William Optics RedCat 91 WIFD f/4.9 Petzval Refractor Telescope - Red
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- 91mm five-element Petzval APO with Super ED, ED, and lanthanum glass for superb color and contrast
- Fast f/4.9 focal ratio captures more light in shorter exposures
- 55mm image circle covers full-frame and near medium-format sensors with no additional flattener
- Patented WIFD internal focusing system delivers rock-solid, tilt-free support for heavy imaging trains
- Lightweight 14 lb total package with soft travel case small enough for airline travel
- Integrated tilt adjuster, camera rotator, and Bahtinov mask included
- Please note this is for the full red refractor as shown above; black with red trim model is structurally the same and used for description purposes.
William Optics RedCat 91 Overview: Fast, Sharp, and Ready for Any Sensor
The William Optics RedCat 91 WIFD Petzval refractor is built for astrophotographers who refuse to compromise on image quality, speed, or convenience. Five precision optical elements work together to produce stunningly sharp star fields across a fully corrected 55mm image circle. At 448mm of focal length and f/4.9, this telescope gathers light quickly and frames a generous swath of sky. That combination of speed, correction, and coverage means the RedCat 91 handles everything from expansive hydrogen-alpha nebulae to dense galaxy clusters without supplemental corrective optics. Whether you shoot with a dedicated cooled camera, a full-frame DSLR, or even a medium-format sensor, this scope delivers clean illumination to every corner of your frame.
William Optics RedCat 91 WIFD Review and Testing:
This review of the RedCat 91 is courtesy of Trevor from AstroBackyard. He does a great job here of showing both its ease of use and its amazing results.
William Optics RedCat 91 Highlights
55mm Corrected Image Circle
The 55mm fully corrected image circle accommodates everything from APS-C and full-frame sensors to medium-format cameras, delivering edge-to-edge sharpness across all platforms. This versatility future-proofs your investment as your imaging ambitions grow.
Five-Element Petzval Design
The integrated Petzval optical design delivers a fully corrected focal plane without requiring supplemental flatteners or correctors between your camera and scope. Your imaging train stays simple, backfocus calculations are straightforward, and everything you need ships in the box.
Fast f/4.9 Focal Ratio
Speed matters when you are chasing faint targets. At f/4.9, the RedCat 91 collects photons significantly faster than typical f/6 or f/7 refractors of similar aperture. Shorter individual exposures mean less time fighting tracking errors and more time stacking high-quality data.
Premium Glass for Demanding Color Correction
Every glass element inside the RedCat 91 serves a specific purpose. Two Super ED elements handle the heavy lifting of chromatic correction, virtually eliminating violet fringing and longitudinal color shift. A dedicated ED element and a lanthanum element refine contrast and residual spherical aberration even further. The fifth element completes the Petzval geometry, flattening the focal plane so that stars remain pinpoint from the center of the field to the extreme corners. Manufacturer spot diagrams confirm tight, symmetrical star profiles across the entire corrected field. For astrophotographers who pixel-peep their corners, this level of correction is a genuine game changer.
Patented WIFD Internal Focusing:
Traditional rack-and-pinion focusers support the full weight of your imaging train on an extending drawtube. That design can introduce flexure and tilt, especially with heavy filter wheels and large cameras. The WIFD system flips that approach entirely by mounting your imaging equipment directly to the body of the scope. Instead of moving the camera, the WIFD shifts only a lightweight optical group inside the scope during focusing. This design eliminates sag under heavy loads, maintains a constant balance point as you reach focus, and prevents vignetting caused by a retracting drawtube. You also never need to rack your focuser in at the end of an imaging session, which makes traveling with this scope much easier. The system provides 36mm of internal travel, and the smooth, backlash-free motion works seamlessly with third-party electronic autofocus units right out of the box like the ZWO EAF.
Built-In Tilt Adjuster and Camera Rotator
Tilt is a common frustration in astrophotography. Even small amounts can throw one corner of your image out of focus while the opposite corner looks perfect. The RedCat 91 addresses this with an integrated tilt adjustment mechanism. Three push-pull screws, accessible with the included hex key set, let you dial in precise correction for your specific imaging train. A built-in camera angle rotator also lets you frame targets exactly the way you want without loosening or repositioning your entire setup. These features save valuable time in the field and help you achieve consistently flat, well-composed frames.
All the accessories you need!
