Apochromatic Barlow expected real ED glass for correcting the off-axis coma in Newton telescopes
This Barlow allows you to observe planets and deep sky objects at the edge of the 1,25″Okularfeldes with similar quality on the axis. In particular Dobson owners so much that can hold the object never exactly on the axis.
The coma corrected field is designed for APS-C format. Because of their unique quality these Apo-Barlow supplies but also to telescoping systems such as refractors or Schmidt-Cassegrain an image quality that is unmatched by almost any other Barlow on the market.
This new improved koma corrective ED Barlow lens is a focal ratio of f / 4 parabolic optimiert.Diese Barlow has as ED-member Chinese ED glass FK61 (comparable to Ohara FPL51), is cemented and covered on both sides with a broadband multi-coating, which by a transmission over 99% in the range of 400 nm to 700 nm has.
| Capacity |
| Magnification factor |
2,7 |
| Connection (to the telescope) |
1,25″ |
| Free transmission (mm) |
22 |
| Number of lenses |
2 |
| Connection |
M 28,4 |
| Mount material |
Aluminium |
| Appropriate for telescopes |
Newton f/4 |
| Focal length (mm) |
-62,9 |
| Coating of optical system |
multiple |
| Transmission |
99 |
| General |
| Length (mm) |
18,5 |
| Weight (g) |
50 |
