HomeStore

Askar FRA600 (f/5.6 108mm Quintuplet Astrograph)

Askar FRA600 (f/5.6 108mm Quintuplet Astrograph)

Askar FRA600/5.6. Following the excellent optical performance of its first FRA400/5.6,the FRA600/5.6 is an evolution of the FRA series, an upgraded lens has a 108mm aperture and a 600mm focal length,the f/ratio is still f/5.6, and the image circle is 66mm surpass the full frame!

Specifications

FRA600

Aperture

108mm

Focal length

600mm

Focal ratio

F5.6

Objective type

Quintuplet flat-field APO (including two ED elements)

Image circle

66mm

Back focus

160mm (from the end of rotator M90x1 thread)

Overall length

493mm

Tube weight

6.5kg

Standard packing weight

7.8kg(not include Aluminum case)

Back-end adapter

M108x1 male thread (no rotator), M90x1 male thread, 2" adapter/ 1.25" adapter

Conical adapter

M90×1-M68×1-M54x0.75-M48×0.75

Accessories

A pair of tube rings, a handle, a dovetail plate, sectional conical tube adapter (with M54X0.75 and M48x0.75 male thread), an
inspection list, a manual
$3,083.56
Askar FRA600 (f/5.6 108mm Quintuplet Astrograph)—
$3,083.56
Product image 1
Product image 2
Product image 3
Product image 4
Product image 5

Description

Askar FRA600/5.6. Following the excellent optical performance of its first FRA400/5.6,the FRA600/5.6 is an evolution of the FRA series, an upgraded lens has a 108mm aperture and a 600mm focal length,the f/ratio is still f/5.6, and the image circle is 66mm surpass the full frame!

Specifications

FRA600

Aperture

108mm

Focal length

600mm

Focal ratio

F5.6

Objective type

Quintuplet flat-field APO (including two ED elements)

Image circle

66mm

Back focus

160mm (from the end of rotator M90x1 thread)

Overall length

493mm

Tube weight

6.5kg

Standard packing weight

7.8kg(not include Aluminum case)

Back-end adapter

M108x1 male thread (no rotator), M90x1 male thread, 2" adapter/ 1.25" adapter

Conical adapter

M90×1-M68×1-M54x0.75-M48×0.75

Accessories

A pair of tube rings, a handle, a dovetail plate, sectional conical tube adapter (with M54X0.75 and M48x0.75 male thread), an
inspection list, a manual