• Tighter framing — 2415mm vs 1100mm focal length
• 40% more light-gathering aperture

• Wider field — 1100mm vs 2415mm focal length
• Faster optics at f/7.3 vs f/11.5
• Larger image circle (88mm) — supports bigger sensors

• Small galaxies, planetary nebulae, lunar & planetary detail
• High-resolution long-exposure work
• Faint-object imaging under dark skies

• Medium-sized galaxies and planetary nebulae
• Full-frame astro cameras and DSLRs

• With Full-frame (36×24mm, 3.76µm)
  FOV: 0.85° × 0.57°Scale: 0.32"/px
• With APS-C (23.5×15.7mm, 3.76µm)
  FOV: 0.56° × 0.37°Scale: 0.32"/px
• With IMX533 square (11.3×11.3mm, 3.76µm)
  FOV: 0.27° × 0.27°Scale: 0.32"/px

• With Full-frame (36×24mm, 3.76µm)
  FOV: 1.88° × 1.25°Scale: 0.71"/px
• With APS-C (23.5×15.7mm, 3.76µm)
  FOV: 1.22° × 0.82°Scale: 0.71"/px
• With IMX533 square (11.3×11.3mm, 3.76µm)
  FOV: 0.59° × 0.59°Scale: 0.71"/px

Best suited for experienced imagers chasing detail running a permanent observatory setup.

Best suited for intermediate imagers building a versatile kit running a permanent observatory setup.