About this product
Model: wo_redcat_71
Part Number: T-C-71RD
The RedCat 51's bigger brother!
Includes Bahtinov Focusing Mask.
The William Optics RedCat 71 is a 71mm f/4.9 refractor with a Petzval design that comprises a doublet front group with FPL-53 glass element, plus a single central element and a single rear lens.
Designed primarily for astrophotography, the RedCat 71 provides a flat image plane (without need of an additional flattener), an image circle over 45mm, excellent colour correction and pinpoint stars.
Other features include a calibrated helical focuser with 2GT gear ring that is more precise than those found on most on typical camera lenses. The ring can also be locked, making it easy to find and maintain focus.
(2GT standard gear ring, 153 teeth, Diameter 98mm, width 8mm).
What's in the box
- M48 Dust Cap/Thread
- Tilt Adapter
- Camera Angle Rotator
- Rotator Tension Knob
- Saddle Handlebar (with two M4 thumb screws)
- Helical Focuser with 2GT Gear Ring
- Arca Swiss/Vixen Plate
- Mounting Rings
- Dew Shield with Focus Tension Ring
- Super Bright Bahtinov Mask
- Soft Carry Bag
Specifications
| Aperture | 71mm |
| Focal Ratio | F/4.9 |
| Focal Length | 348 mm |
| Objective Type | Petzval (4 elements in 3 groups) and Ohara FPL 53 ED element. |
| Image Circle | Φ 45mm (Full Frame) |
| Focuser | Helical |
| Dimensions |
| Tube Weight | 3.7kg |
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