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Astronomy > Telescopes > Askar > Askar Apochromatic refractor AP 71/490 Flat-Field 71F OTA
Product no.: 83301

Apochromatic refractor AP 71/490 Flat-Field 71F OTA

$ 1,100.00 incl. VAT plus shipping costs
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  • Apochromat with integrated flattener
  • Optimised for astrophotography
  • Lightweight and portable
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advice for Astronomy

Product description

The Askar 71F ('Flat Field') is a compact quadruplet astrograph with an aperture of 71 mm, a focal length of 490 mm and a native aperture ratio of f/6.9. The instrument features a quadruple apochromatic lens with air gap, including an ED element that effectively reduces chromatic aberration. The Askar 71F supports 44 mm full-frame imaging with excellent reproduction of stars at the edge of the field. An integrated flattener allows you to dispense with additional correctors.

A comprehensive scope of delivery consisting of a viewfinder shoe, carrying handle, photo adaptors, 2 eyepieces, a Vixen/GP prism rail with photo tripod connection and a test certificate round off the product.

It not only matters which telescope you buy but also where you buy it. Our additional services:

  • We are a leading telescope dealer and know the devices we sell. Our customer service team will gladly help you after your purchase if you have problems with assembly or operation.
  • We provide a copy of the 80-page Telescope ABC beginners handbook with every telescope.

Specifications

Optics

Type
Refractor
Type of build
Apochromat
Aperture (mm)
71
Focal length (mm)
490
Aperture ratio (f/)
6,9
Resolving capacity
1,94
Limit value (mag)
12,3
Light gathering capacity
100
Max. useful magnification
142
lens design
Quadruplet
Tube weight (kg)
3,0
dew cap diameter (mm)
93
Fully Corrected Field (mm)
44

Focuser

Type of build
rack and pinion
Connection ( to eyepiece)
2
Motorized
no
Ring clamp
yes
Gear reduction
1:10 fine focusing
Adjustment range (mm)
111
Tilting Adaptor
no
Rotating
yes

Mount

Type of build
OTA
Mounting type
no mount

Included accessories

Dew Shield
yes
Deviating optics
Amici prism, 1.25", 45°
Corrector
integrated
Prism rail
Vixen-Style
Carrying handle
yes
Extension tubes
yes
Transport cases
no
Carry case
no
finder base
Vixen/Skywatcher Level
Eyepiece adaptor
1,25" & 2"
Tube clamps
yes
Test protocol
yes (certificate)
1.25'' eyepieces
8 mm & 20 mm

General

Variant name
Flat-Field

Area of application

Astrophotography
yes (very good)
Moon & Planets
yes
Nature Observation
no
Nebulae & galaxies
yes
Sun
no (Only with appropriate Sun filter)

Recommended for

Beginners
no
Advanced
yes
Observatories
no
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Product safety

Manufacturer: SHARPSTAR OPTICS CO.,LTD, 3/F, No.5 building , Science and Technology Center, No.79 Jin-Sui Road,, 314001 Zhe-Jiang, CN, http://www.sharpstar-optics.com
Responsible person: NIMAX GmbH, Otto-Lilienthal-Str. 9, 86899 Landsberg am Lech, DE, [email protected]
Product safety

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*All prices include VAT plus shipping costs.

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Askar Apochromatic refractor AP 71/490 Flat-Field 71F OTA
Askar Apochromatic refractor AP 71/490 Flat-Field 71F OTA
Askar Apochromatic refractor AP 71/490 Flat-Field 71F OTA
Askar Apochromatic refractor AP 71/490 Flat-Field 71F OTA
Askar Apochromatic refractor AP 71/490 Flat-Field 71F OTA
Askar Apochromatic refractor AP 71/490 Flat-Field 71F OTA
Askar Apochromatic refractor AP 71/490 Flat-Field 71F OTA
Askar Apochromatic refractor AP 71/490 Flat-Field 71F OTA
Askar Apochromatic refractor AP 71/490 Flat-Field 71F OTA
Askar Apochromatic refractor AP 71/490 Flat-Field 71F OTA
Askar Apochromatic refractor AP 71/490 Flat-Field 71F OTA
Askar Apochromatic refractor AP 71/490 Flat-Field 71F OTA

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