SD Flattener HD Kit (Art. #37246)

Note: #38751 Wide Photo Adapter 60DX is "Not included" in the Art.#37246.

■ Extraordinary High Contrast

The same anti-reflective AS coatings, which are used for 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.

■ Ultra sharp image over entire imaging field on DSLR full-format sensor

Using in combination with the optional Reducer HD(Art. #37247), the focal length will be reduced by 0.79x (F7.7→6.1). While maintaining image circle, largely improving sharpness over the entire imaging field.

<SPECIFICATION - SD Flattener HD Kit>

Optical Tube	SD81S / SD103S / SD115S
Focal Length	625mm / 795mm / 890mm
Magnification	1,03x / 1,02x / 1,02x
Focal Length	644mm / 811mm / 908mm
F-Ratio	7,9 / 7,9 / 7,9
Image Circle (Dia.) *1	44mm / 44mm / 44mm
Peripheral Illumination	89% / 83% / 80%
Lens Elements	2 elements in 1 group
Coating	AS Coating(Over 99,9% light transmission on every single surface)
Dimensions / Weight	Dia.58x x34mm / 111g
Accessory	EX Tube 66(Dia.68mm x76mm, 89g), Spacer Ring SD81(Dia.57.5mm x 22.5mm, 18g)

<Features of the SD Flattener HD>

■ Covering entire imaging-field of DSLR with full-format
The kit consists of the high performance flattener lens and connecting rings (Spacer Ring SD81, EX Tube 66) designed for the SD81S, SD103S and SD115S optical tubes.

■ Ultra sharp image over entire imaging field on DSLR full-format sensor
The SD flattener HD improves the flat-field performance toward the edge of field of view closely maintaining the original focal length of the SD-series optical tubes, fully covering the imaging field of DSLR camera with full-format sensor at image circle of 44mm diameter.

Photo taken with the SD Flattener HD

<Vixen SD103S>

■ Ultra sharp image over entire imaging field on DSLR full-format sensor
Using in combination with the optional Reducer HD(Art. #37247), the focal length will be reduced by 0.79x (F7.7→6.1). While maintaining image circle, largely improving sharpness over the entire imaging field.

■ Example image with SD103S+SD Flattener HD: M3 Globular Cluster

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.