10mm Or 20mm Telescope Lens. Your telescope came with two eyepieces: 400mm (telescope focal length) / 20mm (eyepiece focal length) = 20x magnification 400mm (telescope focal length) /. The “mm” refers to the measurement of the lenses, taken in milli-meters. Different size lenses will provide different levels of magnification, with a lower “mm” providing more.
When it comes to telescope lenses, the two most popular sizes are 10mm and 20mm. Choosing the right lens size for your telescope is an important decision, as it will affect the image quality of your telescope.
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What Is the Difference between 10mm and 20mm Telescope Lenses?
The main difference between 10mm and 20mm telescope lenses is the amount of light that each lens can gather. 10mm lenses gather less light than 20mm lenses, but they also provide a higher magnification. 20mm lenses gather more light, but they provide a lower magnification. Because of this, 10mm lenses are best suited for viewing bright objects, such as planets and the moon, while 20mm lenses are best suited for viewing faint objects, such as galaxies and nebulae.
In addition to light gathering ability, 10mm and 20mm lenses also differ in terms of field of view. 10mm lenses provide a narrower field of view than 20mm lenses, which means that they are better suited for observing small, detailed objects. 20mm lenses provide a wider field of view, so they are better suited for observing large objects, such as star clusters.
Finally, 10mm and 20mm lenses also differ in terms of price. 10mm lenses are typically more expensive than 20mm lenses, as they are more specialized and require more precision in their manufacture. However, the higher price of 10mm lenses is often worth it for those who need the extra light gathering power and narrower field of view.
In conclusion, 10mm and 20mm telescope lenses offer different advantages and should be chosen based on your individual needs. 10mm lenses are best suited for viewing bright objects, while 20mm lenses are best suited for viewing faint objects. 10mm lenses are more expensive, but they offer higher magnification and a narrower field of view. Ultimately, the choice between 10mm and 20mm lenses will depend on what type of objects you plan on observing with your telescope.
Celestron 10mm and 20mm basic eyepiece overview by Northern Optics
Of a similar optical design to the Skywatcher modified achromatic designs and perfect for starter telescopes. Much better build and optical quality than some other unbranded budget eyepieces. Both have their own attributes. The 10mm gives a little more magnification. The 20mm gives a wider view with good contast. It does however have an internal body wall that is a little polished, causing some reflection on light. Thank you for…
Basically the 10mm gives twice the magnification of the 20mm.The 10mm is best used for looking at the moon and planets. The 20mm is best used for star clusters,. A 10mm eyepiece would provide twice as much magnification as a 20mm eyepiece. It also means that the same eyepiece gives different magnifications on different scopes. What., 10mm Or 20mm Telescope Lens.
