Given that you've already ordered the zoom eyepiece you might as well wait for that to arrive and then test how well the image holds up. To get nice sharp views of planets you have to drop down to the 25-30x region, perhaps being able to go a little higher on the moon. Would you agree with that? Or do you think I would waste my money if I bought this Barlow lens because I would still get blurry visuals it?Īs far as I am concerned the 50-60x limit is the limit for technically being able to separate double stars when diffraction causes each star to appear as a series of concentric rings (known as the airy disk). It is not perfect but it, or one of the many clones available under different branding, will do a reasonably good job of giving you higher magnifications when used with your zoom and other eyepieces. The Celestron 8-24 zoom lens will also be useful for such targets.įor a 2x barlow lens at a low cost but reasonable quality I would suggest this one: Far too much magnification for your scope.ġ40x magnification would be the absolute limit with your scope I think and that would assume very good observing conditions and quality optics plus the right targets eg: Saturn, the Moon or double stars.įor many other objects such as star clusters and the bright galaxies and nebulae you will not need to use high magnifications so the 10mm and 25mm eyepieces will be fine. The barlow lens that your link leads to seems to be a 5x one. Would you agree with that? Or do you think I would waste my money if I bought this Barlow lens because I would still get blurry visuals it? Edited Jby erseavetir And I've searched Amazon a little bit and for my budget, this seems to be the best Barlow lens for me: If this is all true, and I would get the same clear views that I am getting with 10 mm eyepiece on 2x Barlow lens with twice closer visuals and with same clarity then I believe it would be worth it to get a 2x Barlow lens. If this is true, a 2x Barlow lens would work great with the 10mm eyepiece on my telescope as that would be equal to exactly 140 magnification power. ![]() My telescope's aperture is 2.8 inches and times that by 50 gives us 140 clear magnification power (according to him as far as I understood). With good seeing, this will give you decent views of Jupiter and Saturn and the moon. So now we have 700mm scope focal length divided by 10mm eyepiece focal length = 70X times a 2X barlow to equal 140X magnification. 50 X 3 = 150X, a much more reasonable magnification. A good rule of thumb would be 50X your aperture in inches. So, with your 10mm eyepiece and the 3X barlow, that puts you at around 210X magnification, which in my opinion is pushing this apertureto its limits. "With the limited aperture of that scope, 70mm or just under 3 inches, the amount of magnification you can reasonably use ll be considerably less than the 400+ listed on the box. However, I am a little confused now because someone else on another forum told me this: What do you guys think? I would really appreciate any answers. I assume maybe I won't need to buy the 5mm eyepiece for better viewing if the 2x Barlow lense will work with my 10mm eyepiece or with the Celestron 8-24mm Zoom Eyepiece. I saw 2 Barlow lenses that were made by SVBONY and Solomark that are around $16 but I don't know if they are the right ones for our telescope and I wouldn't know which one to buy. ![]() Do you think a 2x Barlow lens would be better for our telescope? If so, what is the best 2x Barlow lens that I can buy below $30. Another question I have is that the 3x Barlow Lens that I have is making the view blurry and not clear like when I don't use the Barlow lens. ![]() Now my question is: Do you think a 5mm eyepiece would work well with my telescope? If so, what is the best 5mm eyepiece that I can buy below $30. I also assumed it would be a better quality eyepiece than the eyepieces that came with the telescope. My father's old "BRESSER TRAVEL 20-60X60 SPOTTING SCOPE" that our cat destroyed had a zooming option that my father loved so after some research, I've also ordered the "Celestron 8-24mm Zoom Eyepiece (1.25")" from amazon and I hope it will work well with the telescope when it arrives in a week. It came with the 10 and 25mm eyepieces and a 3x Barlow lens. ![]() I have the Gskyer AZ70700 Refractor Telescope that I bought from amazon for my father and we have been using it for a week. Hello all! I am a total noob and I have an eyepiece and a Barlow lens question:
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