Why is the 24mm clear aperture of the Baader Amici Diagonal important?
The 24mm clear aperture is crucial for low-magnification, wide-field viewing. Many standard 1.25" diagonals use smaller prisms (around 19mm) that physically block a portion of the light cone when used with wide-field eyepieces. This Baader diagonal's larger aperture prevents that "keyhole" effect, ensuring a bright, fully illuminated view right to the edge of the field.
Is the Baader 45° Amici Diagonal suitable for astronomical observing?
While designed for terrestrial use, it can be used for casual astronomical viewing. However, Amici prisms inherently have a tiny ridge in the prism that can create a faint diffraction spike on very bright objects like Jupiter or bright stars. For critical planetary or deep-sky observation, a standard mirror or prism star diagonal is optically superior.
How will the Baader Amici Diagonal perform with a 32mm Plössl eyepiece for birdwatching?
It will perform exceptionally well. A 32mm Plössl is a classic low-power eyepiece that benefits greatly from the diagonal's 24mm clear aperture. You will get a bright, wide, and correctly oriented view without the edge-of-field dimming common with lesser diagonals, making it ideal for spotting birds against a complex background.
What does "Amici Prism" mean and why is it 45°?
An Amici prism, or roof prism, is an optical design that corrects the image both vertically and horizontally. This provides a view that is identical to what you see with your naked eye (not mirror-reversed), which is essential for terrestrial use. The 45° angle provides a much more comfortable viewing position for looking at objects on or near the horizon compared to a 90° astronomical diagonal.
Will I need to re-focus when switching to the Baader 45° Amici Diagonal?
Yes, you will likely need to adjust focus. Different diagonals have different optical path lengths, meaning they change the point where the telescope's image comes to focus. This is normal and easily corrected by turning your telescope's focuser knob.
Can I use the Baader Amici Diagonal with my 80mm f/7 refractor for scenic viewing?
Absolutely. An 80mm f/7 refractor is a perfect match for this diagonal. It will turn your telescope into a high-quality spotting scope, providing crisp, correctly oriented views of distant landscapes, ships at sea, or wildlife. The 24mm aperture ensures you can take full advantage of low-power eyepieces for the widest possible vistas.
