Panduan Singkat Memilih dan Membeli Teleskop by nggieng

Memilih teleskop itu sepertinya membingungkan ya? Apalagi harga teleskop yang lumayan mahal, dengan dana terbatas, pasti jadi bingung. Berikut ini saya coba memberi sedikit tip, kalau memang berminat untuk memiliki teleskop sendiri.
Pertama, bicara tentang teleskop, kita pasti sering mendengar atau secara spontan kepikir, teleskop ini bisa memperbesar sampai berapa kali? Bisa sampai jutaan kali? Wow .. kalau memang demikian adanya, astronom gak punya kerjaan, karena gak usah susah-susah untuk setiap malam mengamati, cukup dengan mengintip teleskop, semua bisa melihat permukaan Mars seperti melihat halaman tetangga. Ini merupakan kesalah-kaprah-an yang memang dialami oleh banyak orang.
Jadi sekarang harus diluruskan, fungsi teleskop itu apa? Untuk melihat benda yang jauh? Untuk memperbesar citra dari obyek yang jauh, mmm, fungsi teleskop adalah untuk: Mengumpulkan cahaya!! Seperti juga fungsi mata kita, mata kita hanya bisa ‘melihat‘ jika ada cukup cahaya yang datang dari obyek yang kita amati sampai ke mata kita. Jadi fungsi teleskop adalah sebagai alat bantu mata untuk mengumpulkan cahaya lebih banyak dari mata kita bisa lakukan, sehingga informasi yang sangat-sangat redup (misalnya karena jauhnya) bisa teramati.
Dengan demikian, apa yang menjadi penting dalam memilih teleskop? Yang pertama harus dilihat adalah: Apertur, bukaan, atau diameter teleskop. Ibarat ember itu teleskop untuk menampung hujan (cahaya), makin besar diameter, makin mudah air hujan tertampung. Dengan demikian, penting untuk diingat, bahwa bukan diameter yang terpenting, tapi luas permukaan ember yang menentukan. Sebagai contoh, jika ember mempunyai diameter sebesar 20 cm (standard teleskop tipe Schmitdh-Cassegrain, jenis dan ukuran teleskop yang paling populer), akan mempunyai kemampuan mengumpulkan cahaya empat kali daripada yang 10 cm, karena luas lingkaran adalah berbanding kuadrat.
Jadi makin besar makin baik? Tidak juga, semua ada batasnya, pergolakan udara di atmosfer menjadi kendala pengamatan; pengamatan menggunakan teleskop terbaik di seluruh muka bumi ini mempunyai batas resolusi antara 0,5-2 detik busur, bergantung pada lokasi; dengan resolusi 0,5 detik busur diperoleh menggunakan teleskop dengan diameter 30cm, sedangkan semakin besar, tidak bisa memberikan resolusi yang lebih baik, kecuali mengumpulkan lebih banyak lagi cahaya. Jadi, kita sudah bisa memperkirakan dengan dana yang kita punya, berapa diameter yang kita inginkan.
Tapi apertur bukanlah alasan tunggal, seperti yang sudah diungkapkan di atas, fator resolusi itu penting, resolusi adalah seberapa baik teleskop memisahkan dua obyek yang berdekatan (contoh: bintang ganda). Mempertimbangkan ‘dimana’ kita mengamat juga harus diingat, karena, seperti di semua tempat di daerah tropis dengan kelembaban tinggi, menyebabkan reduksi yang sangat besar pada resolusi pengamatan, sehingga, diameter 20 cm atau 30 cm bisa jadi memberikan hasil yang ‘sama saja’.
Lalu, itu saja pertimbangannya? Pernah perhatikan bahwa ada teleskop yang ukurannya panjang, pendek? Ada satu faktor yang perlu diperhatikan, yaitu panjang fokus. Panjang fokus adalah panjangnya jarak yang harus ditempuh cahaya dari lensa obyektif (teleskop refraktor) atau cermin utama (reflektor) ke suatu titik dimana cahaya itu difokuskan. Gampangnya, gambarnya fokus itu butuh berapa jauh? Makin jauh panjang fokus, makin besar bayangan pada titik fokus. Gambarannya, seperti LCD proyektor dan layarnya, berapa jauh jaraknya? Pindahkan layarnya menjauh, gambar dari LCD proyektor akan membesar, tapi makin redup.