The RedCat 91 ships as a complete, ready-to-use imaging system with everything you need to start capturing deep-sky images. Both M48 and M54 camera adapters are included with clearly defined backfocus distances of 60.8mm and 65.8mm respectively, and the M48 adapter features an integrated 2-inch filter cell so narrowband and light-pollution filters thread directly into your imaging train without external drawers or spacing hardware. Red anodized CNC tube rings with oversized clamp knobs secure the telescope to the included 290mm hybrid dovetail bar, while a combination Synta-style accessory rail and carry handle provides mounting points for guide scopes and doubles as a comfortable grip during setup. Riser blocks give clearance for electronic autofocus units beneath the tube, and a removable Bahtinov mask is built right into the dust cap for quick focus checks. William Optics even includes the hex key set you need to get everything connected!
Lightweight and Travel-Ready
At just 6.3 kg (approximately 14 lbs) with rings and dovetail attached, the RedCat 91 is one of the most portable 91mm refractors available. The compact 556mm tube length fits easily in a backpack or overhead carry-on compartment, and a padded soft case is included to protect the telescope during transport. The complete package makes setup and teardown quick and repeatable whether you are imaging from your backyard or traveling to a remote dark-sky site. Pair the RedCat 91 with a mid-range equatorial mount and you have a complete, go-anywhere deep-sky imaging rig.
Specifications
- Model Color: Red
- Optical Design: Five-element advanced Petzval with two Super ED, one ED, one lanthanum, and one additional glass element
- Aperture: 91 mm (3.58")
- Focal Length: 448 mm (17.64")
- Focal Ratio: f/4.9
- Corrected Image Circle: 55 mm (2.17")
- Focuser: WIFD internal rack-and-pinion; compatible with electronic automatic focusers
- Focuser Travel: 36 mm (1.42")
- Maximum Backfocus: 60.8 mm (2.39") with M48 adapter; 65.8 mm (2.59") with M54 adapter
- Rear Adapters: Tilt adjuster, camera rotator, M63-to-M48 adapter, and M54 adapter
- Dew Shield Outer Diameter: 120 mm (4.72")
- Optical Tube Diameter: 116.5 mm (4.59")
- Total Tube Length: 556 mm (21.89")
- Bottom Dovetail Plate: 290 mm (11.42") Vixen-style
- Top Mounting Bar: Saddle-style carrying handle
- OTA Weight: 4.72 kg (10.41 lb)
- Total Weight: 6.30 kg (13.89 lb), including tube rings and dovetail plate
- Country of Manufacture: Taiwan
Diagram Reports
Parts and Dimensions
Frequently Asked Questions
Do I need a separate field flattener or corrector for the RedCat 91?
No. The five-element Petzval optical system includes full field correction. Stars remain sharp and round across the entire 55mm image circle without any additional corrective optics.
What mount do I need for the William Optics RedCat 91?
The complete setup weighs roughly 14 lbs before adding a camera and accessories. A quality equatorial mount rated for at least 20 lbs of imaging payload will work well. Popular options include the iOptron CEM26, ZWO AM3, and Sky-Watcher HEQ5 Pro. Always account for the total weight of your camera, guide scope, and cables when choosing a mount.
Can I use an electronic autofocuser with the WIFD system?
Yes. The WIFD focuser is compatible with popular electronic autofocus units such as the ZWO EAF without any additional adapters or modifications. Riser blocks are included to provide clearance for the motor housing beneath the tube.
Will the RedCat 91 work with my APS-C or Micro Four Thirds camera?
Absolutely. The 55mm corrected image circle is far larger than what smaller sensors require. The included M48 adapter connects to the vast majority of astronomy cameras and T-ring setups.
What deep-sky targets pair well with the RedCat 91?
The 448mm focal length and wide field of view make this telescope ideal for large emission nebulae, sprawling molecular clouds, and nearby galaxy groups. Targets like the Veil Nebula complex, the Heart and Soul Nebulae, the Andromeda Galaxy, and the Rho Ophiuchi cloud region are all excellent choices.
How do I adjust tilt on the RedCat 91?
Remove the camera angle tension knob, then unthread the angle guide ring to expose the tilt adjustment ring. Use the included hex keys to fine-tune the three push-pull adjustment screws until your sensor plane is perfectly square to the optical axis. Reinstall the guide ring and tension knob to lock everything in place.
