The William optics RedCat 51 is a portable, small telescope with the best possible optics and optical design, especially fast and usable for astrophotography at a low possible price. With this William optics RedCat 51 aperture, Petzval optical design and f / 4.9 focal ratio, it looks like William has accomplished his mission.
Optical design
As mentioned, the lens has a 51 mm opening with a focal length of 250 mm in a Petzval design, the glass is made of FPL-53 and FPL-51. The optical design consists of 4 elements processed in 3 groups. This makes the telescope suitable for full frame with a flat field.
Focusing
The Helical focuser ensures a very fine focus of the desired object. The focus tube is graduated, ideal for photographic purposes. The available field rotator ensures that you can accurately take mosaic pictures. This is also provided with a scale. See photo in the gallery.
The RedCat has a camera with M48 thread. Nowadays almost most cameras can be connected to this. Mounting on a mount or a photo tripod is a piece of cake. Vixen style dovetail is included in the scope of delivery of the telescope, this dovetail can also be used on connection of the ARCA-SWISS type. Ordinary photo tripods have also been considered, the William Optics RedCat can be easily connected to this.
REDCAT has been updated from October 2019, small improvements that make the REDCAT even better. In the photo below you can see what the improvements are. Unfortunately, this has led to a price increase for the REDCAT.
Specifications
Lens Diameter: 51mm
Focal length:250mm
Speed (f):4.9
Maximum meaningful magnification:127.5x
Minimum meaningful magnification:8.16
Maximum resolution: 2.27 (arcsec / pixel)
Limit Magnitude: 11.24
Focuser rotatable: Yes
Focuser fine adjustment: No 1 on 1
Color: Red
Type: Refractor
Type of optics: Apochromat triplet Petzval (4 lens design)
Tube material: Aluminum
Tube weight: 1.47kg
Tube length: 225mm
Tube diameter: 80mm
Supplied viewfinder: No
Supplied eyepieces: Does not apply
Supplied diagonal: No
Tripod / mount included: No
Warranty: William Optics, 2 Years
Whats in the box
William Optics 51mm Petzval APO Refractor Telescope, RedCat
Focuser with Focusing Index
Bahtinov Mask
CAT Series Mounting Ring and Plate
Tilt Adjuster
Soft Carrying Case