Jadi, panjang fokus itu penting untuk menentukan pembesaran. Makin panjang fokusnya, makin besar pembesaran yang bisa diperoleh, tentu saja dengan mempertimbangkan adanya pembatasan yang ada, tapi dengan menyertakan lensa okuler untuk pengamatan, berapa besar bisa dihitung. Perbesaran teleskop merupakan hubungan panjang fokus dbagi panjang fokus okuler yang kita pergunakan. Misalnya kita punya teleskop dengan panjang fokus 1000mm, kita mempergunakan okuler seukuran 50mm,maka kita mendapatkan perbesaran sebesar 1000mm/50mm=20x.
Jadi, sepanjang hanya melakukan kegiatan mengamati, kita bisa menentukan berdasarkan spesifikasi yang ada pada teleskop, pengamatan apa saja yang mungkin bisa dilakukan.
Lalu bagaimana jika kita ingin melakukan fotografi? Ada satu istilah yang biasa digunakan oleh penggemar fotografi, yaitu Fokal Rasio. Fokal rasio merupakan perbandingan antara panjang fokus dibagi lebar diameter. Ini lebih penting alih-alih panjang fokus, karena biasanya fotografer astronomi akan mengganti okulernya dengan kamera.
Pengaruh fokal rasio tidak terlalu terasa secara visual, tapi sangat menentukan secara fotografi, karena menentukan seberapa cepat gambar diambil menggunakan teleskop. Jika fokal rasio yang lebih kecil dikatakan cepat, sedangkan fokal rasio yang lebih besar dikatakan sebagai lambat. Sebagai contoh f/5.6 lebih cepat dari f/10, yang memberikan efek yang berbeda secara fotografi.
Baiklah, kita sudah membahas aspek-aspek yang teoritis dalam memilih teleskop, sekarang kita memilih hal-hal yang lebih nyata. Yaitu, memilih teleskop itu sendiri:
Seperti yang telah dibahas, ada tiga jenis rancang-bangun teleskop, reflektor, refraktor dan katadioptrik.
Jadi saya langsung membuat review sederhana:
Refraktor. Jika anda seorang pemula yang hanya sekedar ingin melihat-lihat, bisa melihat langit atau alam, refraktor adalah pilihan yang baik. Cukup memilih refraktor dengan tipe obyektif yang akromatik. Tapi jika anda ingin mendapatkan citra langit yang baik baik, baik secara visual maupun fotografi, pikirkan refraktor apokromatik yang tentu saja lebih mahal.
Reflektor. Teleskop Newtonian adalah yang terbaik untuk pemula, dengan syarat tidak melakukan fotografi, tapi paling tidak teleskop ini lebih irit biaya.
Katadioptrik. Dari pengamatan benda jauh, pengamatan planet, sampai pencitraan, yang berarti bisa digunakan pada hampir semua kegiatan pengamatan; pilihan terbaik jatuh pada Schmidt-Cassegrain. Tentu saja dengan harga yang, lumayan.
Itu adalah pilihan jenis-jenis teleskop, lalu bagaimana dudukannya?
Dudukan teleskop bisa jenis Altazimuth, atau Equatorial, tergantung pada tingkat keseriusan pengamatan.
Jadi rekomendasi saya:
1. Pengamatan Siang/Malam
Teleskop: Semua, Diameter: 70mm-150mm, Panjang Fokus: Terserah, yang gampang dibawa saja. Refraktor bagus untuk medan lebar, Cassegrain untuk medan sempit/planet.
Dudukan: Altazimuth
2.Pengamatan Bintang/Langit Malam
Teleskop: Newtonian/Schmidt-Cassegrain, Diameter: 150mm atau lebih.
Dudukan: Altazimuth; Equatorial (jika ingin fotografi)
3. Astrofotografi
Teleskop: Refraktor (Apokromatik)/Schmidt-Cassegrain
Dudukan: Equatorial
4. Pertimbangan keuangan
Ini perhitungan kasar saja.
  • Dibawah 5jt Rupiah, 150mm-200mm Dobsonian untuk melihat bintang, 100mm Refraktor bisa untuk langit/alam.
  • Sampai 15jt Rupiah Schmidt-Cassegrain 200mm yang dilengkapi komputer, 250-300mm Dobsonian, atau Newtonian, Refraktor yang sudah dilengkapi komputer.
Harga menentukan pilihan, memang, sebuah ironi. Tapi untuk mendapatkan yang terbaik bukanlah berdasarkan harga atau keuangan, tapi pintar-pintar kita memilih dan merencanakan. Selamat berburu langit malam dengan teleskop.

