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Astronomy > Telescopes > William Optics > Cat > William Optics Apochromatic refractor AP 51/178 MiniCat WIFD OTA
Product no.: 84908

Apochromatic refractor AP 51/178 MiniCat WIFD OTA

$ 1,360.00 incl. VAT plus shipping costs
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Express shipment possible for delivery tomorrow, 11.06.2025!

Product description

More about the series Cat...

The new, ultra-compact MiniCat Astrograph from Wiillam Optics is a high-quality photographic instrument consisting of 6 lenses in 2 groups with integrated focuser (WIFD). The aperture ratio of f/3.5 allows very short exposure times with maximum image quality and correction. The illuminated image field corresponds to that of full-frame cameras.

The very short tube length and low weight of only 1.67 kg make the MiniCat a perfect apochromat for travelling and for small camera mounts, such as the iOptron SkyGuider. An M48 thread is provided for connecting the camera. Suitable T2 adaptors can be found under "Recommended accessories". The scope of delivery includes not only a protective nylon carrying bag, but also a specially calculated Bahtinov mask. This mask helps with focusing and is permanently integrated into the lens attachment.

Optics such as this MiniCat 51 are ideal for photographers who are dedicated to the night sky, but also to wildlife photography. With the MiniCat 51, you not only get impressive optical performance, but you can also enjoy the beautiful design and finish of William Optics!

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)
178
Aperture ratio (f/)
3,5
Resolving capacity
2,71
Limit value (mag)
12,3
Light gathering capacity
50
Max. useful magnification
102
Tube weight (kg)
1,67
Tube length (mm)
274
Tube material
Aluminium
Coating
multiple
Tube construction
Full tube
dew cap diameter (mm)
80
lens design
Quintuplet
Glass material
OHARA FPL-53
Fully Corrected Field (mm)
43,2

Focuser


Tilting Adaptor
no
Type of build
Internal
Connecting threaded socket (camera-side)
M48
Backfocus (mm)
59
Free aperture (mm)
48
Rotating
yes

Mount


Type of build
OTA
Mounting type
Azimuthal

Included accessories


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

General


Series
Cat
Colour
red

Area of application


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

Recommended for


Beginners
no
Advanced
yes
Observatories
no

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]

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*All prices include VAT plus shipping costs.

William Optics Apochromatic refractor AP 51/178 MiniCat WIFD OTA
William Optics Apochromatic refractor AP 51/178 MiniCat WIFD OTA
William Optics Apochromatic refractor AP 51/178 MiniCat WIFD OTA
William Optics Apochromatic refractor AP 51/178 MiniCat WIFD OTA
William Optics Apochromatic refractor AP 51/178 MiniCat WIFD OTA

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