|
Aperture (mm) |
Aperture (in) |
Focal ratio |
Type |
Maker |
Bought |
Sold |
|
108 |
4.2 |
f/10.6 |
Newtonian |
Edmund |
1957 07 04 |
|
|
54 |
2.1 |
f/23.5 |
Achromat |
Jaegers |
1957 12 05 |
2005 03 16 |
|
203 |
8.0 |
f/6.9 |
Newtonian |
Cave |
1959 03 ?? |
|
|
203 |
8.0 |
f/9.9 |
Schmidt-Cassegrain |
1981 12 16 |
1998 01 02 |
|
|
90 |
3.5 |
f/13.9 |
Maksutov-Cassegrain |
1997 11 09 |
1999 01 22 |
|
|
80 |
3.1 |
f/5.0 |
Achromat |
1998 01 12 |
2000 05 08 |
|
|
254 |
10.0 |
f/4.5 |
Newtonian |
1999 02 20 |
2002 05 03 |
|
|
150 |
5.9 |
f/5.0 |
Newtonian |
1999 05 20 |
2001 01 18 |
|
|
102 |
4.0 |
f/9.8 |
Achromat |
1999 11 26 |
2000 02 26 |
|
|
150 |
5.9 |
f/8.0 |
Achromat |
2000 03 01 |
2001 11 30 |
|
|
102 |
4.0 |
f/4.9 |
Achromat |
2000 05 08 |
2001 10 29 |
|
|
152 |
6.0 |
f/5.9 |
Maksutov-Newtonian |
Intes (Orion) |
2000 08 25 |
|
|
130 |
5.1 |
f/5.0 |
Newtonian |
2001 03 07 |
2001 07 07 |
|
|
127 |
5.0 |
f/12.1 |
Maksutov-Cassegrain |
2001 09 12 |
2004 11 18 |
|
|
120 |
4.7 |
f/8.3 |
Achromat |
2001 11 30 |
2005 08 03 |
|
|
279 |
11.0 |
f/4.3 |
Newtonian |
2002 03 22 |
|
|
|
113 |
4.4 |
f/4.0 |
Newtonian |
2002 12 05 |
2004 12 05 |
|
|
127 |
5.0 |
f/7.9 |
Achromat |
2003 12 12 |
2004 03 30 |
|
|
80 |
3.1 |
f/7.5 |
ED Apochromat |
2003 12 15 |
|
|
|
305 |
12.0 |
f/4.9 |
Newtonian |
2004 06 29 |
2005 06 15 |
|
|
100 |
3.9 |
f/9.0 |
ED Apochromat |
2004 08 23 |
|
|
|
40 |
1.6 |
f/10.0 |
Achromat |
2005 03 02 |
|
|
|
150 |
5.9 |
f/8.0 |
Newtonian |
2005 05 27 |
|
|
|
150 |
5.9 |
f/10.0 |
Schmidt-Cassegrain |
2006 12 15 |
|
|
|
279 |
11.0 |
f/10.0 |
Schmidt-Cassegrain |
2007 09 14 |
|
|
|
120 |
4.7 |
F/7.5 |
ED Apochromat |
2009 10 30 |
|
My present eyepieces:
|
Focal length |
Maker |
Type |
Field of view |
Eye relief |
Comments |
|
40mm |
University Optics |
MK-70 König |
70° |
? |
Widest field in 2" size |
|
31mm |
Tele Vue |
Nagler 5 |
82° |
19mm |
New toy! |
|
22mm |
Tele Vue |
Nagler 4 |
82° |
19mm |
Most used low power |
|
16mm |
Tele Vue |
Nagler 2 |
82° |
10mm |
|
|
11mm |
Tele Vue |
Nagler 6 |
82° |
12mm |
New toy! |
|
8.8mm |
Meade |
Ultra Wide |
84° |
9mm |
Most used medium power |
|
6mm |
Tele Vue |
Radian |
60° |
20mm |
|
|
5mm |
Tele Vue |
Radian |
60° |
20mm |
Most used high power |
|
4.8mm |
Tele Vue |
Nagler |
82° |
7mm |
Used for faint variable stars |
|
4mm |
Tele Vue |
Radian |
60° |
20mm |
|
|
Binoviewer pairs |
|
|
|
|
|
|
24.5mm |
Meade |
Super Wide |
67° |
9mm |
Widest field in 1.25" size |
|
12.5mm |
Pocono |
Orthoscopic |
44° |
10mm |
|
|
8.8mm |
Meade |
Ultra Wide |
84° |
9mm |
|
|
10mm |
Antares |
Plössl |
52° |
6mm |
Most used in binoviewer |
|
8mm |
Tele Vue |
Plössl |
50° |
6mm |
|
|
6mm |
Antares |
Orthoscopic |
43° |
4.8mm |
|