Other Information
- Country of Manufacture: Taiwan
William Optics RedCat 91 Overview: Fast, Sharp, and Ready for Any Sensor
The William Optics RedCat 91 WIFD Petzval refractor is built for astrophotographers who refuse to compromise on image quality, speed, or convenience. Five precision optical elements work together to produce stunningly sharp star fields across a fully corrected 55mm image circle. At 448mm of focal length and f/4.9, this telescope gathers light quickly and frames a generous swath of sky. That combination of speed, correction, and coverage means the RedCat 91 handles everything from expansive hydrogen-alpha nebulae to dense galaxy clusters without supplemental corrective optics. Whether you shoot with a dedicated cooled camera, a full-frame DSLR, or even a medium-format sensor, this scope delivers clean illumination to every corner of your frame.
William Optics RedCat 91 WIFD Review and Testing:
This review of the RedCat 91 is courtesy of Trevor from AstroBackyard. He does a great job here of showing both its ease of use and its amazing results.
William Optics RedCat 91 Highlights
55mm Corrected Image Circle
The 55mm fully corrected image circle accommodates everything from APS-C and full-frame sensors to medium-format cameras, delivering edge-to-edge sharpness across all platforms. This versatility future-proofs your investment as your imaging ambitions grow.
Five-Element Petzval Design
The integrated Petzval optical design delivers a fully corrected focal plane without requiring supplemental flatteners or correctors between your camera and scope. Your imaging train stays simple, backfocus calculations are straightforward, and everything you need ships in the box.
Fast f/4.9 Focal Ratio
Speed matters when you are chasing faint targets. At f/4.9, the RedCat 91 collects photons significantly faster than typical f/6 or f/7 refractors of similar aperture. Shorter individual exposures mean less time fighting tracking errors and more time stacking high-quality data.
Premium Glass for Demanding Color Correction
Every glass element inside the RedCat 91 serves a specific purpose. Two Super ED elements handle the heavy lifting of chromatic correction, virtually eliminating violet fringing and longitudinal color shift. A dedicated ED element and a lanthanum element refine contrast and residual spherical aberration even further. The fifth element completes the Petzval geometry, flattening the focal plane so that stars remain pinpoint from the center of the field to the extreme corners. Manufacturer spot diagrams confirm tight, symmetrical star profiles across the entire corrected field. For astrophotographers who pixel-peep their corners, this level of correction is a genuine game changer.
Patented WIFD Internal Focusing:
Traditional rack-and-pinion focusers support the full weight of your imaging train on an extending drawtube. That design can introduce flexure and tilt, especially with heavy filter wheels and large cameras. The WIFD system flips that approach entirely by mounting your imaging equipment directly to the body of the scope. Instead of moving the camera, the WIFD shifts only a lightweight optical group inside the scope during focusing. This design eliminates sag under heavy loads, maintains a constant balance point as you reach focus, and prevents vignetting caused by a retracting drawtube. You also never need to rack your focuser in at the end of an imaging session, which makes traveling with this scope much easier. The system provides 36mm of internal travel, and the smooth, backlash-free motion works seamlessly with third-party electronic autofocus units right out of the box like the ZWO EAF.
Built-In Tilt Adjuster and Camera Rotator
Tilt is a common frustration in astrophotography. Even small amounts can throw one corner of your image out of focus while the opposite corner looks perfect. The RedCat 91 addresses this with an integrated tilt adjustment mechanism. Three push-pull screws, accessible with the included hex key set, let you dial in precise correction for your specific imaging train. A built-in camera angle rotator also lets you frame targets exactly the way you want without loosening or repositioning your entire setup. These features save valuable time in the field and help you achieve consistently flat, well-composed frames.
All the accessories you need!
The RedCat 91 ships as a complete, ready-to-use imaging system with everything you need to start capturing deep-sky images. Both M48 and M54 camera adapters are included with clearly defined backfocus distances of 60.8mm and 65.8mm respectively, and the M48 adapter features an integrated 2-inch filter cell so narrowband and light-pollution filters thread directly into your imaging train without external drawers or spacing hardware. Red anodized CNC tube rings with oversized clamp knobs secure the telescope to the included 290mm hybrid dovetail bar, while a combination Synta-style accessory rail and carry handle provides mounting points for guide scopes and doubles as a comfortable grip during setup. Riser blocks give clearance for electronic autofocus units beneath the tube, and a removable Bahtinov mask is built right into the dust cap for quick focus checks. William Optics even includes the hex key set you need to get everything connected!
