- Start at 2.0 exit-pupil for DSO’s
- Ultrablock ideal range is below 10x/inch of aperture
Mag = ScopeLength / EyepieceLength tFoV = aFoV / Mag Pupil = Aper / Mag
Scopes
Name | Aper. | Length | F | Zoom | Max Mag | Max 1” | Max 2” | Dawes / Rayleigh
--------|-------|--------|-----|------|---------|--------|--------|------------------
ST80 | 80 | 400 | f/5 | 160x | +13.26 | 3.94° | 6.59° | 1.45”
AT102ED | 102 | 714 | f/7 | 204x | +13.78 | 2.21° | 3.69° | 1.14” / 1.36”
AT102ED
Eyepiece | aFoV | Len | . | Mag | tFoV | Pupil
-----------|------|-----|---|------|-------|-------
ATUWA2” | 82.0 | 28 | | 26x | 3.20° | 3.9mm
ATUWA1.25” | 82.0 | 13 | | 55x | 1.50° | 1.9mm
SV2151.25” | 56.0 | 8 | | 89x | 0.60° | 1.1mm
| 56.0 | 7 | | 102x | 0.55° | 1.0mm
| 56.0 | 6 | | 119x | 0.47° | 0.9mm
| 56.0 | 5 | | 143x | 0.39° | 0.7mm
| 56.0 | 4 | | 178x | 0.31° | 0.6mm
| 56.0 | 3 | | 238x | 0.24° | 0.4mm
ST-80
Eyepiece | aFoV | Len | . | Mag | tFoV | Pupil
-----------|------|-----|---|-----|------|-------
SV1351.25” | 40.0 | 21 | | 19x | 2.1° | 4.2mm
| 41.2 | 20 | | 20x | 2.1° | 4.0mm
| 42.4 | 19 | | 21x | 2.0° | 3.8mm
| 43.6 | 18 | | 22x | 2.0° | 3.6mm
| 44.8 | 17 | | 24x | 1.9° | 3.3mm
| 46.0 | 16 | | 25x | 1.8° | 3.2mm
| 47.2 | 15 | | 27x | 1.7° | 3.0mm
| 48.4 | 14 | | 29x | 1.7° | 2.8mm
| 49.6 | 13 | | 31x | 1.6° | 2.6mm
| 50.8 | 12 | | 33x | 1.5° | 2.4mm
| 52.0 | 11 | | 36x | 1.4° | 2.2mm
| 53.2 | 10 | | 40x | 1.3° | 2.0mm
| 54.4 | 9 | | 44x | 1.2° | 1.8mm
| 55.6 | 8 | | 50x | 1.1° | 1.6mm
| 56.8 | 7 | | 57x | 1.0° | 1.4mm
Art Supplies
Art Supplies
- Clipboard with two storage units
- 3-mode Flexible-Arm Red Light
- Black Art Paper
- White Acrylic
- 600 grit Sand Paper
- General’s 558 White Charcoal Pencils
- Kneaded Eraser
- ¼” Smudge Stick
- #2 Fan Brush
- ¼” Angular Brush
- 3/8” Angular Brush (Trimmed down)
- 5/0 Detail Brush
- Knife
The General’s White Charcoal Pencils are hand-sharpened using the knife to create long fine points. Conventional pencil sharpeners would often crack the charcoal.
The 3/8” Angular Brush was trimmed down to create thick and strong bristles. I use this brush to help create a “textured” landscape in lunar sketches.
