Regrettably for Sale is my William Optics Redcat 51 Petzval APO. (V.1)
In fantastic condition, the optics are clean and it comes with a few extra's that make life that little bit easier when shooting astrophotography.
- Blackcat mount
- Redcat saddle bar
Asking $950 + Postage or pick up Vic
Optical design Apochromatic petzval (4 elements in 3 groups)
Objective diameter 51 mm
Focal length 250 mm
Focal ratio f/4.9
Image circle 44 mm
Material Anodized aluminium alloy
Mount attachment 210 mm Dual Vixen-style / Arca-Swiss dovetail bar
Focuser Indexed manual helical focuser
Camera connection M56 x 0.75, M48 x 0.75, optional T-Mounts
Backfocus 59.7 mm from M48 thread
Tube weight 1.8 kg
Tube length 225 mm (fully retracted), 305 mm (fully extended)
Tube diameter 80 mm
