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Telescopes > William Optics > Cat > William Optics Apochromatic refractor AP 71/350 RedCat 71 OTA
Product no.: 73030

Apochromatic refractor AP 71/350 RedCat 71 OTA

$ 2,290.00 incl. VAT, plus shipping costs
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Product description

More about the series Cat...

The AP 71/350 is an impressive combination of compact size, reasonable price and outstanding optical quality, which is suitable for astronomy and nature photography. At the heart of the optical set-up is the Petzval design comprising 4 elements in three groups, using FPL53 and FPL51 glass. The result is a colour-rich, corrected image field with a diameter of more than 45 millimetres - perfect for full-frame cameras! The fast focal ratio of f/4.9 allows short exposure times.

An M48 thread is provided for camera connections. Appropriate T2 adapters can be found under "recommended accessories". Focusing is helical - so by twisting the textured ring on the telescope body. This means that even heavy cameras do not present a problem.

The 21cm-long prism rail included offers three connection options: screw connection with a photo thread, using an Arca-Swiss plate, or attaching to a Vixen standard dovetail clamp. With these options, it should be no problem to connect this telescope to all the common photo tripods, photo mounts or astronomical mounts.

Not only is a protective nylon carrying case included, but also a specially-devised Bahtinov mask.. This mask helps with focusing and is built into the lens cap.

A telescope such as the RedCat 71 is ideal for photographers who are interested in both the night sky and also wildlife photography. You are not only investing in impressive optical performance with the RedCat 71, you will also be thrilled by the durable and beautiful finish William Optics has achieved.

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.

Our expert comment:

On its own, the tube weighs 2.8kg. The entire telescope, complete with the appropriate tube clamps, prism rail and the finder shoe/carrying handle, weighs 3.7kg.

The telescope's focal position - just like the smaller RedCat 51 - is designed for purely photographic use (astrograph).

(Jan Stroeher)

Specifications

Optics


Type
Refractor
Type of build
Apochromat
Aperture (mm)
71
Focal length (mm)
350
Aperture ratio (f/)
4,9
Resolving capacity
1,94
Limit value (mag)
12,3
Light gathering capacity
100
Max. useful magnification
142
Tube weight (kg)
2,8
Tube length (mm)
335
Tube material
Aluminium
Coating
multiple
Tube construction
Full tube
dew cap diameter (mm)
98
lens design
Quadruplet

Focuser


Tilting Adaptor
yes
Type of build
Helical
Connecting threaded socket (camera-side)
M48
Backfocus (mm)
59
Free aperture (mm)
45
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
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

Recommended accessories

Telescope accessories > Transport & storage (6)
Carry case

Omegon carry case for 5" tubes/lenses

$ 99.00*
Telescope accessories > Other (8)

William Optics Cat Series Saddle Handle Bar

$ 87.00*
Eyepieces (3)
Eyepiece

Omegon Ultra Wide Angle eyepiece 9mm 1,25"

$ 69.00*
Eyepieces > Other (2)
Reticle eyepieces

Omegon Reticle eyepieces Illuminated crosshair eyepiece, 12.5mm

$ 89.00*
Filters > Nebulae filters (5)
Filters

Omegon Filters Nebula/ city light filter 1.25 ''

$ 39.90*
Filters > Other (3)
Filters

Omegon Filters Moon filter 1.25"

$ 19.90*
Astrophotography > Camera adaptor (6)
Camera adaptor

William Optics Camera adaptor M48 compatible with Canon EOS

$ 65.00*
Astrophotography > Camera mounts (4)

Omegon Easypic Universal Smartphone Adapter

$ 99.00*
Astrophotography > Guiding (4)
Guidescope

William Optics Guidescope UniGuide 32mm Red

$ 185.00*
Astrophotography > Other (2)
Diffraction Spike Mask

noctutec easy-spike William Optics RedCat 71

$ 31.90*
Mounts & accessories (1)

William Optics Prism rail DSD 210

$ 65.00*
Observatories (1)

Omegon Tent observatory

$ 189.00*
Media (2)
Star chart

Omegon Star chart Planisphere

$ 14.90*
Outdoor (2)
Headlamp

Omegon LED headlamp

$ 13.90*
Globes & Maps (1)
Continental map

Oculum Verlag Sky Quality Map Europe

$ 18.90*
Solar Observation (2)

Baader Sun filter foil 20 x 29 cm

$ 31.90*
Maintenance & Cleaning > Lens cleaners (3)

Omegon 7-in-1 lens cleaning set

$ 19.90*
Maintenance & Cleaning > Other (2)

Omegon microfibre cleaning cloth 20cm x 20cm

$ 4.90*

*All prices include VAT plus shipping costs.

William Optics Apochromatic refractor AP 71/350 RedCat 71 OTA
William Optics Apochromatic refractor AP 71/350 RedCat 71 OTA
William Optics Apochromatic refractor AP 71/350 RedCat 71 OTA
William Optics Apochromatic refractor AP 71/350 RedCat 71 OTA
William Optics Apochromatic refractor AP 71/350 RedCat 71 OTA
William Optics Apochromatic refractor AP 71/350 RedCat 71 OTA
William Optics Apochromatic refractor AP 71/350 RedCat 71 OTA
William Optics Apochromatic refractor AP 71/350 RedCat 71 OTA
William Optics Apochromatic refractor AP 71/350 RedCat 71 OTA
William Optics Apochromatic refractor AP 71/350 RedCat 71 OTA
William Optics Apochromatic refractor AP 71/350 RedCat 71 OTA
William Optics Apochromatic refractor AP 71/350 RedCat 71 OTA
William Optics Apochromatic refractor AP 71/350 RedCat 71 OTA
William Optics Apochromatic refractor AP 71/350 RedCat 71 OTA

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