Sumber: http://langitselatan.com/2007/07/22/panduan-singkat-memilih-dan-membeli-teleskop-by-nggieng/

Toko Online Jual Teleskop Celestron AstroMaster 70AZ Murah Garansi Resmi Celestron 2 Tahun

AstroMaster® 70AZ Telescope

Quick Overview

Features

General Features

  • Quick and easy no-tool setup
  • Permanently mounted StarPointer
  • Erect image optics - Ideal for terrestrial and astronomical use
  • Quick release dovetail attachment - no tool setup
  • Pan handle Alt-Az control with clutch - for smooth and accurate pointing
  • Rugged pre-assembled tripod with 1.25" steel tube legs - Provides a rigid and stable platform
  • All coated glass optics for clear, crisp images
  • Deluxe accessory tray for convenient storage of accessories
  • “The SkyX – First Light Edition” astronomy software with a 10,000 object database, printable sky maps and 75 enhanced images
If you’re looking for a dual-purpose telescope appropriate for both terrestrial and celestial viewing, then the AstroMaster Series is for you. Each AstroMaster model is capable of giving correct views of land and sky.

The AstroMaster Series produce bright, clear images of the Moon and planets. It is easy to see the moons of Jupiter and the rings of Saturn with every one of these fine instruments. For views of the brighter deep space objects like galaxies and nebulae, we recommend the larger aperture and light gathering ability of the Newtonian reflectors.

Optical Design Refractor
Aperture (mm) 70 mm (2.76 in)
Focal Length (mm) 900 mm (35 in)
Focal Ratio 13
Eyepiece 1 (mm) 20 mm (0.79 in)
Magnification 1 45 x
Eyepiece 2 (mm) 10 mm (0.39 in)
Magnification 2 90 x
Finderscope Built-on StarPointer
Star Diagonal Erect Image Diagonal - 1.25"
Mount Altazimuth
Tripod 1.25" steel tube legs
Weight (lbs) 18 lbs (8.16 kg)
Highest Useful Magnification 165 x
Lowest Useful Magnification 10 x
Limiting Stellar Magnitude 11.7
Resolution (Rayleigh) 1.99 arc seconds
Resolution (Dawes) 1.66 arc seconds
Light Gathering Power 100 x
Angular Field of View (deg) 1.1 °
Linear Field of View (@1000 yds) 58 ft (18 m)
Optical Coatings Fully Coated
Optical Tube Length 36 in (914 mm)
Tube Attachment Dovetail Bar

Harga: Rp 1.819.800

Toko Online Jual Teleskop Celestron AstroMaster 114EQ Murah Garansi Resmi Celestron 2 Tahun

AstroMaster® 114EQ Telescope


Quick Overview

Features

General Features

  • Quick and easy no-tool setup
  • Permanently mounted StarPointer
  • Erect image optics - Ideal for terrestrial and astronomical use
  • Quick release dovetail attachment - no tool setup
  • German Equatorial mount with Setting circles - to accurately locate and track sky objects
  • Rugged pre-assembled tripod with 1.25" steel tube legs - Provides a rigid and stable platform
  • All coated glass optics for clear, crisp images
  • Deluxe accessory tray for convenient storage of accessories
  • “The SkyX – First Light Edition” astronomy software with a 10,000 object database, printable sky maps and 75 enhanced images

Celestron AstroMaster 114 EQ Reflector TelescopeIf you're looking for a dual-purpose telescope appropriate for both terrestrial and celestial viewing, then the AstroMaster Series is for you. Each AstroMaster model is capable of giving correct views of land and sky.

The AstroMaster Series produce bright, clear images of the Moon and planets. It is easy to see the moons of Jupiter and the rings of Saturn with every one of these fine instruments. For views of the brighter deep space objects like galaxies and nebulae, we recommend the larger aperture and light gathering ability of the Newtonian reflectors.



