Askar SQA106 - 106 mm f/4.8 Super Quintuplet Astrograph - SQA106 Focal Reducers The Explore Scientific 9mm 120°

The Explore Scientific 9mm 120° Series™ eyepiece really is in a class by itself

Series 5000

but also has a protective layer of SiO2 (quartz) for durability

10:1 Crayford type focuser

Fork Arm: Dual fork arm

Askar SQA106 - 106 mm f/4.8 Super Quintuplet Astrograph - SQA106 Focal Reducers The Explore Scientific 9mm 120°Askar SQA106 Petzval Astrograph 106 mm f 4. 8 The Askar SQA106 is an air spaced quintuplet Petzval refractor OTA with an aperture of 106mm, a focal length of 509mm, and a native focal ratio of F4. 8. The lens structure used in this 4" astrograph provides beautiful contrast, color rendition and sharpness but is self flattening as well. There is need to add separate flatteners and you will not be required to calculate a specific back focus, making this