Vixen Reducer HD for Vixen FL55SS fluorite apochromatic refractor
The Vixen Reducer HD for Vixen FL55SS apochromatic refractor includes the aplanatic focal reducer for FL55SS only. In order to correctly use it you will need the field flattener Flattener HD for Vixen FL55SS sold apart or in kit. Advanced Vixen AS Coating with 99.9% light transmission on each surface.
Vixen Reducer HD for Vixen FL55SS fluorite apochromatic refractor
The Vixen Reducer HD for Vixen FL55SS apochromatic refractor includes the aplanatic focal reducer for FL55SS only.
In order to correctly use it you will need the field flattener Flattener HD for Vixen FL55SS sold apart or in kit. When both parts are used you can take amazing wide-field pictures of the deepsky with digital cameras or CCD/CMOS up to full-frame format (24x36 mm).
On the Vixen FL55SS optics you can use the Flattener HD only in order to get a corrected field with the highest edge illumination possibile. The field flattener enlarge focal length by 1.04x delivering a focal lenght of 312 mm (focal ratio becomes around F/5.7). With the Reducer HD for FL55SS the focal ratio goes down to F/4.3 for a focal leght of 237 mm.
Vixen AS Coating
All the new high performance correctors by Vixen include the highly renowned Vixen AS Coating that ensures over 99.9% light transmission for each optical surface. It is the same coating used also in the Vixen flagship VSD 5-lens astrograph. This advanced coating cuts down to a negligible effect any possibile loss of light and any ghost or flare image.
Reducer HD for FL55SS specifications (to be used along the Flattener HD for FL55SS)
| Magnfication | 0,79x |
|---|---|
| Resulting focal length | 237 mm |
| Focal ratio | F/4.3 |
| Image circle *1 | 44 mm |
| Peripheral illumination | 86% |
| Optical design | 3 elements in 3 group |
| Coating | Vixen AS Coating (over 99,9% light transmission for each lens surface) |
*1 : Over 60% is considered an acceptable value in photography. Field correction covers an imaging field of 44 mm big enough to cover the full-frame APS format (24 x 36 mm) and much higher than APS-C format (28.8 mm).
Vixen FL55SS Spot diagrams
Vixen FL55SS spot diagrams at prime focus without correctors (F/5.5)
Vixen FL55SS spot diagrams at prime focus with Flattener HD for FL55SS field flattener and Reducer HD for FL55SS focal reducer (F/4.3)
Example images
The North America nebula complex in Cygnus taken with Vixen FL55SS, Flattener HD for FL55SS field flattener and Reducer HD for FL55SS focal reducer
System Chart
| Product Status | New |
|---|---|
| Package width | 10 cm |
| Package height | 8 cm |
| Package depth | 10 cm |