Optical Design Newtonian Reflector
Aperture (mm) 114 mm (4.49 in)
Focal Length (mm) 1000 mm (39 in)
Focal Ratio 8.77
Eyepiece 1 (mm) 20 mm (0.79 in)
Magnification 1 50 x
Eyepiece 2 (mm) 10 mm (0.39 in)
Magnification 2 100 x
Finderscope Built-on StarPointer
Mount CG-2 Equatorial
Tripod 1.25" steel tube legs
Weight (lbs) 17 lbs (7.71 kg)
Highest Useful Magnification 269 x
Lowest Useful Magnification 16 x
Limiting Stellar Magnitude 12.8
Resolution (Rayleigh) 1.22 arc seconds
Resolution (Dawes) 1.02 arc seconds
Light Gathering Power 265 x
Angular Field of View (deg) 1 °
Linear Field of View (@1000 yds) 53 ft (16 m)
Optical Coatings Aluminum
Optical Tube Length 18 in (457 mm)
Tube Attachment Dovetail Bar

Harga: Rp 2.967.300

Toko Online Jual Teleskop Celestron AstroMaster 70EQ Murah Garansi Resmi Celestron 2 Tahun

AstroMaster® 70EQ Telescope

Quick Overview

Features

General Features

  • Quick and easy no-tool setup
  • Permanently mounted StarPointer
  • Erect image optics - Ideal for terrestrial and astronomical use
  • Quick release dovetail attachment - no tool setup
  • German Equatorial mount with Setting circles - to accurately locate and track sky objects
  • Rugged pre-assembled tripod with 1.25" steel tube legs - Provides a rigid and stable platform
  • All coated glass optics for clear, crisp images
  • Deluxe accessory tray for convenient storage of accessories
  • “The SkyX – First Light Edition” astronomy software with a 10,000 object database, printable sky maps and 75 enhanced images
If you're looking for a dual-purpose telescope appropriate for both terrestrial and celestial viewing, then the AstroMaster Series is for you. Each AstroMaster model is capable of giving correct views of land and sky.

The AstroMaster Series produce bright, clear images of the Moon and planets. It is easy to see the moons of Jupiter and the rings of Saturn with every one of these fine instruments. For views of the brighter deep space objects like galaxies and nebulae, we recommend the larger aperture and light gathering ability of the Newtonian reflectors.

Optical Design Refractor
Aperture (mm) 70 mm (2.76 in)
Focal Length (mm) 900 mm (35 in)
Focal Ratio 13
Eyepiece 1 (mm) 20 mm (0.79 in)
Magnification 1 45 x
Eyepiece 2 (mm) 10 mm (0.39 in)
Magnification 2 90 x
Finderscope Built-on StarPointer
Star Diagonal Erect Image Diagonal - 1.25"
Mount CG-2 Equatorial
Tripod 1.25" steel tube legs
Weight (lbs) 18 lbs (8.16 kg)
Highest Useful Magnification 165 x
Lowest Useful Magnification 10 x
Limiting Stellar Magnitude 11.7
Resolution (Rayleigh) 1.99 arc seconds
Resolution (Dawes) 1.66 arc seconds
Light Gathering Power 100 x
Angular Field of View (deg) 1.1 °
Linear Field of View (@1000 yds) 58 ft (18 m)
Optical Coatings Fully Coated
Optical Tube Length 36 in (914 mm)
Tube Attachment Dovetail Bar

Harga: Rp 2.022.300

Toko Online Jual Teleskop Celestron AstroMaster 76EQ Murah Garansi Resmi Celestron 2 Tahun

AstroMaster® 76EQ Telescope

Quick Overview

Features

General Features

  • Quick and easy no-tool setup
  • Permanently mounted StarPointer
  • Erect image optics - Ideal for terrestrial and astronomical use
  • Quick release dovetail attachment - no tool setup
  • German Equatorial mount with Setting circles - to accurately locate and track sky objects
  • Rugged pre-assembled tripod with 1.25" steel tube legs - Provides a rigid and stable platform
  • All coated glass optics for clear, crisp images
  • Deluxe accessory tray for convenient storage of accessories
  • “The SkyX – First Light Edition” astronomy software with a 10,000 object database, printable sky maps and 75 enhanced images
If you’re looking for a dual-purpose telescope appropriate for both terrestrial and celestial viewing, then the AstroMaster Series is for you. Each AstroMaster model is capable of giving correct views of land and sky.

The AstroMaster Series produce bright, clear images of the Moon and planets. It is easy to see the moons of Jupiter and the rings of Saturn with every one of these fine instruments. For views of the brighter deep space objects like galaxies and nebulae, we recommend the larger aperture and light gathering ability of the Newtonian reflectors.

