![[Refurbished] RedCat 51 MK2.5](http://williamoptics.com/cdn/shop/files/Redcat-51-IIU-pers-1.jpg?v=1731395719&width=2400)
![[Refurbished] RedCat 51 MK2.5](http://williamoptics.com/cdn/shop/files/Redcat-51-IIU-pers-3.jpg?v=1731395731&width=2400)
![[Refurbished] RedCat 51 MK2.5](http://williamoptics.com/cdn/shop/files/Redcat-51-IIU-pers-2.jpg?v=1731395724&width=2400)
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[Refurbished] RedCat 51 MK2.5
Overview
Condition: Like New
One-year warranty
Notice
- Lens Type
- 4 Elements Petzval Design
- Focal Length
- 250 mm
- Diameter
- 51 mm
- Focal Ratio
- f/4.9
- Image circle
- 43 mm
- Focuser
- Helical Focuser
- Adapter Included
- Tilt Adjuster Rotator M54 → M48 Adapter
- Optional Flattener
- No Flattener Required
- Camera Format
- Full Frame APS-C M4/3
- Tube Length
- 291 mm - 228 mm
- OTA Weight
- 1.3 kg / 2.87 lbs
- Total Weight
- 1.76 kg / 3.88 lbs
Choose options
![[Refurbished] RedCat 51 MK2.5](http://williamoptics.com/cdn/shop/files/Redcat-51-IIU-pers-1.jpg?v=1731395719&width=2400)
![[Refurbished] RedCat 51 MK2.5](http://williamoptics.com/cdn/shop/files/Redcat-51-IIU-pers-3.jpg?v=1731395731&width=2400)
![[Refurbished] RedCat 51 MK2.5](http://williamoptics.com/cdn/shop/files/Redcat-51-IIU-pers-2.jpg?v=1731395724&width=2400)
![[Refurbished] RedCat 51 MK2.5](http://williamoptics.com/cdn/shop/files/Redcat-51-IIU-side-1.jpg?v=1731395706&width=2400)
![[Refurbished] RedCat 51 MK2.5](http://williamoptics.com/cdn/shop/files/Redcat-51-IIU-side-2.jpg?v=1731395711&width=2400)
[Refurbished] RedCat 51 MK2.5
Sale price$598.00 USD
Regular price$865.00 USD