- #1
josue2503
- 13
- 0
can i use a watch glass as a primary mirror of dobsonian telescope?
Technically, yes, a watch glass can be used as a primary mirror for a dobsonian telescope. However, it is not recommended as it is not designed for this purpose and may not provide the necessary precision and clarity for astronomical observing.
The main drawback of using a watch glass as a primary mirror is its small size. Watch glasses are typically much smaller than the standard size of a dobsonian telescope's primary mirror, resulting in a smaller field of view and less light-gathering capability. Additionally, watch glasses are not designed for the precise curvature and reflective coatings needed for a telescope's primary mirror.
The only potential advantage of using a watch glass as a primary mirror is its low cost. However, this is outweighed by the drawbacks mentioned above and the fact that a proper primary mirror is essential for a functioning telescope.
In terms of performance, a watch glass cannot compare to a standard primary mirror. Standard mirrors are specifically designed for telescopes and are larger, have better optical quality, and can be coated with reflective materials to enhance their performance. A watch glass simply cannot provide the same level of clarity and precision.
While it may seem like a quick fix, using a watch glass as a temporary replacement for a damaged primary mirror is not recommended. As mentioned before, watch glasses are not designed for this purpose and may not provide the necessary level of performance for astronomical observing. It is best to properly repair or replace the damaged primary mirror for optimal telescope performance.