Askar SQA55 Quintuplet Refractive Astrograph (SQA55) energy rejection filter and 1/4”-20

and 1/4”-20

SCTs must use an off axis ERF

The slots drilled along or vertical to the length provide more possible spacing so the users may have more options and versatility in practical attachments

High Magnification

Steep bandpass filters to eliminate UV and IR interference

Askar SQA55 Quintuplet Refractive Astrograph (SQA55) energy rejection filter and 1/4”-20Introducing the Askar SQA55 55mm f 4. 8 Petzval Astrograph, where precision optics meet cutting edge design to redefine astrophotography. Engineered for celestial enthusiasts and professionals alike, this revolutionary lens combines the classical Petzval design with modern optical advancements, delivering unparalleled clarity and breathtaking detail in capturing the wonders of the night sky. SQA55 Features Petzval Lens Structure: Self flattened