| ₹ 217910.0 includes GST and import duties. | |
| B2B customers can avail ₹ 33231.28 ITC on this product | |
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Description
William Optics CAT 61 WIFD Overview
Designed for astrophotography, the Cat 61 WIFD 61mm f/4.9 Apochromatic Refractor Telescope from Williams Optics uses an unorthodox design for supporting heavy cameras. It delivers a wide field and a fast focal ratio with a Petzval lens for beautiful images. The WIFD (William Optic Internal Focus Design) places the 10:1 rack-and-pinion focuser in the center of the optical tube, eliminating the tilt and vignetting that can occur from heavy cameras on traditional rear-mounted focusers. A four-element Petzval-style lens yields a sharp image with no need for a flattener, and the dust cover has a built-in Bahtinov mask for tack-sharp star images. This optical tube assembly requires a mount and a tripod for use.
- Fast f/4.9 focal ratio and 300mm focal length for wide field of view and fast exposure times
- Apochromatic Petzval-style four-element lens for rich views with minimal chromatic aberration
- Sharp image with no need for a separate field flattener
- 46mm image circle for full-frame, APS-C, and micro four thirds cameras
- Dust cover with integrated Bahtinov mask for fine focusing on stars
- Built-in tilt adapter
- Camera angle rotation device
- M54 female thread for cameras, accessories, or eyepiece diagonals
- William Optics Internal Focus Design places focuser in center of OTA to balance the weight of imaging systems
- Precise internal sliding of fixed optics prevents image shift, ensuring stable and clear observations
- 10:1 coarse and fine focus rack-and-pinion design
- Compatible with ZWO EAF automatic focuser
- 0-42mm focus travel, ruler to 50mm
- Dial-style thermometer for gauging temperature effect on optical tube
- Anodized aluminum optical tube
- Sturdy mounting rings and handle assembly with 210mm Vixen-style dovetail
- Additional dovetail with thumbscrews on handle for guidescope
Items Included
- William Optics Cat 61 WIFD 61mm f/4.9 Apochromatic Refractor Telescope (Red, OTA Only)
- Dust Cover with Bahtinov Mask
- Dew Shield
- Mounting Ring with Handle
- M48/M54 Adapter
- 8.3" Vixen-Style Dovetail
- Camera Angle Rotator
- Allen Key Set
- Soft Carry Case
- Limited 2-Year Manufacturer Warranty
Not Included
- Essential AC Adapters
Additional Resources
William Optics CAT 61 WIFD Specs
| Optical Design |
Apochromatic Doublet Refractor
|
| Aperture |
61 mm / 2.4"
|
| Focal Length |
300 mm
|
| Focal Ratio |
f/4.9
|
| Focuser |
Dual-Speed Rack-and-Pinion
|
| Weight |
7.47 lb / 3.39 kg
|
| Optical Design |
Apochromatic Doublet Refractor
|
| Aperture |
61 mm / 2.4"
|
| Focal Length |
300 mm
|
| Focal Ratio |
f/4.9
|
| Focuser |
Dual-Speed Rack-and-Pinion
|
| Diagonal |
No
|
| Finderscope |
No
|
| Mounting |
Vixen Style
|
| Optical Tube Dimensions |
14.4" / 365 mm
|
| Payload Capacity |
No
|
| Altitude Adjustment |
No
|
| Latitude Adjustment |
No
|
| Counterweight |
No
|
| Weight |
7.47 lb / 3.39 kg
|
| Package Weight |
11.32 lb
|
| Box Dimensions (LxWxH) |
18.7 x 10.8 x 9.8"
|
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Bulk Discount
| Quantity | Price |
| 2 | ₹ 213551.8 |
| 3-5 | ₹ 211372.7 |
| 5-10 | ₹ 207014.5 |
| 10+ | ₹ 202656.3 |
Bulk discount will be automatically applied during checkout based on quantity.