Addendum - Tables |
EAF Focus Table TSO 90/600 APO |
updated: 2025-02-27 |
Review Required
see also: ZWO Electronic Automatic Focuser EAF Advanced
Optimal EAF Focuser Start Positions for the Main Camera (active configurations only)
|
Label |
Old Label |
Active |
Specifier |
L: Scope or Lens |
L: Tube Length [mm] |
L: FoL [mm] |
C: Camera |
E: Tube Ext. [mm] |
O: Other |
T: Tail Length [mm] |
V: Focuser Point [mm] |
V: EAF Focus [steps] |
EAFMax [steps] |
Max Travel Distance [mm] |
|
TS600AS294 |
Config04c |
Y |
TS600AS294E100T77 |
TSO APO 90/600 |
283,96 |
599,00 |
ASI294MC-Pro |
100,00 |
M63 WO Rotator |
77,95 |
59,84 |
19307 |
28661 |
88,83 |
|
TS600AS294-E5 |
Config02 |
Y |
TS600AS294E50T122 |
TSO APO 90/600 |
283,96 |
599,00 |
ASI294MC-Pro |
50,00 |
|
122,50 |
65,29 |
21066 |
28661 |
88,83 |
|
TS600AS294-EP06 |
Config06 |
Y |
TS600AS294EP6E100T105 |
TSO APO 90/600 |
283,96 |
599,00 |
ASI294MC-Pro |
100,00 |
Eyepiece Projector 6mm |
105,50 |
32,29 |
10418 |
28661 |
88,83 |
|
TS600AS294-EP10 |
Config06a |
Y |
TS600AS294EP10E100T105 |
TSO APO 90/600 |
283,96 |
599,00 |
ASI294MC-Pro |
100,00 |
Eyepiece Projector 10mm |
105,50 |
32,29 |
10418 |
28661 |
88,83 |
|
TS600AS294-h |
|
Y |
TS600AS294E100T68 |
TSO APO 90/600 |
283,96 |
599,00 |
ASI294MC-Pro |
100,00 |
|
68,95 |
68,84 |
22211 |
28661 |
88,83 |
|
TS600AS294-R |
Config05 |
Y |
TS600AS294R75E50T69 |
TSO APO 90/600 |
283,96 |
599,00 |
ASI294MC-Pro |
50,00 |
Riccardi 0,75 Reducer |
69,50 |
118,29 |
Invalid |
28661 |
88,83 |
|
Label |
Old Label |
Active |
Specifier |
L: Scope or Lens |
L: Tube Length [mm] |
L: FoL [mm] |
C: Camera |
E: Tube Ext. [mm] |
O: Other |
T: Tail Length [mm] |
V: Focuser Point [mm] |
V: EAF Focus [steps] |
EAFMax [steps] |
Max Travel Distance [mm] |
|
TS600FUXT3 |
Config12 |
Y |
TS600FUXT3E100T83 |
TSO APO 90/600 |
283,96 |
599,00 |
FU-XT3 |
100,00 |
|
83,40 |
54,39 |
18589 |
28661 |
88,83 |
EAF Focuser Characteristics on TSO 90/600 Telescope
Warning: the measured step sizes are not 100% accurate and apply only after resetting the EAF (GoTo 0)
|
Focuser Position on Scale |
Focuser Tail Length inc. M63/M48 Adapter |
Focuser Tail Length |
EAF Step Position |
|
EAF MIN Position |
4.47 mm |
0 |
00000 |
|
0.0 cm |
7.76 mm |
2.14 |
800 |
|
40 mm |
47.76 mm |
42.14 |
14550 |
|
80 mm |
87.76 mm |
82.14 |
28070 |
|
EAF MAX Position focuser totally out, several different results |
88.83 mm |
|
|
|
Measured Backslash |
20 steps (see also: EAF Backslash Compensation) |
||
|
Focuser Gear Ratio |
342 steps / mm (or 365 EAF positions / cm) or 0.002926 mm / step |
||
|
Measurement inaccuracy |
0.45% steps (see also: EAF Performance ) |
||
Measured Focus Points during Observation at 10°C and using Config04c (L:1_E:100_C:1_O:-_T:83.9_F:UHC2) with an UHC 2" Filter:
|
Measurement # |
Configuration |
Outside Temperature |
EAF Best Focus Step Position |
|
1 |
Config04c - L:1_E:100_C:1_O:-_T:83.9_F:- |
15°C |
22403 |
|
2 |
Config04c - L:1_E:100_C:1_O:-_T:83.9_F:UHC2 |
11°C |
22392 |
|
3 |
Config04c - L:1_E:100_C:1_O:-_T:83.9_F:UHC2 |
11°C |
22383 |
|
4 |
Config04c - L:1_E:100_C:1_O:-_T:83.9_F:UHC2 |
10°C |
22360 |
|
5 |
Config04c - L:1_E:100_C:1_O:-_T:83.9_F:UHC2 |
09°C |
22352 |
|
6 |
Config04c - L:1_E:100_C:1_O:-_T:83.9_F:UHC2 |
09°C |
22345 |
|
Average Step Position |
~ 22373 |
||
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