• Tighter framing — 1624mm vs 1100mm focal length
• 35% more light-gathering aperture
• Lighter (10kg vs 13.5kg) — easier to travel with

• Wider field — 1100mm vs 1624mm focal length
• Faster optics at f/7.3 vs f/8
• 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
• Full-frame astro cameras and DSLRs

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

• With Full-frame (36×24mm, 3.76µm)
  FOV: 1.27° × 0.85°Scale: 0.48"/px
• With APS-C (23.5×15.7mm, 3.76µm)
  FOV: 0.83° × 0.55°Scale: 0.48"/px
• With IMX533 square (11.3×11.3mm, 3.76µm)
  FOV: 0.40° × 0.40°Scale: 0.48"/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 backyard imaging setup.

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