Tumbler Base, Model A (A-R2) | 900-A All-Sky 2° Linear Field of View

2° Linear Field of View (@1000 yds) / @1000 m): 168 ft (56 m) Exit Pupil: 4mm (

54 kg) Dovetail: CG-5 Dovetail bar MOUNT INFO: Mount Type: Computerized Altitude-Azimuth Single Fork Arm Instrument load capacity: 25 lbs (11 kg) Height adjustment range (includes mount and tripod): 1193

Additional optical designs are possible to meet various photographic requirements enhancing the line to include a number of apertures and fast focal ratios

and the ability to capture both the faintest details and the brightest highlights within a single frame

Tumbler Base, Model A (A-R2) | 900-A All-Sky 2° Linear Field of ViewTumbler Base for Model A (A R2). This is the metal base for your tumbler. There are two pairs of slots to hold drive and idler shafts. This is the base only, and does not include any other parts