4.5" Reflector Vs. 90mm Refractor - an Astronomy Net General Forum Message

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4.5" Reflector Vs. 90mm Refractor

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Posted by George on May 2, 2001 03:14:42 UTC

Hey, I went out scope hunting today and I was told the most odd thing. That a 4.5" reflector has about the same light gathering ability as a 90mm refractor. This is all do to the secondary mirror reflecting in to the eyepeice.
To me this doesn't seem logical but hey, what do I know? Just wanted to know if someone could explain this one to me and tell me which would be better for getting a peek at some brighter Deep Space Objects.

Thanks for taking the time! (In Advance)

Follow Ups:

Effect of Central Obstruction (secondary) - smbodenh - May 3, 2001 - 13:17 UTC
- Thanks For the help - dude31 - May 4, 2001 - 02:41 UTC

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