Question

Assignment: Telescope Comparison

Students will research three different telescope companies online and then complete the following for each telescope selected. Research one relatively inexpensive telescope (less than $750), one more expensive telescope (more than $1,000), and a third telescope of your choosing. The third telescope of your choosing cannot be a repeat of previous two studied. Please refer to Module 5, Telescopes & Observing, for details on telescope design.

Websites researched
Company #1: website address
Company #2: website address
Company #3: website address

Telescope #1 – Less than $750
Company
Website visited
Telescope Model selected (name and catalog/item number)
Size of the telescope (usually given as the diameter in inches or millimeters)
Type of Telescope Optical design: Refractor (lens) Reflector (mirror-telescope) Compound (mirror and corrector lens)
Describe the Telescope from the Manufacturer’s description
Price
What does the telescope include? Eyepieces? Finder telescope? Mount? Other accessories?
Would you buy this telescope? Why or why not?
Other Comments

Telescope #2 – More than $1,000
Company
Website visited
Telescope Model selected (name and catalog/item number)
Size of the telescope (usually given as the diameter in inches or millimeters)
Type of Telescope Optical design: Refractor (lens) Reflector (mirror-telescope) Compound (mirror and corrector lens)
Describe the Telescope from the Manufacturer’s description
Price:
What does the telescope include? Eyepieces? Finder telescope? Mount? Other accessories?
Would you buy this telescope? Why or why not?
Other Comments

Telescope #3 – Telescope of your choosing (must be different than ones above)
Company
Website visited
Why did you choose this telescope?
Telescope Model selected (name and catalog/item number)
Size of the telescope (usually given as the diameter in inches or millimeters)
Type of Telescope Optical design: Refractor (lens) Reflector (mirror-telescope) Compound (mirror and corrector lens)
Describe the Telescope from the Manufacturer’s description
Price
What does the telescope include? Eyepieces? Finder telescope? Mount? Other accessories?
Other Comments

Answer 1

Websites researched
Company #1: website address	https://en.wikipedia.org/wiki/Telescope
Company #2: website address	https://interestingengineering.com/telescope
Company #3: website address	https://www.nasa.gov/audience/forstudents/9-12/features/telescope_feature_912.html

Telescope #1 – Less than $750
Company	HAMLEYS
Website visited	https://www.ajio.com
Telescope-Model selected (name and catalog/item number)	Telescope with Tripod Stand/4906190930
Size of the telescope (usually given as the diameter in inches or millimeters)	Height: 2.9 inches (7.5 cm) Width: 7.08 inches (18 cm) Length: 18.07 inches (45.9 cm)
Type of Telescope Optical design: Refractor (lens) Reflector (mirror-telescope) Compound (mirror and corrector lens)	Refractor with diagonal glass.
Describe the Telescope from the Manufacturer’s description	Whether it's gazing at the moon and identifying craters or watching stars fly across the night sky, this telescope set is perfect for any budding astronomer. Parents could also explain the concepts of astronomy which could help the child better understand what he is seeing or gazing at nights. Hamleys gives eco-friendly and reliable instrument for all the curious child.
Price	40$
What does the telescope include? Eyepieces? Finder telescope? Mount? Other accessories?	1 Telescope, 1 lens, 3 eyepieces, 1 diagonal mirror, and 1 Tripod Stand
Would you buy this telescope? Why or why not?	No, I will not buy this because it has low-resolution power and range.
Other Comments

Telescope #2 – More than $1,000
Company	Sky-Watcher ProED 120mm Doublet APO Refractor Telescope
Website visited	https://www.amazon.com
Telescope-Model selected (name and catalog/item number)	120mm Doublet APO Refractor Telescope/B004Q76Z5M
Size of the telescope (usually given as the diameter in inches or millimeters)	44 x 20 x 14 inches
Type of Telescope Optical design: Refractor (lens) Reflector (mirror-telescope) Compound (mirror and corrector lens)	Refractor
Describe the Telescope from the Manufacturer’s description	Sky-Watcher high-performance ED-APO refractors offer premium optical performance for the discriminating amateur astronomer. Refractors are coveted for their superb contrast, high-definition and coal-black sky background that make stars appear like diamonds embedded in black velvet. SW APO refractors utilize the most modern optical glasses and fabricating techniques to deliver the ultimate in high-fidelity astronomical imaging. Subtle details pop as never seen before in telescopes of lesser optical capability.
Price:	$1,649.00
What does the telescope include? Eyepieces? Finder telescope? Mount? Other accessories?	120 mm APO Refractor with ED Schott glass, 900 mm focal length (f/7.5), Dual-speed 2" Crayford-type focuser with 1.25" adaptor 20 mm and 5 mm 1.25, 8x50 RA viewfinder, 2" dielectric diagonal Tube-ring attachment hardware, Aluminum carry case
Would you buy this telescope? Why or why not?	Yes, It's powerful and gives good range and view of the glaxies.
Other Comments

Telescope #3 – Telescope of your choosing (must be different than ones above)
Company	Celestron
Website visited	https://www.amazon.com
Why did you choose this telescope?	Because it satisfies a need and also suits my budget. The accessories provided by company is more compare to others. It's the best in class viewing quality also size is small. Also has best telescope aperture per dollar. *Above answer totally depends on the requirement and budget of the user.
Telescope-Model selected (name and catalog/item number)	Advanced VX 6" Newtonian/B00AZCHF6U
Size of the telescope (usually given as the diameter in inches or millimeters)	32 x 16 x 14 inches
Type of Telescope Optical design: Refractor (lens) Reflector (mirror-telescope) Compound (mirror and corrector lens)	Reflector
Describe the Telescope from the Manufacturer’s description	Quick Overview Integer gear ratios and permanently programmable Periodic Error Correction eliminates recurring track errors from the worm gear. New motors offer improved tracking performance & provide more power to overcome load imbalances Updated industrial design offers more rigidity, less flexure and improved aesthetics New design allows viewing or imaging across the meridian without interference from the motors housings Improved latitude range. Can be used between 7 – 77 degrees latitude. Improved electronics with increased memory for future expansion NexStar+ hand control offers multiple language programming (English, French, Italian, German, Spanish)
Price	$1079
What does the telescope include? Eyepieces? Finder telescope? Mount? Other accessories?	6” (150mm) f/5 optical design gives excellent wide field views Parabolic primary mirror minimizes spherical aberration to produce a better image Integer gear ratios and permanently programmable Periodic Error Correction eliminates recurring track errors from the worm gear New motors offer improved tracking performance & provide more power to overcome load imbalances The updated industrial design offers more rigidity, less flexure, and improved aesthetics
Other Comments