The Televue dielectric diagonal is often regarded as a high-quality accessory for telescopes, and whether it’s worth investing in often depends on several factors.
Firstly, dielectric diagonals, including those from Televue, are known for their high reflectivity and durability. These diagonals use multiple layers of dielectric coatings, which can reflect around 99% of the light, providing brighter and more accurate image reproduction. Additionally, these coatings are more durable and resistant to scratching compared to traditional aluminum coatings, making them a long-lasting choice.
If you are an avid amateur astronomer or even a professional looking for the best visual experience, the Televue dielectric diagonal could be a valuable addition to your setup. It can enhance the quality of the views you get through your telescope, noticeably improving image clarity and contrast. This can be particularly beneficial when observing fine planetary details or deep-sky objects.
For those using high-quality optics, such as APO refractors or premium reflectors, investing in a top-tier diagonal like the Televue model ensures that you are not compromising the optical path. In essence, it complements the overall high performance of your optical system.
However, if you’re just a casual observer or have a lower-end telescope, the benefits may not be as noticeable, and the investment might not be justified given its price point. In such cases, other telescope upgrades might offer more significant improvements per dollar spent.
In summary, the Televue dielectric diagonal is generally considered worth it for those who seek premium optical performance and are willing to invest in their observing setup.