Vixen Telescope Focal Reducer HD

Hign-performance Reducer for AX103S and VC200L Telescopes.

Hign-performance Reducer for AX103S, VC200L telescopes. Reduces focal length by 0.77x.

Applicable to AX103S

The AX103S optical tube incorporates a flattener lens and outperforms high imaging capability even by itself. From this reason, the Reducer HD can be used without using the SD Flattener HD. The AX103S covers an imaging field of DSLR camera with full-format sensor with 44mm image circle.

Applicable to VC200L

Originally incorporating a flattener lens inside, the VC200L optical tube offers high imaging capability by itself. From this reason, the Reducer HD can be used without using the SD Flattener HD together. The VC200L delivers 36mm image circle (peripheral illumination by 60%) fully covering an imaging field of DSLR camera with APS-C sensor, and also offers comparably sharp images with the center in spite of 47% peripheral illumination at dia. 44mm image circle. It covers an imaging field of DSLR camera with image circle of dia. 28mm with APS-C sensor and dia. 44 with full-format sensor.

High Contrast

The same anti-reflective AS coatings, which are used fo our high-end VSD100F3.8 Astrograph, are used to take advantage of 99.9% superb high transmission of light per lens surface. Loss of light, ghost and flare images are eliminated substantially due to the complete matte finish inside.

Applicable to SD series telesopes by using SD Flattner HD Kit(sold seperately) together

Applicable to SD 81S, SD103S and SD115S telesopes by using SD Flattner HD Kit(sold seperately) together. While keeping image circle as Φ44mm, reduces focal length by 0.79x (f/7.7→f/6.1) and largely improves sharpness over the entire imaging field of the DSLR camera with full-format sensor.

Example Image with AX103S + Reducer HD : M8 Lagoon Nebula, M20 Trifid Nebula

About Full-format and APS-C is a common name for size representing the size of the light receiving plane (imaging sensor or film) of DSLR camera. Full-format (36x24mm), APS-C (23x16mm) and Four Thirds (17.3x13mm) are typical available standard for DSLR cameras. In general, the larger the light receiving plane, the larger the range can be shot.

Example image with VC200L + Reducer HD : M101 Pinwheel Galaxy

System Structure Diagram