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Telescopes > William Optics > Cat > William Optics Apochromatic refractor AP 51/250 Black&White Cat 51 OTA
Product no.: 77438

Apochromatic refractor AP 51/250 Black&White Cat 51 OTA

$ 1,130.00 incl. VAT plus shipping costs
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Product description

More about the series Cat...

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)
51
Focal length (mm)
250
Aperture ratio (f/)
4,9
Resolving capacity
2,71
Limit value (mag)
10,3
Light gathering capacity
50
Max. useful magnification
102
Tube weight (kg)
1,5
Carrying length (mm)
225
Tube material
Aluminium
Coating
multiple
dew cap diameter (mm)
80
lens design
Quadruplet

Focuser

Tilting Adaptor
yes
Type of build
Helical
Connecting threaded socket (camera-side)
M48
Backfocus (mm)
59,7
Free aperture (mm)
44
Adjustment range (mm)
33
Rotating
yes

Mount

Type of build
OTA
Mounting type
no mount

Included accessories

Dew Shield
yes
Carry case
yes
Miscellaneous
Bahtinov focus mask
Prism rail
Arca-Swiss & Vixen-Style
Corrector
integrated

General

Series
Cat
Colour
white

Area of application

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

Recommended for

Beginners
no
Advanced
yes
Observatories
no
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Product safety

Manufacturer: William Optics Co. Ltd, TW, [email protected]
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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William Optics Apochromatic refractor AP 51/250 Black&White Cat 51 OTA
William Optics Apochromatic refractor AP 51/250 Black&White Cat 51 OTA
William Optics Apochromatic refractor AP 51/250 Black&White Cat 51 OTA
William Optics Apochromatic refractor AP 51/250 Black&White Cat 51 OTA
William Optics Apochromatic refractor AP 51/250 Black&White Cat 51 OTA
William Optics Apochromatic refractor AP 51/250 Black&White Cat 51 OTA
William Optics Apochromatic refractor AP 51/250 Black&White Cat 51 OTA
William Optics Apochromatic refractor AP 51/250 Black&White Cat 51 OTA
William Optics Apochromatic refractor AP 51/250 Black&White Cat 51 OTA

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