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Telescope
Posted on 5/7/20 at 2:38 pm
Posted on 5/7/20 at 2:38 pm
Any idea what you can see with a 700 mm focal length, 60 mm objective telescope lense? My boy was gifted this and the moon was "too close".
2
Posted on 5/7/20 at 2:48 pm to thegambler
quote:
Any idea what you can see with a 700 mm focal length, 60 mm objective telescope lense? My boy was gifted this and the moon was "too close".
Should work OK for the moon. What is the focal length of the eyepiece ? To get the magnification of the scope you divide the scope focal length by the eyepiece focal length..example.. 700mm scope fl using a 10 mm eyepiece will get you 70x. That said depending on the mount/eyepiece and scope quality it may be hard to use that mag. I suggest using at least a 25mm eyepiece to start. That combo will give you around 25x which is plenty to see detail on the moon.
This post was edited on 5/7/20 at 2:50 pm
Posted on 5/7/20 at 3:03 pm to thegambler
Was he looking at the moon in the full phase? That is probably the worst time to do so, especially at this time. Too much light is reflected. You can purchase a lunar filter which will cut down on the strong glare.
When you say "too close" do you mean that the entire moon didn't fit in the viewing area? If that is the case, then the scope is powerful enough that you will be able to view planets nicely. Currently Venus is visible early in the after sunset. I'd try around 8:45. It will drop out of sight around 10.
Mars, Saturn and Jupiter are all up in the morning time, rising after midnight. If you've never seen those, they're worth getting up to check out. Mars isn't so spectacular but finding and viewing Jupiter, usually with a couple of moons visible and it's big spot is pretty cool. Seeing Saturn is always a treat.
When you say "too close" do you mean that the entire moon didn't fit in the viewing area? If that is the case, then the scope is powerful enough that you will be able to view planets nicely. Currently Venus is visible early in the after sunset. I'd try around 8:45. It will drop out of sight around 10.
Mars, Saturn and Jupiter are all up in the morning time, rising after midnight. If you've never seen those, they're worth getting up to check out. Mars isn't so spectacular but finding and viewing Jupiter, usually with a couple of moons visible and it's big spot is pretty cool. Seeing Saturn is always a treat.
Posted on 5/7/20 at 5:20 pm to captron
This is great info. I'm beyond a novice. It's a 70 mm lense with a 60 mm objective. I appreciate the info. Much more productive than some other boards
Posted on 5/7/20 at 5:21 pm to Boudreaux35
You're right. It was blurry and didn't fit. I need to get some interchangeable lenses. I figure. Thanks!
Posted on 5/7/20 at 6:45 pm to thegambler
What is the make/ model of your scope ? Eyepieces come in several barrel sizes with the 1.25 inch being the most popular. There are also .965 and 2 inch. If you are serious a good place to start is Orion Telescope. If you have the 1.25 inch barrel the Orion Plossl are a good value.
Been doing astro for 25 years.. can be a money pit if you get serious. :-)
LINK
Been doing astro for 25 years.. can be a money pit if you get serious. :-)
LINK
Posted on 5/7/20 at 6:59 pm to captron
70x is too much for the moon in full. Closeups of craters? Yes.
Posted on 5/8/20 at 10:22 am to thegambler
quote:
You're right. It was blurry and didn't fit. I need to get some interchangeable lenses.
Shouldn't have been blurry. Might have had some condensation on one or more of the lenses. You have to let the telescope acclimatize for a while when going from inside to outside.
The fit will be fixed with a lower lens.
While you're getting a new lens, do yourself a favor and get a lunar filter. It is pretty cheap and just threads onto the back of the lens. You only need one, you can move it from lens to lens.
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