 |
Celestron
Firstscope 102 AZ Refractor
 |
Optical
Design |
102mm
(4.0") refractor |
Focal
Length |
500mm
f/5 |
|
Finderscope |
6x30 |
Mount |
Altazimuth |
|
Eyepiece |
1-1/4"
-20mm (25x) |
Eyepiece |
n/a |
|
Star
Diagonal/Erect Image Eyepiece |
1-1/4"
45 degrees Erect Image |
Accessory
Tray |
yes |
|
Tripod |
Aluminium |
CD
ROM |
The
Sky L1 |
 |
Highest
Useful Magnification |
241x |
Limiting
Stellar Magnitude |
12.5 |
|
Resolution:
Rayleigh |
1.35
arcseconds |
Dawes
Limit |
1.14
arcseconds |
|
Photographic
Resolution |
371
lines/mm |
Light
Gathering Power |
212x
unaided eye |
|
Field
Of View: standard eyepiece |
2
degrees |
Linear
FOV (@1000 yd.) |
105
ft. |
|
Secondary
Mirror Obstruction |
n/a |
Optical
Coatings |
Multi-Coated |
|
Optical
Tube Length |
21" |
Telescope
Weight |
17.5
lb. |
|
 |
 |
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Copyright 2003-2006
Astro Scientific Centre Pte Ltd
