In this very first section of my wish list (Themes : optical gadget)
1. Celestron Powerseeker 80EQ Telescope
Optical Design | Refractor |
---|---|
Aperture (mm) | 80 mm (3.15 in) |
Focal Length (mm) | 900 mm (35 in) |
Focal Ratio | 11 |
Eyepiece 1 (mm) | 20 mm (0.79 in) |
Magnification 1 | 45 x |
Eyepiece 2 (mm) | 4 mm (0.16 in) |
Magnification 2 | 225 x |
Barlow Lens | 3 x |
Finderscope | 5×24 |
Star Diagonal | 1.25″ Erect Image Diagonal |
Mount | German Equatorial |
Accessory Tray | No-Tool Tray with Eyepiece holder |
Tripod | Aluminum |
Weight (lbs) | 19 lbs (8.62 kg) |
Highest Useful Magnification | 189 x |
Lowest Useful Magnification | 11 x |
Limiting Stellar Magnitude | 12 |
Resolution (Rayleigh) | 1.74 arc seconds |
Resolution (Dawes) | 1.45 arc seconds |
Photographic Resolution | 162 line/mm |
Light Gathering Power | 131 x |
Angular Field of View (deg) | 1.2 ° |
Linear Field of View (@1000 yds) | 61 ft (19 m) |
Optical Coatings | Multi-Coated |
Optical Tube Length | 38 in (965 mm) |
Telescope Weight | 19 lbs (8.62 kg) |
2. EFS 55-250mm f/4-5.6 IS II CANON LENS
This telephoto zoom lens is designed with Canon’s Optical Image Stabilizer technology while retaining compactness and lightness, in response to demands of photographers. This high zoom ratio lens is equivalent to a focal length of 88-400mm in the 35mm format (when used on Canon EOS cameras compatible with EF-S lenses), and the image stabilizer effect equivalent to a shutter speed about 4 stops faster than the same size lens without Image Stabilizer. In other words, if the slowest shutter speed you could formerly hold a 250mm lens steadily was 1/250th of a second, with Canon’s 4-stop stabilization correction, you could hand-hold at shutter speeds as slow as 1/15th of a second. It also uses a UD-glass lens element to correct chromatic aberration for excellent image quality throughout the zoom range. This new EF-S telephoto lens with great features delivers excellent performance at an affordable price for all photographers.
Focal Length & Maximum Aperture | 55-250mm f/4-5.6 |
Lens Construction | 12 elements in 10 groups, including one UD-glass element |
Diagonal Angle of View | 27° 50′- 6° 15′ (with APS-C image sensors) |
Focus Adjustment | DC motor, gear-driven (front focusing design) |
Closest Focusing Distance | 3.6 ft./1.1m (maximum close-up magnification 0.31x) |
Filter Size | 58mm |
Max. Diameter x Length, Weight | 2.8 in. x 4.3 in./70 x 108mm (maximum lens length); 13.8 oz./390g |
well then.. kedua barang tersebut punya harga masing2 berkisar di 2,5 jt.. so.. ayo menabung.. wkwkwkwkwkw..