Reasons to choose EOS-1D Mark IV
Released in 2009, EOS-1D Mark IV has about 519 mm² of sensor area, 16.1 MP effective resolution, and a 1,230 g body. Use these values to narrow the field, not as an overall image-quality score.


The EOS-1D Mark IV has the larger sensor area. More area usually means greater light-gathering potential, though real image quality still depends on sensor architecture and generation.
These cameras were released 2 years apart. Consider sensor generation when comparing pixel metrics.
Amber marks the value that is generally preferable in this comparison context. It is not an overall camera score.
The EOS-1D Mark IV has the larger sensor area. The Alpha SLT-A35 has the lighter body. The Alpha SLT-A35 has the higher effective resolution. The Alpha SLT-A35 is the newer release. Also consider the lens system and subjects you shoot.
Released in 2009, EOS-1D Mark IV has about 519 mm² of sensor area, 16.1 MP effective resolution, and a 1,230 g body. Use these values to narrow the field, not as an overall image-quality score.
Released in 2011, Alpha SLT-A35 has about 367 mm² of sensor area, 16.2 MP effective resolution, and a 415 g body. Use these values to narrow the field, not as an overall image-quality score.