Askar SQA55 Quintuplet air-spaced SD glass Petzval astrograph - SQA55
Specifications
|
SQA55 Parameters |
||
|
Aperture size |
55mm |
|
|
Focal length |
264mm |
|
|
Focal ratio |
f/4.8 |
|
|
Objective lens |
Quintuplet petzval APO（One piece of SD glass, one piece of ED glass） |
|
|
Format specifications |
44mm |
|
|
Aperture blades |
14 pieces |
|
|
Graded Aperture |
f/4.8-f/22 |
|
|
Closest Focus Distance |
5m |
|
|
Focusing mode |
Manual focus |
|
|
Filter Diameter |
M67 |
|
|
Total length |
316mm (including dew shield); 244mm (without dew shield) |
|
|
OTA weight |
1.84kg |
|
|
Total weight (including handle & dovetail plate) |
2.18kg |
|
|
Rear-end adapter |
M48*0.75 (with M48×0.75 filter thread) |
|
|
Rear-end connection distance |
Support 50-60mm range (Recommended connection length is 55mm) |
|
|
Standard package items |
a SQA55 OTA, a military-grade waterproof hand-carrying case |
|
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
Specifications
|
SQA55 Parameters |
||
|
Aperture size |
55mm |
|
|
Focal length |
264mm |
|
|
Focal ratio |
f/4.8 |
|
|
Objective lens |
Quintuplet petzval APO（One piece of SD glass, one piece of ED glass） |
|
|
Format specifications |
44mm |
|
|
Aperture blades |
14 pieces |
|
|
Graded Aperture |
f/4.8-f/22 |
|
|
Closest Focus Distance |
5m |
|
|
Focusing mode |
Manual focus |
|
|
Filter Diameter |
M67 |
|
|
Total length |
316mm (including dew shield); 244mm (without dew shield) |
|
|
OTA weight |
1.84kg |
|
|
Total weight (including handle & dovetail plate) |
2.18kg |
|
|
Rear-end adapter |
M48*0.75 (with M48×0.75 filter thread) |
|
|
Rear-end connection distance |
Support 50-60mm range (Recommended connection length is 55mm) |
|
|
Standard package items |
a SQA55 OTA, a military-grade waterproof hand-carrying case |
|