Optical Design Newtonian Reflector
Aperture (mm) 76 mm (2.99 in)
Focal Length (mm) 700 mm (28 in)
Focal Ratio 9.21
Eyepiece 1 (mm) 20 mm (0.79 in)
Magnification 1 35 x
Eyepiece 2 (mm) 10 mm (0.39 in)
Magnification 2 70 x
Finderscope Built-on StarPointer
Mount CG-2 Equatorial
Tripod 1.25" steel tube legs
Weight (lbs) 18 lbs (8.16 kg)
Highest Useful Magnification 180 x
Lowest Useful Magnification 11 x
Limiting Stellar Magnitude 11.9
Resolution (Rayleigh) 1.83 arc seconds
Resolution (Dawes) 1.53 arc seconds
Light Gathering Power 118 x
Angular Field of View (deg) 1.4 °
Linear Field of View (@1000 yds) 75 ft (23 m)
Optical Coatings Aluminum
Optical Tube Length 26 in (660 mm)
Tube Attachment Dovetail Bar

Harga: Rp 2.292.300

Toko Online Jual Teleskop Celestron PowerSeeker 60EQ Murah Garansi Resmi Celestron 2 Tahun

Quick Overview

Features

General Features

  • Quick and easy no-tool setup
  • Slow motion controls for smooth tracking
  • Erect image optics - Ideal for terrestrial and astronomical use
  • Fully coated glass optical components with high transmission coatings for enhanced image brightness and clarity
  • 3x Barlow lens triples the magnifying power of each eyepiece
  • Accessory tray for convenient storage of accessories
  • “The SkyX – First Light Edition” astronomy software with a 10,000 object database, printable sky maps and 75 enhanced images
PowerSeeker telescopes are a great way to open up the wonders of the Universe to the aspiring astronomer!
The Celestron PowerSeeker series of telescopes is designed to give the first-time buyer the perfect combination of quality, value, features and power. Offering exceptional value, these telescopes feature portable yet powerful designs with ample optical performance to excite any newcomer to the world of amateur astronomy.

Optical Design Refractor
Aperture (mm) 60 mm (2.36 in)
Focal Length (mm) 900 mm (35 in)
Focal Ratio 15
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 5x24
Star Diagonal 1.25" Erect Image Diagonal
Mount Equatorial
Accessory Tray No-Tool Tray with Eyepiece holder
Tripod Aluminum
Weight (lbs) 10 lbs (4.54 kg)
Highest Useful Magnification 142 x
Lowest Useful Magnification 8.57 x
Limiting Stellar Magnitude 11.4
Resolution (Rayleigh) 2.32 arc seconds
Resolution (Dawes) 1.93 arc seconds
Photographic Resolution 133 line/mm
Light Gathering Power 73 x
Angular Field of View (deg) 1.1 °
Linear Field of View (@1000 yds) 58 ft (18 m)
Optical Coatings Fully-Coated
Optical Tube Length 36 in (914 mm)
Telescope Weight 10 lbs (4.54 kg)

Harga: Rp 1.617.300

Toko Online Jual Teleskop Celestron PowerSeeker 70AZ Murah Garansi Resmi Celestron 2 Tahun

PowerSeeker 70AZ Telescope

Quick Overview

Features

General Features

  • Quick and easy no-tool setup
  • Slow motion controls for smooth tracking
  • Erect image optics - Ideal for terrestrial and astronomical use
  • Fully coated glass optical components with high transmission coatings for enhanced image brightness and clarity
  • 3x Barlow lens triples the magnifying power of each eyepiece
  • Accessory tray for convenient storage of accessories
  • “The SkyX – First Light Edition” astronomy software with a 10,000 object database, printable sky maps and 75 enhanced images
Celestron PowerSeeker telescopes are a great way to open up the wonders of the Universe to the aspiring astronomer. The PowerSeeker series is designed to give the first-time telescope user the perfect combination of quality, value, features and power.
Amateur astronomy is a great family hobby that can be enjoyed year round, and Celestron’s PowerSeekers are the ideal choice for an affordable and high quality telescope that will provide many hours of enjoyment for the entire family.
PowerSeekers are quick and easy to set up – even for the novice. No tools are required for assembly!
Their sturdy equatorial mounts are perfect for tracking objects in the night sky, and the collapsible alt-azimuth mounts are perfectly suited for terrestrial (land) viewing as well as astronomical use.
All of Celestron’s PowerSeekers include a full range of eyepieces plus a 3x Barlow lens that provides an increase in viewing power hundreds of times greater than that of the unaided eye!
PowerSeekers are designed and manufactured using all fully coated glass optical components with high transmission coatings for enhanced image brightness and clarity.
Erect Image Optics are ideal for terretrial (land) and astronomical (sky) use.

