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Thread: Hello from Ontario, Canada

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    Default Re: Hello from Ontario, Canada



    Quote Originally Posted by Wacmartin View Post
    The next 2 hours were just spent scaning the sky, and we had a lot of fun.
    2 things that we need to fix are aligning the finder scope a little bit better, we did this during the day but it's a little off still. What eyepiece would be best to do this with, the 10 or 25? We did it with an object that was at least 500 meters away, and what was in the crosshairs for me was about an 1/8" below them for my wife. The other is getting a finder scope with a 90░ eyepiece, my back was getting real sore looking through it and it was very awkward when the scope was more vertical.
    Wider field is usually much easier to start. If you want to be super picky (not usually necessary with a fast scope doing visual) you can start with the 25 then move to the 10 once you have the two scopes mostly aligned. You can start with the smaller eyepiece but if you don't luck out and have the target visible at the start it can be a pain trying to get the target in both scopes.

    You can do rough alignment during the day but its much better to align them with a star. Not sure why but I have a lot better results using a star than even tiny objects waaay off in the distance.

    As mentioned above, a Telrad type device is a great alternative to or compliment of a finder scope, particularly since there are sky maps which use the telrad reticule FoV to show you where to point for harder to find targets. A red dot finder is also pretty good and pretty cheap. Either one is more comfortable to use since you don't have to twist your head around to get right at an eyepiece.

    90 degree finders can be more comfortable to use but I personally just can't get used to them. Finders give you a reversed and uside-down view which takes a bit of getting used to but add in the 90 degree change and I just never get the hang of it.

    Another problem with finder scopes is it that due to the aperture and magnification, it can be quite difficult to differentiate between stars. You think you're looking at one star and in fact you're on a different one which blows the alignment procedure or sets your star-hopping off on the wrong foot. With a red-dot or Telrad you need a naked eye visible target and you KNOW you're pointed a the star you intended.
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    I saw Saturn last night! It was a great night for looking up.
    I'm going to lay off any eyepieces for now, but I do have my eyes on a certain wide field of view set, and my birthday is coming up.
    First 2 purchases are going to be a Barlow, and the tel rad.
    Saturn was pretty faint in both the 10mm and 25mm eyepieces, I'm chalking it up to light pollution and not enough magnification. I was told I need at least 200x magnification for planetary viewing. We also saw M2, Altair, and Fomalhaut.

    Sent from my LG-D852 using Tapatalk

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    Default Re: Hello from Ontario, Canada

    Was Saturn faint or did you mean small? Even in my 4" refractor Saturn is quite bright but even with the 10mm its still very small.

    A Barlow is a great idea and you can get >2x. Its far cheaper than buying multiple higher power eyepieces.

    Wide FoV is great too, I try to always have a 32mm with me for faint objects. Sometimes you have to give up magnification to brighten up very dim objects (concentrate the light in a smaller spot). I believe you have the ability to use 2" eyepieces with that scope? If so, get a 2" 30+mm, you won't regret it.

    One caveat, there is a cutoff for how big an eyepiece can be for a particular scope. Any larger and you will see black edges rather than more sky. Its explained in several postings here and on cloudynights but of course now that I'm actually trying to find one, I can't. Basically somewhere over 35mm you hit a point where larger eyepieces just can't give you a wider field of view because the physical sizes of various parts of the scope block any more sky.
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    Default Re: Hello from Ontario, Canada

    Quote Originally Posted by Wacmartin View Post
    Saturn was pretty faint in both the 10mm and 25mm eyepieces, I'm chalking it up to light pollution and not enough magnification. I was told I need at least 200x magnification for planetary viewing. We also saw M2, Altair, and Fomalhaut.
    As magnification increases, brightness decreases. Perhaps as a beginner, your expectations regarding brightness might be a bit high. I find Saturn's brightness fine, even in my little 80mm ST80 scope.

    Be patient and have fun

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    Sorry faint was the wrong word, it was bright, It was just small. I'm going to have to do a lot of research before I actually do buy any eyepieces, to make sure I do get what I want. My copy of Night Watch came yesterday, so far I'm really enjoying the read.

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