Antlia 1.25" Adjustable Aperture Diaphragm for 5Å CaK Solar Discover Assembly

When using the Solar Discover 5Å CaK Assembly, the Antlia 1.25" variable aperture diaphragm helps filter out stray light, enhancing image contrast. It allows for real-time adjustment, reaching optimal contrast at approximately half open (D=12 see second image above), or it can be fine-tuned as needed for a specific condition.

• Adjustable aperture range: Dia 2.0 - 25mm
• Adapter: 1.25''
• Optical height: 34mm