Appendix g: lx200 specifications, Telescope – Leisure Time LX20 User Manual
Page 61
Telescope
Optical Design
7" LX200 f/15
Maksutov-Cassegrain Catadioptric
8" LX200 f/6.3
Schmidt-Cassegrain Catadioptric
10" LX200 f/6.3
Schmidt-Cassegrain Catadioptric
Clear Aperture
178mm (7")
203mm (8")
254mm (10")
Primary Mirror Diameter
194mm (7.625")
209.6mm (8.25)
263.5mm (10.375)
Focal Length
2670mm (105")
1280mm (50.4")
1600mm (63")
Focal Ratio
f/15
f/6.3
f/6.3
Resolution
.64 arc sec.
.56 arc sec
.45 arc sec
Super Multi-Coatings
standard
Standard
Standard
Limiting Visual Magnitude (approx)
13.5
14.0
14.5
Limiting Photographic Magnitude (approx)
16.0
16.5
17.0
Image Scale ("/inch)
.55°/inch
1.14°/inch
0.91 "/inch
Maximum Practical Visual Power
450X
500X
625X
Near Focus
50'
25'
50'
Optical Tube Size
9.1" Dia. x 19" Long
9.1" Dia. x 16" Long
11.75" Dia. x 22" Long
Secondary Mirror Obstruction
2.5" (12.8%)
3.45" (18.6%)
4.0" (16.0%)
Telescope Mounting
Heavy-Duty Fork-Type Double Tine Heavy-Duty Fork-Type Double Tine
Heavy-Duty Fork-Type Double Tine
Setting Circle Diameters
Dec.: 6"; R.A.: 8.75"
Dec.: 6"; R.A.: 8.75"
Dec.: 6"; R.A.: 8.75"
RA Motor Drive System
9-speed, microprocessor
controlled 12v. DC servo motor;
5.75" worm gear with Smart Drive
9-speed, microprocessor controlled
12v. DC servo motor; 5.75" worm
gear with Smart Drive
9-speed, microprocessor controlled
12v. DC servo motor; 5.75" worm
gear with Smart Drive
Hemispheres of Operation
North and South -switchable
North and South -switchable
North and South -switchable
Declination Control System
9-speed, DC servo controlled
5.75" worm gear with Dec drift
software
9-speed, DC servo controlled 5.75"
worm gear with Dec drift software
9-speed, DC servo controlled 5.75"
worm gear with Dec drift software
Motor Drive Gear Diameter
5-3/4" Worm Gear
5-3/4" Worm Gear
5-3/4" Worm Gear
Manual Slow-Motion Controls
Dec. and R.A.
Dec. and R.A.
Dec. and R.A.
Hand Controller
Motorola 68HC05 microcontroller;
2 line x 16 alphanumeric character
display; 19 button keypad, red LED
backlit
Motorola 68HC05 microcontroller; 2
line x 16 alphanumeric character
display; 19 button keypad, red LED
backlit
Motorola 68HC05 microcontroller; 2
line x 16 alphanumeric character
display; 19 button keypad, red LED
backlit
Main Controller
16 MHz 68000 microprocessor; 1
Meg program memory 16KRAM;
512 byte non-volatile memory
(EEROM)
16 MHz 68000 microprocessor; 1 Meg
program memory 16K RAM; 51 2 byte
non-volatile memory (EEROM)
16 MHz 68000 microprocessor; 1 Meg
program memory 16K RAM; 512 byte
non-volatile memory (EEROM)
Telescope Size, Swung Down
9.25" x 16" x 32.5"
9.25" x 1 6 " x 2 5 "
12" x 1 9 " x 3 1 "
35mm Angular Film Coverage
0.74° x 0.52°
1.55°x 1.08°
1. 24° x 0.86°
35mm Linear Film Coverage @:
50"
4.7" X 6.6"
9.7" x 13.6"
7.75" x 10.9"
500"
4.6' X 6.5'
9.4' x 13.3'
7.5' X 10.7'
3000"
27.4' x 38.9'
56.3' X 79.7'
45.0' x 63.8'
Tele-Extender Used Without Eyepiece @:
50'
4.4" x 6.5"
9.1" x 13.3"
7.3" X 10.6"
500'
4.2' x 5.5'
7.7' x 14.1'
6.1' X 9.0'
3000'
24' x 34'
48' x 70'
39' x 56'
Net Telescope Weights (approx)
Telescope
45#
37#
61#
Optional Equatorial Wedge
7#
7#
N/A
Optional Super Wedge
N/A
N/A
26#
Field Tripod
20#
20#
20#
Accessories
8#
8#
a#
Shipping Weights (approx)
Telescope
65#
64# (w/ case)
69#
Equatorial Wedge (optional)
9#
9#
N/A
Super Wedge (optional)
N/A
N/A
38#
Field Tripod
26#
26#
26#
Case (for 10" models)
N/A
N/A
Accessories
5#
5#
5#
6 2
APPENDIX G: LX200
SPECIFICATIONS