per‑scope DSO calendar for Switzerland (≈46°N), tuned to:

• 400 mm f/5 (widefield) – APS‑C

• 700 mm f/7 (medium) – APS‑C

• 1000 mm f/4 (detail) – APS‑C

• 2000 mm f/10 (high‑detail) – APS‑C

January

• 400 mm: Orion widefield (M42 + Running Man + NGC 1977), Rosette, Pleiades

• 700 mm: M42 + Running Man framed, Rosette core, California segments

• 1000 mm: M78, Monkey Head, Flame + part of Horsehead region

• 2000 mm: Horsehead close‑up, Flame core, small reflection nebulae in Orion

February

• 400 mm: California full, Cone/Christmas Tree widefield

• 700 mm: Cone/Christmas Tree tighter, Monkey Head

• 1000 mm: Cone core, Medusa (long integration)

• 2000 mm: Small planetaries in Gemini/Orion, tight Cone structures

March

• 400 mm: Leo Triplet wide, M81+M82 in same frame

• 700 mm: Leo Triplet tighter, M101 nicely framed

• 1000 mm: M81, M82, NGC 2903 with good detail

• 2000 mm: Detailed M82, small galaxies in Ursa Major and Leo

April

• 400 mm: Markarian’s Chain widefield in Virgo

• 700 mm: M51 + NGC 5195, M64

• 1000 mm: M51 detail, Sombrero (M104), Needle (NGC 4565)

• 2000 mm: Edge‑on galaxies (NGC 4565, NGC 4216, etc.), compact Virgo galaxies

May

• 400 mm: Wide Virgo/Coma galaxy fields, Milky Way rising

• 700 mm: M63, M94, Whale/Hockey Stick pair

• 1000 mm: Whale (NGC 4631), Hockey Stick (NGC 4656) with structure

• 2000 mm: Compact galaxies in Canes Venatici/Virgo, small groups

June

• 400 mm: Lagoon + Trifid in one frame, early Milky Way core

• 700 mm: Lagoon (M8), Trifid (M20) individually

• 1000 mm: M13, M92, M5 globular clusters

• 2000 mm: Globular cores, small galaxies in Bootes/Serpens

July

• 400 mm: Scutum star clouds, M8/M20 region, dark nebulae

• 700 mm: Eagle (M16), Omega (M17) framed nicely

• 1000 mm: Eagle Pillars, Omega core, Cat’s Paw (low but possible)

• 2000 mm: Planetary nebulae in Sagittarius/Scutum, tiny emission knots

August

• 400 mm: North America, Pelican, Veil complex, Sadr region

• 700 mm: Individual Veil arcs, Crescent (NGC 6888) framed

• 1000 mm: Crescent detail, smaller Cygnus nebulae

• 2000 mm: Tiny planetaries and compact knots in Cygnus

September

• 400 mm: Andromeda (M31), Heart Nebula, wide Cassiopeia fields

• 700 mm: Triangulum (M33), Pacman (NGC 281)

• 1000 mm: Bubble (NGC 7635), Pacman core

• 2000 mm: Bubble close‑up, small galaxies around M31

October

• 400 mm: Heart + Soul widefield

• 700 mm: Soul core, IC 342

• 1000 mm: NGC 891, NGC 7331

• 2000 mm: Stephan’s Quintet, tight NGC 891/7331 framing

November

• 400 mm: High Andromeda, wide Perseus/Cassiopeia fields

• 700 mm: M33, M74

• 1000 mm: NGC 1023, detailed M33

• 2000 mm: Small galaxies in Andromeda/Perseus, compact groups

December

• 400 mm: Orion Complex widefield, Barnard’s Loop (great for narrowband)

• 700 mm: M42 + Running Man, Rosette

• 1000 mm: M78, Monkey Head, Flame

• 2000 mm: Horsehead close‑up, Flame core, tiny reflection nebulae