

alamak...you all keep on forgetting I'm a newbie...I just regurgitate what the "apparent" gurus say...heh heh...good that 2 SCT lovers responded here!
now if I can get KH to part his beloved 5" for an 8" heh heh
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Post by yllow »

Airconvent wrote:alamak...you all keep on forgetting I'm a newbie...I just regurgitate what the "apparent" gurus say...heh heh...good that 2 SCT lovers responded here!
now if I can get KH to part his beloved 5" for an 8" heh heh
How can Captain Kirk be a newbie, then I am a ultimate newbie. You forgot to mention 1x 5" refractor can buy 2x 8" SCT.
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