Optical Design Refractor
Aperture (mm) 70 mm (2.76 in)
Focal Length (mm) 700 mm (28 in)
Focal Ratio 10
Eyepiece 1 (mm) 20 mm (0.79 in)
Magnification 1 35 x
Eyepiece 2 (mm) 4 mm (0.16 in)
Magnification 2 175 x
Barlow Lens 3 x
Finderscope 5x24
Star Diagonal 1.25" Erect Image Diagonal
Mount Altazimuth
Accessory Tray No-Tool Tray with Eyepiece holder
Tripod Aluminum
Weight (lbs) 8 lbs (3.63 kg)
Highest Useful Magnification 165 x
Lowest Useful Magnification 10 x
Limiting Stellar Magnitude 11.7
Resolution (Rayleigh) 1.99 arc seconds
Resolution (Dawes) 1.66 arc seconds
Light Gathering Power 100 x
Angular Field of View (deg) 1.4 °
Linear Field of View (@1000 yds) 74 ft (23 m)
Optical Coatings Fully-Coated
Optical Tube Length 30 in (762 mm)

Harga: Rp 1.212.300

Toko Online Jual Teleskop Celestron FirstScope Murah Garansi Resmi Celestron 2 Tahun

FirstScope Telescope

Quick Overview

Features

General Features

  • High quality Dobsonian style stand with a 76 mm reflector optical tube make FirstScope an ideal entry level astronomical telescope.
  • Portable and lighweight table-top design makes it easy to store, transport and setup your FirstScope Telescope
  • FirstScope is very easy to observe with, the user simply navigates the night sky by moving the tube in the direction of their desired object.
  • Stylish and decorative design makes FirstScope a wonderful keepsake for anyone interested in astronomy.
FirstScope pays tribute to the men and women who brought us one step closer to understanding the universe around us!
In 1609, world-renowned Italian scientist, Galileo Galilei, introduced an elementary telescope to the growing astronomy community which sparked interest into the mysterious night sky for centuries to come. Four centuries later, Celestron offers the portable FirstScope Telescope. The FirstScope pays tribute to Galileo Galilei and many of history’s most notable astronomers and scientists by displaying their names around the optical tube. We honor the contributions of these men and women, who brought us one step closer to understanding the universe around us.
The FirstScope is a wonderful keepsake for anyone interested in astronomy. This quality Dobsonian style telescope features a 76 mm aperture reflector optical tube. FirstScope is an ideal entry level astronomical telescope. It is very easy to observe with, the user simply navigates the night sky by moving the tube in the direction of their desired object, making the viewing experience a snap! The compact design makes it easy enough to take with you on your next outdoor adventure. FirstScope is also stylish enough to be a decorative fixture on your bookshelf or desk.

Optical Design Newtonian Reflector
Aperture (mm) 76 mm (2.99 in)
Focal Length (mm) 300 mm (12 in)
Focal Ratio 3.95
Eyepiece 1 (mm) 20 mm (0.79 in)
Magnification 1 15 x
Eyepiece 2 (mm) 4 mm (0.16 in)
Magnification 2 75 x
Weight (oz) 69 oz (1956 g)
Highest Useful Magnification 180 x
Lowest Useful Magnification 11 x
Limiting Stellar Magnitude 11.9
Resolution (Rayleigh) 1.83 arc seconds
Resolution (Dawes) 1.53 arc seconds
Light Gathering Power 118 x

Harga: Rp 808.650

Toko Online Jual Teleskop Celestron PowerSeeker 50AZ Murah Garansi Resmi Celestron 2 Tahun


Quick Overview

Features

General Features

  • Quick and easy no-tool setup
  • Slow motion controls for smooth tracking
  • Erect image optics - Ideal for terrestrial and astronomical use
  • Fully coated glass optical components with high transmission coatings for enhanced image brightness and clarity
  • 3x Barlow lens triples the magnifying power of each eyepiece
  • Accessory tray for convenient storage of accessories
  • “The SkyX – First Light Edition” astronomy software with a 10,000 object database, printable sky maps and 75 enhanced images
PowerSeeker telescopes are a great way to open up the wonders of the Universe to the aspiring astronomer!
The Celestron PowerSeeker series of telescopes is designed to give the first-time buyer the perfect combination of quality, value, features and power. Offering exceptional value, these telescopes feature portable yet powerful designs with ample optical performance to excite any newcomer to the world of amateur astronomy.

