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William Optics RedCat 71 WIFD

William Optics

William Optics RedCat 71 WIFD is a 71 mm Petzval APO refractor for wide-field nebulae, large targets, and travel-friendly imaging.

telescope $$$
William Optics RedCat 71 WIFD

Best Current Offer

Mile High Astronomy logo
Mile High Astronomy
In stock
$39.95

Other retailers

Specifications

Optics

Optical design
Petzval APO refractor
Aperture
71 mm
Focal length
350 mm
Focal ratio
f/4.9
Dawes limit
1.63"
Glass / elements
4-element Petzval

Imaging

Image circle
45 mm
Camera format
Full frame / APS-C / Micro 4/3
Full-frame coverage
Yes
Back focus
No flattener required
Corrected field
Flat full-frame field

Specifications

Weight
7.1 lb (3.22 kg)

Mechanical

Focuser
WIFD rack-and-pinion internal focuser
Dovetail
Vixen / Arca-Swiss dual plate

Astrophotography Fit

Best for wide-field nebulae, large targets, and travel-friendly imaging when the mount, camera format, and correction hardware are chosen as one system.

William Optics RedCat 71 WIFD sits in the telescope slot for wide-field nebulae, large targets, and travel-friendly imaging. The useful headline specs are aperture 71 mm, focal length 350 mm, f/4.9.

Camera coverage: Full frame / APS-C / Micro 4/3. Image circle: 45 mm. Back focus: No flattener required.

Fast astrographs collect signal quickly, but they are unforgiving: collimation, tilt, filter behavior, and back-focus spacing show up immediately in star shapes.

Best paired with

  • Rigid focuser, tilt adjuster, and exact corrector spacing
  • Cooled cameras with a sensor inside the corrected image circle
  • High-throughput filters that behave well at fast focal ratios

Not recommended for

  • Users who do not want to tune collimation, tilt, and spacing
  • Thick or narrow filters that show strong bandpass shift at fast focal ratios
  • Loose camera adapters or focusers that cannot hold the imaging train square

Where To Buy

Some links on this page are affiliate links. Prices and availability are pulled automatically from each retailer and updated daily.

Retailer Price Availability View Offer
Mile High Astronomy logo
Mile High Astronomy
Mile High Astronomy
$39.95
In stock
Updated 9/19/2026
View Offer - $39.95
Cloud Break Optics logo
Cloud Break Optics
Cloud Break Optics
$1,698.00
In stock
Updated 9/20/2026
View Offer - $1,698.00

Price History

Chronological retailer pricing with out-of-stock points shown at reduced opacity.

