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

Resolution

.64 arc sec.

.56 arc sec

.45 arc sec

Super Multi-Coatings

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"

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

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

Motor Drive Gear Diameter

5-3/4" Worm Gear

Manual Slow-Motion Controls

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

N/A

Optional Super Wedge

N/A

26#

Field Tripod

20#

Accessories

Shipping Weights (approx)
Telescope

65#

64# (w/ case)

69#

Equatorial Wedge (optional)

N/A

Super Wedge (optional)

N/A

38#

Field Tripod

26#

Case (for 10" models)

N/A

Accessories

6 2

APPENDIX G: LX200
SPECIFICATIONS