What makes the Baader 2" BBHS® diagonal different from a standard dielectric diagonal?
The key difference is the coating technology. Standard dielectric diagonals reflect a limited slice of the visible spectrum, which can subtly alter color balance. The Baader BBHS® (Broad Band Hard Silver) diagonal uses a protected silver coating that reflects a much wider spectrum of light, resulting in more accurate, vibrant colors and higher overall image brilliance.
When should I choose this BBHS® mirror diagonal over a prism diagonal?
As a general rule, mirror diagonals are recommended for telescopes with fast focal ratios (typically f/7 or faster). In these systems, a mirror like the BBHS® maintains higher image quality and avoids introducing the optical aberrations that a prism can in a converging light cone. Prisms are often preferred for slower instruments (f/8 and above).
Can I adjust the collimation of the 2" BBHS® mirror diagonal myself?
Yes, the mirror is mounted in an adjustable cell, allowing for precise collimation. This is a powerful feature for advanced users who need to ensure perfect alignment in their optical train. However, please be aware that altering the factory settings will void the warranty on the factory collimation, though the product's overall warranty remains intact.
How does the 2" ClickLock clamp on the BBHS® diagonal work?
The Baader ClickLock clamp is a premium alternative to simple thumbscrews. A gentle twist of the rubberized collar engages a three-point clamping system that holds your eyepiece or camera securely and perfectly centered on the optical axis. It provides a very strong, non-marring grip and eliminates the possibility of your accessories tilting in the focuser.
How does the Baader 2" BBHS® diagonal improve views of Jupiter through my f/5 APO refractor?
In a fast, high-contrast telescope like an f/5 APO, the BBHS® diagonal provides two main benefits for viewing Jupiter. First, its broad spectral reflection ensures you see the planet's cloud bands with maximum color fidelity, revealing subtle reds, browns, and tans that a dielectric might suppress. Second, the complete absence of stray light from the silver coating results in higher contrast, making it easier to resolve fine details like small ovals and festoons within the zones and belts.
Can I use 2" filters with the BBHS® diagonal?
Yes. The Baader 2" BBHS® diagonal is designed with filter use in mind. You can thread a 2" filter onto the telescope-side barrel as with any diagonal. Uniquely, you can also permanently install a 2" filter on the eyepiece-side of the 2" nose-piece, where it can serve as a dust protector for the mirror while leaving the primary filter threads available for other uses.