Cloud Break Optics Mile High Astronomy
$1,899.97 $1,266.65 $633.32 $0.00 Jul 31, 2026 Aug 25, 2026 Sep 20, 2026 Cloud Break Optics - $1,698.00 - Jul 31, 2026 - In stock Cloud Break Optics - $1,698.00 - Aug 1, 2026 - In stock Cloud Break Optics - $1,698.00 - Aug 2, 2026 - In stock Cloud Break Optics - $1,698.00 - Aug 3, 2026 - In stock Cloud Break Optics - $1,698.00 - Aug 4, 2026 - In stock Cloud Break Optics - $1,698.00 - Aug 5, 2026 - In stock Cloud Break Optics - $1,698.00 - Aug 6, 2026 - In stock Cloud Break Optics - $1,698.00 - Aug 7, 2026 - In stock Cloud Break Optics - $1,698.00 - Aug 8, 2026 - In stock Cloud Break Optics - $1,698.00 - Aug 9, 2026 - In stock Cloud Break Optics - $1,698.00 - Aug 10, 2026 - In stock Cloud Break Optics - $1,698.00 - Aug 11, 2026 - In stock Cloud Break Optics - $1,698.00 - Aug 12, 2026 - In stock Cloud Break Optics - $1,698.00 - Aug 13, 2026 - In stock Cloud Break Optics - $1,698.00 - Aug 14, 2026 - In stock Cloud Break Optics - $1,698.00 - Aug 15, 2026 - In stock Cloud Break Optics - $1,698.00 - Aug 16, 2026 - In stock Cloud Break Optics - $1,698.00 - Aug 17, 2026 - In stock Cloud Break Optics - $1,698.00 - Aug 18, 2026 - In stock Cloud Break Optics - $1,698.00 - Aug 19, 2026 - In stock Cloud Break Optics - $1,698.00 - Aug 20, 2026 - In stock Cloud Break Optics - $1,698.00 - Aug 21, 2026 - In stock Cloud Break Optics - $1,698.00 - Aug 22, 2026 - In stock Cloud Break Optics - $1,698.00 - Aug 23, 2026 - In stock Cloud Break Optics - $1,698.00 - Aug 24, 2026 - In stock Cloud Break Optics - $1,698.00 - Aug 25, 2026 - In stock Cloud Break Optics - $1,698.00 - Aug 26, 2026 - In stock Cloud Break Optics - $1,698.00 - Aug 27, 2026 - In stock Cloud Break Optics - $1,698.00 - Aug 28, 2026 - In stock Cloud Break Optics - $1,698.00 - Aug 29, 2026 - In stock Cloud Break Optics - $1,698.00 - Aug 31, 2026 - In stock Cloud Break Optics - $1,698.00 - Sep 1, 2026 - In stock Cloud Break Optics - $1,698.00 - Sep 2, 2026 - In stock Cloud Break Optics - $1,698.00 - Sep 3, 2026 - In stock Cloud Break Optics - $1,698.00 - Sep 4, 2026 - In stock Cloud Break Optics - $1,698.00 - Sep 5, 2026 - In stock Cloud Break Optics - $1,698.00 - Sep 6, 2026 - In stock Cloud Break Optics - $1,698.00 - Sep 7, 2026 - In stock Cloud Break Optics - $1,698.00 - Sep 8, 2026 - In stock Cloud Break Optics - $1,698.00 - Sep 9, 2026 - In stock Cloud Break Optics - $1,698.00 - Sep 10, 2026 - In stock Cloud Break Optics - $1,698.00 - Sep 11, 2026 - In stock Cloud Break Optics - $1,698.00 - Sep 12, 2026 - In stock Cloud Break Optics - $1,698.00 - Sep 13, 2026 - In stock Cloud Break Optics - $1,698.00 - Sep 14, 2026 - In stock Cloud Break Optics - $1,698.00 - Sep 15, 2026 - In stock Cloud Break Optics - $1,698.00 - Sep 16, 2026 - In stock Cloud Break Optics - $1,698.00 - Sep 17, 2026 - In stock Cloud Break Optics - $1,698.00 - Sep 18, 2026 - In stock Cloud Break Optics - $1,698.00 - Sep 19, 2026 - In stock Cloud Break Optics - $1,698.00 - Sep 20, 2026 - In stock Mile High Astronomy - $14.95 - Jul 31, 2026 - In stock Mile High Astronomy - $14.95 - Aug 1, 2026 - In stock Mile High Astronomy - $14.95 - Aug 2, 2026 - In stock Mile High Astronomy - $14.95 - Aug 3, 2026 - In stock Mile High Astronomy - $14.95 - Aug 4, 2026 - In stock Mile High Astronomy - $14.95 - Aug 5, 2026 - In stock Mile High Astronomy - $14.95 - Aug 6, 2026 - In stock Mile High Astronomy - $14.95 - Aug 7, 2026 - In stock Mile High Astronomy - $14.95 - Aug 9, 2026 - In stock Mile High Astronomy - $14.95 - Aug 10, 2026 - In stock Mile High Astronomy - $14.95 - Aug 11, 2026 - In stock Mile High Astronomy - $39.95 - Aug 12, 2026 - In stock Mile High Astronomy - $39.95 - Aug 13, 2026 - In stock Mile High Astronomy - $39.95 - Aug 14, 2026 - In stock Mile High Astronomy - $39.95 - Aug 15, 2026 - In stock Mile High Astronomy - $39.95 - Aug 16, 2026 - In stock Mile High Astronomy - $39.95 - Aug 17, 2026 - In stock Mile High Astronomy - $39.95 - Aug 18, 2026 - In stock Mile High Astronomy - $39.95 - Aug 19, 2026 - In stock Mile High Astronomy - $39.95 - Aug 20, 2026 - In stock Mile High Astronomy - $39.95 - Aug 21, 2026 - In stock Mile High Astronomy - $39.95 - Aug 22, 2026 - In stock Mile High Astronomy - $39.95 - Aug 23, 2026 - In stock Mile High Astronomy - $39.95 - Aug 24, 2026 - In stock Mile High Astronomy - $39.95 - Aug 25, 2026 - In stock Mile High Astronomy - $39.95 - Aug 26, 2026 - In stock Mile High Astronomy - $39.95 - Aug 27, 2026 - In stock Mile High Astronomy - $39.95 - Aug 28, 2026 - In stock Mile High Astronomy - $39.95 - Aug 29, 2026 - In stock Mile High Astronomy - $39.95 - Aug 30, 2026 - In stock Mile High Astronomy - $39.95 - Aug 31, 2026 - In stock Mile High Astronomy - $39.95 - Sep 1, 2026 - In stock Mile High Astronomy - $39.95 - Sep 3, 2026 - In stock Mile High Astronomy - $39.95 - Sep 4, 2026 - In stock Mile High Astronomy - $39.95 - Sep 5, 2026 - In stock Mile High Astronomy - $39.95 - Sep 6, 2026 - In stock Mile High Astronomy - $39.95 - Sep 7, 2026 - In stock Mile High Astronomy - $39.95 - Sep 8, 2026 - In stock Mile High Astronomy - $39.95 - Sep 9, 2026 - In stock Mile High Astronomy - $39.95 - Sep 10, 2026 - In stock Mile High Astronomy - $39.95 - Sep 11, 2026 - In stock Mile High Astronomy - $39.95 - Sep 12, 2026 - In stock Mile High Astronomy - $39.95 - Sep 13, 2026 - In stock Mile High Astronomy - $39.95 - Sep 14, 2026 - In stock Mile High Astronomy - $39.95 - Sep 15, 2026 - In stock Mile High Astronomy - $39.95 - Sep 16, 2026 - In stock Mile High Astronomy - $39.95 - Sep 17, 2026 - In stock Mile High Astronomy - $39.95 - Sep 18, 2026 - In stock Mile High Astronomy - $39.95 - Sep 19, 2026 - In stock