Cstar "All in 1" Series 60 x 700mm Full-Size Refractor Telescope
CStar Optics
- 60-700
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Cstar "All in 1" Series 60 x 700mm Full-Size Refractor Telescope
The CstarŪ 60x700mm refractor telescope is designed for the beginning and novice astronomer to view the
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This is the perfect example of the kind of scope astronomers warn beginners against.
The first red flag is the ridiculously high maximum magnification of over "700x." Do you know what you will see at 700x in this scope? Nothing but a dim blur. Note that the objective (main) lens is 60mm. All telescope optics have inherent limitations; maximum useful magnification per millimeter of aperture is about 2x. Therefore, with any attempt to use this scope at magnification of over 120-140x, increase in image size will be more than offset by breakdown, and that's even assuming the quality of the objective lens is any good.
The finder is useless: a 6x30 is barely adequate, and this one does not even meet that standard. Using it for anything but the moon will be an exercise in frustration. The "H" on the low-power eyepiece indicates a Huygens eyepiece, a cheap and antiquated design with a field of view so narrow it is not unlike looking through a drinking straw. For not much more money the marketers
The first red flag is the ridiculously high maximum magnification of over "700x." Do you know what you will see at 700x in this scope? Nothing but a dim blur. Note that the objective (main) lens is 60mm. All telescope optics have inherent limitations; maximum useful magnification per millimeter of aperture is about 2x. Therefore, with any attempt to use this scope at magnification of over 120-140x, increase in image size will be more than offset by breakdown, and that's even assuming the quality of the objective lens is any good.
The finder is useless: a 6x30 is barely adequate, and this one does not even meet that standard. Using it for anything but the moon will be an exercise in frustration. The "H" on the low-power eyepiece indicates a Huygens eyepiece, a cheap and antiquated design with a field of view so narrow it is not unlike looking through a drinking straw. For not much more money the marketers
...
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This is the perfect example of the kind of scope astronomers warn beginners against.
The first red flag is the ridiculously high maximum magnification of over "700x." Do you know what you will see at 700x in this scope? Nothing but a dim blur. Note that the objective (main) lens is 60mm. All telescope optics have inherent limitations; maximum useful magnification per millimeter of aperture is about 2x. Therefore, with any attempt to use this scope at magnification of over 120-140x, increase in image size will be more than offset by breakdown, and that's even assuming the quality of the objective lens is any good.
The finder is useless: a 6x30 is barely adequate, and this one does not even meet that standard. Using it for anything but the moon will be an exercise in frustration. The "H" on the low-power eyepiece indicates a Huygens eyepiece, a cheap and antiquated design with a field of view so narrow it is not unlike looking through a drinking straw. For not much more money the marketers
The first red flag is the ridiculously high maximum magnification of over "700x." Do you know what you will see at 700x in this scope? Nothing but a dim blur. Note that the objective (main) lens is 60mm. All telescope optics have inherent limitations; maximum useful magnification per millimeter of aperture is about 2x. Therefore, with any attempt to use this scope at magnification of over 120-140x, increase in image size will be more than offset by breakdown, and that's even assuming the quality of the objective lens is any good.
The finder is useless: a 6x30 is barely adequate, and this one does not even meet that standard. Using it for anything but the moon will be an exercise in frustration. The "H" on the low-power eyepiece indicates a Huygens eyepiece, a cheap and antiquated design with a field of view so narrow it is not unlike looking through a drinking straw. For not much more money the marketers
...
more