Optical Design Refractor
Aperture (mm) 50 mm (1.97 in)
Focal Length (mm) 600 mm (24 in)
Focal Ratio 12
Eyepiece 1 (mm) 20 mm (0.79 in)
Magnification 1 30 x
Eyepiece 2 (mm) 12 mm (0.47 in)
Magnification 2 50 x
Eyepiece 3 (mm) 4 mm (0.16 in)
Magnification 3 150 x
Barlow Lens 3 x
Finderscope 5x24
Star Diagonal 0.96"
Mount Altazimuth
Tripod Aluminum
Weight (lbs) 6 lbs (2.72 kg)
Highest Useful Magnification 118 x
Lowest Useful Magnification 7.14 x
Limiting Stellar Magnitude 11
Resolution (Rayleigh) 2.79 arc seconds
Resolution (Dawes) 2.32 arc seconds
Photographic Resolution 167 line/mm
Light Gathering Power 51 x
Angular Field of View (deg) 1.4 °
Linear Field of View (@1000 yds) 72 ft (22 m)
Optical Coatings Fully-Coated
Optical Tube Length 24 in (610 mm)

Harga: Rp 672.300

Toko Online Jual Teleskop PowerSeeker 70AZ Murah Garansi Resmi Celestron 2 Tahun

PowerSeeker 70AZ Telescope

Quick Overview

Features

General Features

  • Quick and easy no-tool setup
  • Slow motion controls for smooth tracking
  • Erect image optics - Ideal for terrestrial and astronomical use
  • Fully coated glass optical components with high transmission coatings for enhanced image brightness and clarity
  • 3x Barlow lens triples the magnifying power of each eyepiece
  • Accessory tray for convenient storage of accessories
  • “The SkyX – First Light Edition” astronomy software with a 10,000 object database, printable sky maps and 75 enhanced images
Celestron PowerSeeker telescopes are a great way to open up the wonders of the Universe to the aspiring astronomer. The PowerSeeker series is designed to give the first-time telescope user the perfect combination of quality, value, features and power.
Amateur astronomy is a great family hobby that can be enjoyed year round, and Celestron’s PowerSeekers are the ideal choice for an affordable and high quality telescope that will provide many hours of enjoyment for the entire family.
PowerSeekers are quick and easy to set up – even for the novice. No tools are required for assembly!
Their sturdy equatorial mounts are perfect for tracking objects in the night sky, and the collapsible alt-azimuth mounts are perfectly suited for terrestrial (land) viewing as well as astronomical use.
All of Celestron’s PowerSeekers include a full range of eyepieces plus a 3x Barlow lens that provides an increase in viewing power hundreds of times greater than that of the unaided eye!
PowerSeekers are designed and manufactured using all fully coated glass optical components with high transmission coatings for enhanced image brightness and clarity.
Erect Image Optics are ideal for terretrial (land) and astronomical (sky) use.

Optical Design Refractor
Aperture (mm) 70 mm (2.76 in)
Focal Length (mm) 700 mm (28 in)
Focal Ratio 10
Eyepiece 1 (mm) 20 mm (0.79 in)
Magnification 1 35 x
Eyepiece 2 (mm) 4 mm (0.16 in)
Magnification 2 175 x
Barlow Lens 3 x
Finderscope 5x24
Star Diagonal 1.25" Erect Image Diagonal
Mount Altazimuth
Accessory Tray No-Tool Tray with Eyepiece holder
Tripod Aluminum
Weight (lbs) 8 lbs (3.63 kg)
Highest Useful Magnification 165 x
Lowest Useful Magnification 10 x
Limiting Stellar Magnitude 11.7
Resolution (Rayleigh) 1.99 arc seconds
Resolution (Dawes) 1.66 arc seconds
Light Gathering Power 100 x
Angular Field of View (deg) 1.4 °
Linear Field of View (@1000 yds) 74 ft (23 m)
Optical Coatings Fully-Coated
Optical Tube Length 30 in (762 mm)

Harga: Rp 1.212.300