Évaluations - 3, GPA: 3.7
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Facilité d'utilisation
The same formula can be applied to any of your eyepieces. Celestron offers numerous optional eyepieces to expand your range of magnification. Eyepieces come in barrel diameters of .96" and 1 'A". In general, 1 V*” eyepieces are of a higher optical quality and give you sharper images along with a wider field of view and better eye relief. Magnification through the telescope has its limits. These limits are determined by the laws of optics and the nature of the human eye. The maximum usable power (with sharp images) is equal to 60 times the aperture of the telescope (in inches). So, with a 60mm telescope it has a maximum very useful power of 142x (2.3622" x 60). Most of your viewing will be done in the range of 30x to 120x. Higher powers are used mainly for lunar and sometimes planetary observing where you can greatly enlarge the image. The images at extremely high powers like 200x to 675x magnify the image but remember that the contrast will be very low and the image somewhat blurred due to the super power. For the brightest images with the most contrast, use the lower powers with a smaller image scale. Optional Accessories Celestron offers a full line of optional accessories for your Novice or Firstscope telescope. Please consult the Celestron Accessory Catalog (#93685) for a complete description. One of the best things you can buy to get started with this hobby is a set of good star charts like Celestron’s Sky Maps (#93722). - SCRE »V5 -FINDER SCOPE )-^LENS cap 'LENS SHADE DIAGONAL FLAMGE WING NUT—* TELESCOPE TUBE ALTITUDE SLOW MOTION ROD ASSEMBLY- (on firstscope 60 TOC US KNOB telescopes only). ALTAZIMUTH MOUNT ■ADJUSTMENT HOLE _altitude adjustment SCREW SCREW &—EWCC£ J RED I ■SCREWS ACCESSORy TRAY adjustment V/ING NUT SCREW WING NUTS TRIPOD LEGS 6 SPECIFICATIONS 21051-W 21058 21054 21055 21055-DX Aperture (Diameter) of Lens (mm) 50 60 60 60 60 Focal Length (mm) 625 700 900 700 700 Focal Ratio (f#) 12.5 11.7 15.0 11.7 11.7 Finderscope 5x20 5x24 5x24 5 x 24 5x24 Hybrid Diagonal - .96" - 90° Uses .96" & 1 Vi" Eyepieces Yes Yes Yes Yes Yes Eyepieces (in mm) H 12.5 (5 Ox) .96" H 20 (35x) .96" H 20 (45x) .96" H 20 (35x) .96" SMA25 (28x) 1 Vi" H8 (78x) .96" H12.5 (56x) .96" H8 (113x) .96" SR6 (117x) .96" SMA 10 (70x) 1 l/4" SR 6 (117 x) .96" Telescope Tube Color W W B B B (W) Glossy White (B) Glossy Black 2x Barlow Lens Included - .96" No No Yes Yes No Tripod Type W W W W W (W) Black Wood / (A) Aluminum 21055-DX-AL 60 700 11.7 5x24 Yes H 20 (35x) 1
Instruments d'optique - 21051-W (371.76 kb)
Instruments d'optique - 21055-DX-AL (371.76 kb)
Instruments d'optique - 21058 (371.76 kb)
Instruments d'optique - 21054 (371.76 kb)