All Questions
Tagged with newtonian-telescope telescope-lens
6 questions
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Is there a reflecting telescope like as a Newtonian telescope but with a negative lens before the diagonal mirror?
A Cassegrain reflecting telescope contains a negative optical element between the main mirror and its focus. This increases it's focal length.
Is there a reflecting telescope like as a Newtonian ...
- 339
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How to estimate my eyepiece FOV?
As a follow-on to my question about seeing Jupiter and Saturn at the same time in my scope, I'd like to ask how I might determine the Field of View (FOV) of my eyepieces. More specifically, I'd like ...
- 395
-1
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Does making a ground based telescope larger always give you a better resolution?? why?? or why not? [closed]
i just don't really understand this topic.
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9
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How much of a difference do good lenses make?
I recently purchased a Celestron PowerSeeker 114EQ and with it I got three lenses (which I assume are low quality), a 4mm, a 20mm and a 3 x Barlow.
I can get pretty decent views of the moon but a ...
- 193
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How to view Jupiter with 4.5" Newtonian Reflector
I have a 4.5" Newtonian Reflector and I took a look at Jupiter the other night.
I was able to get a reasonably sharp view of it and see a number of it's moons, but I was unable to see any surface ...
- 140
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Are Barlow Lenses Good For Deep Sky Observing?
I'm using a 750mm (focal length) by 150mm (aperture) newtonian reflector and I've been curious about using Barlow lenses on deep sky objects.
Some of the astronomers at my local observatory say that ...
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