Beschreibung
- Verwendbar an den SD81S, SD103S und SD 115S
- Auch für die Vixen ED Teleskope geeignet
- Geeignet für Vollformat Kameras
- Gestochen scharfe Sternabbildungen bis zum Rand
- AS Beschichtung (99% Transmission pro Linsenfläche)
- Optik: 2 Elemente in 1 Grppe
- Gewicht 218 g
Note: #38751 Wide Photo Adapter 60DX is NOT INCLUDED in Art.#37246.
- Hohe Lichttransmission
- Ebenes Bildfeld bis zum Rand
- Sehr hoher Kontrast
- Verwendbar an den SD81S, SD103S und SD 115S
- Optik: 2 Elemente in 1 Grppe
- Geeignet für Vollformat Kameras
- Gewicht 218 g
- SD Bildfeldebener HD Kit
- Adapterring für SD81
- 66 mm Verlängerungs Hülse
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.
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 an image circle, largely improving sharpness over the entire imaging field.
| 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) |
■ Covering the 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 the field of view closely maintaining the original focal length of the SD-series optical tubes, fully covering the imaging field of the DSLR camera with the full-format sensor at an image circle of 44mm diameter.
■ 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 an 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 a DSLR camera. Full-format (36x24mm), APS-C (23x16mm), and Four Thirds(17.3x13mm) are typically available standards for DSLR cameras. In general, the larger the light-receiving plane, the larger the range can be shot.
