William Optics RedCat 51 II-U APO 250mm f/4.9
AED 4,150.00
Please note that, unlike previous versions of the Redcat telescope, this latest II-U version CANNOT be used visually.
- Aperture 51 mm / focal length 250 mm / focal ratio f/4.9
- Ultra-compact 51mm Petzval apochromatic refractor with razor sharp optics and a full frame flat field
- Ideal for wide-field astronomical or terrestrial imaging with APS-C or full-frame DSLR, mirrorless, or dedicated astronomy cameras
- Precision helical focuser, field rotator, and Bahtinov mask for fast and precise set-up
- Includes slot for 48mm astronomy filters and M48 threads to accommodate a wide range of cameras
- Petzval design with chromatic aberration free FPL53 objective (4 elements in 3 groups)
- Very well corrected image field of 44 mm diameter – even suitable for full-frame cameras
- Camera connection via male M48 thread (suitable adapters are available) – working distance 55 mm
- 360° rotation of the camera for the right display window
- Camera Sensor Tilt Fine Adjuster
- Focusing via precise helical focuser
- Thread for mounted 2″ filters (M48x0.75 thread, female) when used as camera lens
- Flexible dovetail bar at the base (long version), suitable for Vixen style saddle plates, Arca-Swiss style saddle plates, and with female 1/4″ photo thread
- Nylon carry case and Bahtinov mask for astrophotography are included in the scope of delivery
- Tube length only 225 mm / weight only 1.5 kg – perfect for on the way
Available on backorder
Description
This latest v2-U version of the popular RedCat 51 has an improved helical focuser and updated tension adjustment.
Please download the following PDF to see the differences between the Redcat 51II and Redcat 51II-U
The William Optics RedCat 51 APO is a 51mm f/4.9 Petzval refractor with synthetic fluoride (FPL53 and FPL51) glass elements for a full-frame, flat field image.
Provides high-resolution images when used for astrophotography or wildlife photography.
It’s fast f/4.9 focal ratio, and compact size make it ideal for convenient wide-field astrophotography or piggybacking.
It incorporates a smooth helical focuser, a field rotator graduated by degree, a slot for 48mm filters and a reversible dovetail for either Vixen style* or Arca-Swiss mounting.
Sky and Telescope Review of Redcat 51
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