Lightweight and Travel-Ready
At just 6.3 kg (approximately 14 lbs) with rings and dovetail attached, the RedCat 91 is one of the most portable 91mm refractors available. The compact 556mm tube length fits easily in a backpack or overhead carry-on compartment, and a padded soft case is included to protect the telescope during transport. The complete package makes setup and teardown quick and repeatable whether you are imaging from your backyard or traveling to a remote dark-sky site. Pair the RedCat 91 with a mid-range equatorial mount and you have a complete, go-anywhere deep-sky imaging rig.
Specifications
- Model Color: Red
- Optical Design: Five-element advanced Petzval with two Super ED, one ED, one lanthanum, and one additional glass element
- Aperture: 91 mm (3.58")
- Focal Length: 448 mm (17.64")
- Focal Ratio: f/4.9
- Corrected Image Circle: 55 mm (2.17")
- Focuser: WIFD internal rack-and-pinion; compatible with electronic automatic focusers
- Focuser Travel: 36 mm (1.42")
- Maximum Backfocus: 60.8 mm (2.39") with M48 adapter; 65.8 mm (2.59") with M54 adapter
- Rear Adapters: Tilt adjuster, camera rotator, M63-to-M48 adapter, and M54 adapter
- Dew Shield Outer Diameter: 120 mm (4.72")
- Optical Tube Diameter: 116.5 mm (4.59")
- Total Tube Length: 556 mm (21.89")
- Bottom Dovetail Plate: 290 mm (11.42") Vixen-style
- Top Mounting Bar: Saddle-style carrying handle
- OTA Weight: 4.72 kg (10.41 lb)
- Total Weight: 6.30 kg (13.89 lb), including tube rings and dovetail plate
- Country of Manufacture: Taiwan
Diagram Reports
Parts and Dimensions
Frequently Asked Questions
Do I need a separate field flattener or corrector for the RedCat 91?
No. The five-element Petzval optical system includes full field correction. Stars remain sharp and round across the entire 55mm image circle without any additional corrective optics.
What mount do I need for the William Optics RedCat 91?
The complete setup weighs roughly 14 lbs before adding a camera and accessories. A quality equatorial mount rated for at least 20 lbs of imaging payload will work well. Popular options include the iOptron CEM26, ZWO AM3, and Sky-Watcher HEQ5 Pro. Always account for the total weight of your camera, guide scope, and cables when choosing a mount.
Can I use an electronic autofocuser with the WIFD system?
Yes. The WIFD focuser is compatible with popular electronic autofocus units such as the ZWO EAF without any additional adapters or modifications. Riser blocks are included to provide clearance for the motor housing beneath the tube.
Will the RedCat 91 work with my APS-C or Micro Four Thirds camera?
Absolutely. The 55mm corrected image circle is far larger than what smaller sensors require. The included M48 adapter connects to the vast majority of astronomy cameras and T-ring setups.
What deep-sky targets pair well with the RedCat 91?
The 448mm focal length and wide field of view make this telescope ideal for large emission nebulae, sprawling molecular clouds, and nearby galaxy groups. Targets like the Veil Nebula complex, the Heart and Soul Nebulae, the Andromeda Galaxy, and the Rho Ophiuchi cloud region are all excellent choices.
How do I adjust tilt on the RedCat 91?
Remove the camera angle tension knob, then unthread the angle guide ring to expose the tilt adjustment ring. Use the included hex keys to fine-tune the three push-pull adjustment screws until your sensor plane is perfectly square to the optical axis. Reinstall the guide ring and tension knob to lock everything in place.
- Optical Tube Assembly
- Dust cover with bahtinov mask
- Saddle handlebar
- Tube rings
- Camera angle rotator
- Tilt adapter
- 290mm Vixen-style dovetail plate
- M63 to M48 / M54 adapter for camera
- Carrying case
- 91mm five-element Petzval APO with Super ED, ED, and lanthanum glass for superb color and contrast
- Fast f/4.9 focal ratio captures more light in shorter exposures
- 55mm image circle covers full-frame and near medium-format sensors with no additional flattener
- Patented WIFD internal focusing system delivers rock-solid, tilt-free support for heavy imaging trains
- Lightweight 14 lb total package with soft travel case small enough for airline travel
- Integrated tilt adjuster, camera rotator, and Bahtinov mask included
- Please note this is for the full red refractor as shown above; black with red trim model is structurally the same and used for description purposes.
