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  1. #11
    wgwrigs's Avatar
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    Thanks again for all the insight and tips, i did notice though on Celestrons website the highest useful magnification of the Astromaster 130 is 307x ? why would they list that and is that even possible?

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  3. #12
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    So you would buy it! Lol, just kidding. In theory or maybe under the right conditions, you may be able to reach such a high magnification but very rarely.
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  4. #13
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    For example, on my 90mm, i think my limit is 213x but i rarely ever go above 100x. The image gets to blurry and I begin to loose detail at around 120x for my humid weather conditions. If I were under the perfect sky conditions, I may be able to reach those higher powers like some have stated for my type of scope.
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  5. #14
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    Quote Originally Posted by wgwrigs View Post
    Thanks again for all the insight and tips, i did notice though on Celestrons website the highest useful magnification of the Astromaster 130 is 307x ? why would they list that and is that even possible?
    I have a 114 with a focal length of 1000mm, and an Omni 150 with a focal length of 750mm. On the surface, it would seem that the 114 would return a higher magnification than the Omni, however that is simply not the case. On a good clear night,(with Jupiter as the target) I can easily push the Omni to 300x while the 114 really maxes out at around 150x before either of them start returning fuzzies. I'll bet you dollars to donuts, that on a clear night, you should get images at 225x, if your scope is well collimated.

    Manufacturers "Useful" magnification would probably be true if you were on the space station. But the atmosphere also acts like a lens, and if it is distorted by turbulence or humidity, it can distort high magnification images. Usually, whatever the manufacturer gives, I chop by (a very rough)20% for a reasonable goal, or 50% for less than optimal seeing conditions.

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    16" ,Celestron Omni 150 XLT(My review here http://tinyurl.com/7me2mb6 ), 2"26mm 2"32mm, 32mm, 25mm, 12.5 mm, 10 mm, 6mm & 4 mm Plossl + 12.5mm, 9 mm, 5mm & 3mm Planetary. 2" & 1.25" 2x Barlows.
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  7. #15
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    Quote Originally Posted by wgwrigs View Post
    Im trying to educate myself a bit and this all seems so complicated sometimes. Im excited about my new scope Astromaster 130mm eq. Im getting it for x mas and figured it was great starter scope!

    my confusion lies in lenses, would i be able to see jupiter better in a 10mm lens with a 2x barlow OR a 32mm plossl by itself for a wider field of view? or with a 2x barlow? or just buy a 5mm with no barlow...


    i read so many different opinons on this scope, any info would be appreciated!
    I have an Astromaster 130eq myself with a 32mm Omni Plossl, a Meade 2x Barlow, and the 10mm that came with the scope. For me on MOST nights Jupiter is best seen with just the 10mm.. if the "atmosphere is steady enough" you can actually see the bands. At GOOD conditions I can barlow it and the detail is just amazing (of course collimation is a requirement). In normal nights using a barlow will just give you a bigger but "fuzzy" image. The 32mm is the most amazing thing for clusters and the Orion Nebulae (well at least for me). You can use the 32mm with a Barlow in almost any night for Jupiter.

    I am waiting on a 6mm Omni Plossl, once it comes I'll let you know if its worth investing on.


    P.S.Also the I found that the 32mm with a 2x Barlow is the right magnification (approx 40x) for the moon to almost fill the FOV. Its almost like your looking in a small window too because of the eye relief. Its really nice.

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  9. #16
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    Quote Originally Posted by wgwrigs View Post
    Im trying to educate myself a bit and this all seems so complicated sometimes. Im excited about my new scope Astromaster 130mm eq. Im getting it for x mas and figured it was great starter scope!

    my confusion lies in lenses, would i be able to see jupiter better in a 10mm lens with a 2x barlow OR a 32mm plossl by itself for a wider field of view? or with a 2x barlow? or just buy a 5mm with no barlow...


    i read so many different opinons on this scope, any info would be appreciated!
    I'm in the same boat with you. I just bought an Astromaster 130EQ from Costco ($100!!) and picked up a few lenses on craigslist. In addition to the 20mm erect and the 10mm lenses that it comes with, I got a 2x barlow, 25mm, 17mm, and another 10mm. All from the sirius line. Not the best, but good for a start and I got a great deal (with a telrad finderscope and riser thrown in). I am planning to pick up a Burgess/TMB 6mm panetary II and am looking for a good 32mm to round everything out.

    As for the 32mm, the pickings are slim for our 1.25" barrels. Celestron Omni or Meade 4000 have the best FOVs (52deg) that I can find so far for a reasonable price.

    You may want to look at a zoom lens too. I have seen them recommended as a first lens to help get the feel of things before taking the plunge into the more expensive, higher quality ones. They usually come in an 8mm-24mm size. Zuhmell, Celestron, Vixen and Meade are around $50 +/-.

    Remember, these fast scopes (lower focal ratio) like higher quality lenses more than the slower ones, especially at the higher magnifications. We could easily spend more on a lens that we did on the entire scope!

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  11. #17
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    Yes. to be on the safe side, reduce the max manufacturer's spec by a few numbers, and limit your EP to half of that; Get as good as you can comfortably afford with a wide field of vision and good eye relief. Then on a clear night, you may barlow it, and on ordinary nights, it will still serve well.

    I will second, third and fourth that you also get a 32mm lens! Once you have one, you will know why!

    Also, a lower price lens is still probably a hundred times better than what Galileo was using, and you can experiment with cheaper lenses without breaking the bank. Once you are more comfortable with your needs, you could splurge.
    Last edited by JamesandmyOpinion; 12-10-2011 at 07:32 AM.

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    16" ,Celestron Omni 150 XLT(My review here http://tinyurl.com/7me2mb6 ), 2"26mm 2"32mm, 32mm, 25mm, 12.5 mm, 10 mm, 6mm & 4 mm Plossl + 12.5mm, 9 mm, 5mm & 3mm Planetary. 2" & 1.25" 2x Barlows.
    Hotech 1.25" Laser Collimator.

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  13. #18
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    Quote Originally Posted by odd1 View Post
    In addition to the 20mm erect and the 10mm lenses that it comes with, I got a 2x barlow, 25mm, 17mm, and another 10mm. All from the sirius line. Not the best, but good for a start
    I use the Sirius Plossl EPs. IMO Athey are darn good inexpensive planetary EPs. You will certainly not be disappointed with them. I was tempted to pull the trigger on some UO orthos but until I Max out these guys under excellent skies I can't see the reason to spend the money. Those little Orion's get the job done.


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  15. #19
    wgwrigs's Avatar
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    thanks for all your input, i appreciate it it! im very excited myself! Does saturn have any detail in the scope? im just curious if i can see the rings! i wanted to try my hand at taking some astrophoto pictures and using a program i found online called registax.

 

 
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