Brand: William Optics

William Optics Cat61 RedCat 61 WIFD f/4.9 Petzval APO Refractor Telescope (L-RC61)

T-C-61RD

Brand: William Optics

William Optics Cat61 RedCat 61 WIFD f/4.9 Petzval APO Refractor Telescope (L-RC61)

T-C-61RD

The wildly popular William Optics RedCat has earned it's place as a legendary astrograph and the new 61mm variant builds on that. William Optics has added their innovative Internal Focus Design WIFD to improve compatibility with a wide variety EAF's.
  • Optical Design - 61 mm lens, in a sleek Petzval design, using Synthetic Fluoride (FPL53 and FPL51) glass for a full-frame flat field image. The optical quality provides exceptional performance at a fast focal ratio of f/4.9.
  • Field Rotator - Inspired by luxury watches, the telescope's field rotator is laser etched with a degree indicator. To ensure that you will have the most precise framing possible in a small portable system, the camera can be rotated to fit within a degree of accuracy.
  • Filter Adapter - It is now easier to connect your filter to the Filter Adapter.
  • Filter Index - The filter index marks let you know the estimated focusing site when you twist the focuser.
  • Camera Sensor Tilt Adjuster - The Tilt Adjuster can adjust the tilt of the image plane.
  • Modular Mounting Ring - The single-tube Cat ring is sturdy enough to hold the optical tube and a large-sized DSLR without noticeable flexure. It is modular in the sense that you can add a finder scope or guide camera.
  • All New Mounting Plate - William Optics has reinvented the V-style dovetail. Not only will it fit into a Vixen style saddle plate, but if it's flipped over it can be attached to any Arca-Swiss style photography tripod head. This allows you to use the telescope for both day and night photography. The length of the new mounting plate is 210 mm.
  • Reversible Dew Shield - To maximize portability, the dew shield on this telescope is reversible. When stored backwards it can shorten the telescope length by approximately 83 mm.
  • Bahtinov Cap - The cap with this telescope not only protects the glass from the elements, but it also has one of the most useful tools when it comes to focusing. The Bahtinov Cap creates three lines that pass through a bright star. There is a main large line and a smaller cross-section of two lines making an “X”. The goal is to get the large line centered between the X and centered on the star. Once that is done, you have a perfect focus in as little as 2 to 3 seconds.
$1,476.00 USD

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$1,476.00 USD

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Why we love the William Optics Cat61 RedCat 61 WIFD f/4.9 Petzval APO Refractor Telescope (L-RC61)

The wildly popular William Optics RedCat has earned it's place as a legendary astrograph and the new 61mm variant builds on that. William Optics has added their innovative Internal Focus Design (WIFD) to improve compatibility with a wide variety of electronic auto focusers.

Petzval's are the original fast, wide lenses. They were mathematically designed optics that were way ahead of their time when first developed in the 1840's (that's not a typo) and they are still relevant today. They're known for being flat to the edges, so you won't get any bloated or stretched stars in the corners of your images. They're also super-wide, so you can use a massive camera sensor and take in vast swaths of the night sky.

The RedCat is an advanced astrograph that takes advantage of premium modern glass, and cutting-edge camera technologies to take your astrophotography to the next level.

Product Description

RedCat 61 Hero Image

Designed to be the best small, light and fast apochromatic refactor for widefield astrophotography. The unique optical design includes the highest quality glass for the best possible color correction and a huge, flat image circle. The result is a 61 mm objective lens, in a sleek Petzval design, for a full-frame image. Perfect if you want to capture the Horsehead and Flame Nebulae in the same frame. 

What can I see with a William Optics Cat61 RedCat 61 WIFD f/4.9 Petzval APO Refractor Telescope (L-RC61)?

Here are some simulated views of common objects. Results with your telescope will vary with viewing conditions, obrits, equipment and more.

Jupiter with

25mm Eyepiece - 12x Magnification

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Jupiter with

10mm Eyepiece - 30x Magnification

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Jupiter with

5mm Eyepiece - 60x Magnification

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Moon with 25mm Eyepiece

12x Magnification

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Moon with 10mm Eyepiece

30x Magnification

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Moon with 5mm Eyepiece

60x Magnification

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Andromeda with 36mm Eyepiece

8x Magnification

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Andromeda with 25mm Eyepiece

12x Magnification

(Sold Separately)

Andromeda with 10mm Eyepiece

30x Magnification

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What's in the Box

  • Cat61 61mm f/4.9 FPL53 APO Refractor Telescope OTA
  • M48 Camera Mount
  • Bahtinov Mask Cover
  • Soft Carry Case

Specifications

Focal Length: 300mm
Diameter: 61mm
Aperture: f/4.9
Camera Format: APC-C
Full Frame
Focuser: WIFD William Optics Internal Focus Design | Compatible with EAF
Image Circle: 46mm Full Frame
Tube Length: 365mm
Tube Weight: 5.43lbs / 2.465kg
Interchangeable T-Mount: Canon EF, RF
Nikon F, Z
Sony E
Pentax K
Micro Four Thirds
Fuji X

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