William Optics RedCat 91 Overview: Fast, Sharp, and Ready for Any Sensor
The William Optics RedCat 91 WIFD Petzval refractor is built for astrophotographers who refuse to compromise on image quality, speed, or convenience. Five precision optical elements work together to produce stunningly sharp star fields across a fully corrected 55mm image circle. At 448mm of focal length and f/4.9, this telescope gathers light quickly and frames a generous swath of sky. That combination of speed, correction, and coverage means the RedCat 91 handles everything from expansive hydrogen-alpha nebulae to dense galaxy clusters without supplemental corrective optics. Whether you shoot with a dedicated cooled camera, a full-frame DSLR, or even a medium-format sensor, this scope delivers clean illumination to every corner of your frame.
William Optics RedCat 91 WIFD Review and Testing:
This review of the RedCat 91 is courtesy of Trevor from AstroBackyard. He does a great job here of showing both its ease of use and its amazing results.
William Optics RedCat 91 Highlights
55mm Corrected Image Circle
The 55mm fully corrected image circle accommodates everything from APS-C and full-frame sensors to medium-format cameras, delivering edge-to-edge sharpness across all platforms. This versatility future-proofs your investment as your imaging ambitions grow.
Five-Element Petzval Design
The integrated Petzval optical design delivers a fully corrected focal plane without requiring supplemental flatteners or correctors between your camera and scope. Your imaging train stays simple, backfocus calculations are straightforward, and everything you need ships in the box.
Fast f/4.9 Focal Ratio
Speed matters when you are chasing faint targets. At f/4.9, the RedCat 91 collects photons significantly faster than typical f/6 or f/7 refractors of similar aperture. Shorter individual exposures mean less time fighting tracking errors and more time stacking high-quality data.
Premium Glass for Demanding Color Correction
Every glass element inside the RedCat 91 serves a specific purpose. Two Super ED elements handle the heavy lifting of chromatic correction, virtually eliminating violet fringing and longitudinal color shift. A dedicated ED element and a lanthanum element refine contrast and residual spherical aberration even further. The fifth element completes the Petzval geometry, flattening the focal plane so that stars remain pinpoint from the center of the field to the extreme corners. Manufacturer spot diagrams confirm tight, symmetrical star profiles across the entire corrected field. For astrophotographers who pixel-peep their corners, this level of correction is a genuine game changer.
Patented WIFD Internal Focusing:
Traditional rack-and-pinion focusers support the full weight of your imaging train on an extending drawtube. That design can introduce flexure and tilt, especially with heavy filter wheels and large cameras. The WIFD system flips that approach entirely by mounting your imaging equipment directly to the body of the scope. Instead of moving the camera, the WIFD shifts only a lightweight optical group inside the scope during focusing. This design eliminates sag under heavy loads, maintains a constant balance point as you reach focus, and prevents vignetting caused by a retracting drawtube. You also never need to rack your focuser in at the end of an imaging session, which makes traveling with this scope much easier. The system provides 36mm of internal travel, and the smooth, backlash-free motion works seamlessly with third-party electronic autofocus units right out of the box like the ZWO EAF.
Built-In Tilt Adjuster and Camera Rotator
Tilt is a common frustration in astrophotography. Even small amounts can throw one corner of your image out of focus while the opposite corner looks perfect. The RedCat 91 addresses this with an integrated tilt adjustment mechanism. Three push-pull screws, accessible with the included hex key set, let you dial in precise correction for your specific imaging train. A built-in camera angle rotator also lets you frame targets exactly the way you want without loosening or repositioning your entire setup. These features save valuable time in the field and help you achieve consistently flat, well-composed frames.
All the accessories you need!
The RedCat 91 ships as a complete, ready-to-use imaging system with everything you need to start capturing deep-sky images. Both M48 and M54 camera adapters are included with clearly defined backfocus distances of 60.8mm and 65.8mm respectively, and the M48 adapter features an integrated 2-inch filter cell so narrowband and light-pollution filters thread directly into your imaging train without external drawers or spacing hardware. Red anodized CNC tube rings with oversized clamp knobs secure the telescope to the included 290mm hybrid dovetail bar, while a combination Synta-style accessory rail and carry handle provides mounting points for guide scopes and doubles as a comfortable grip during setup. Riser blocks give clearance for electronic autofocus units beneath the tube, and a removable Bahtinov mask is built right into the dust cap for quick focus checks. William Optics even includes the hex key set you need to get everything connected!
Lightweight and Travel-Ready
At just 6.3 kg (approximately 14 lbs) with rings and dovetail attached, the RedCat 91 is one of the most portable 91mm refractors available. The compact 556mm tube length fits easily in a backpack or overhead carry-on compartment, and a padded soft case is included to protect the telescope during transport. The complete package makes setup and teardown quick and repeatable whether you are imaging from your backyard or traveling to a remote dark-sky site. Pair the RedCat 91 with a mid-range equatorial mount and you have a complete, go-anywhere deep-sky imaging rig.
Specifications
- Model Color: Red
- Optical Design: Five-element advanced Petzval with two Super ED, one ED, one lanthanum, and one additional glass element
- Aperture: 91 mm (3.58")
- Focal Length: 448 mm (17.64")
- Focal Ratio: f/4.9
- Corrected Image Circle: 55 mm (2.17")
- Focuser: WIFD internal rack-and-pinion; compatible with electronic automatic focusers
- Focuser Travel: 36 mm (1.42")
- Maximum Backfocus: 60.8 mm (2.39") with M48 adapter; 65.8 mm (2.59") with M54 adapter
- Rear Adapters: Tilt adjuster, camera rotator, M63-to-M48 adapter, and M54 adapter
- Dew Shield Outer Diameter: 120 mm (4.72")
- Optical Tube Diameter: 116.5 mm (4.59")
- Total Tube Length: 556 mm (21.89")
- Bottom Dovetail Plate: 290 mm (11.42") Vixen-style
- Top Mounting Bar: Saddle-style carrying handle
- OTA Weight: 4.72 kg (10.41 lb)
- Total Weight: 6.30 kg (13.89 lb), including tube rings and dovetail plate
- Country of Manufacture: Taiwan
Diagram Reports
Parts and Dimensions
Frequently Asked Questions
Do I need a separate field flattener or corrector for the RedCat 91?
No. The five-element Petzval optical system includes full field correction. Stars remain sharp and round across the entire 55mm image circle without any additional corrective optics.
What mount do I need for the William Optics RedCat 91?
The complete setup weighs roughly 14 lbs before adding a camera and accessories. A quality equatorial mount rated for at least 20 lbs of imaging payload will work well. Popular options include the iOptron CEM26, ZWO AM3, and Sky-Watcher HEQ5 Pro. Always account for the total weight of your camera, guide scope, and cables when choosing a mount.
Can I use an electronic autofocuser with the WIFD system?
Yes. The WIFD focuser is compatible with popular electronic autofocus units such as the ZWO EAF without any additional adapters or modifications. Riser blocks are included to provide clearance for the motor housing beneath the tube.
Will the RedCat 91 work with my APS-C or Micro Four Thirds camera?
Absolutely. The 55mm corrected image circle is far larger than what smaller sensors require. The included M48 adapter connects to the vast majority of astronomy cameras and T-ring setups.
What deep-sky targets pair well with the RedCat 91?
The 448mm focal length and wide field of view make this telescope ideal for large emission nebulae, sprawling molecular clouds, and nearby galaxy groups. Targets like the Veil Nebula complex, the Heart and Soul Nebulae, the Andromeda Galaxy, and the Rho Ophiuchi cloud region are all excellent choices.
How do I adjust tilt on the RedCat 91?
Remove the camera angle tension knob, then unthread the angle guide ring to expose the tilt adjustment ring. Use the included hex keys to fine-tune the three push-pull adjustment screws until your sensor plane is perfectly square to the optical axis. Reinstall the guide ring and tension knob to lock everything in place.
Other Information
- Country of Manufacture: Taiwan
| Telescope Focal Length | 401 - 500mm |
|---|
- Optical Tube Assembly
- Dust cover with bahtinov mask
- Saddle handlebar
- Tube rings
- Camera angle rotator
- Tilt adapter
- 290mm Vixen-style dovetail plate
- M63 to M48 / M54 adapter for camera
- Carrying case
William Optics RedCat 91 WIFD f/4.9 Petzval Refractor Telescope - Red