Size and Weight Comparison
Size of a lens is an important deciding factor when comparing two lenses.Venus 33mmF0.95 CF APO is the longer of the two lenses at 83mm. The Sony FE 35mm F1.8 with a length of 73mm is 10mm shorter. Besides being longer, the Venus 33mmF0.95 CF APO also has a larger diameter of 72mm compared to Sony FE 35mm F1.8's 66mm diameter.
Weight of a lens is as important as its external dimensions, especially if you are planning to hand hold your camera and lens combination for longer periods. Sony FE 35mm F1.8 weighs 280g, 52% (310g) lighter than the Venus 33mmF0.95 CF APO's weight of 590g.
Both Venus 33mmF0.95 CF APO and Sony FE 35mm F1.8 has the same Sony E lens mount. Some of the latest released cameras that are compatible with the Sony E lenses are Sony FX30, Sony ZV-E10 and Sony A6600.
Venus 33mmF0.95 CF APO is a prime lens with fixed focal lenght of 33mm which has a 35mm equivalent focal range of 49.5mm when used on a APS-C / DX format camera. Sony FE 35mm F1.8 is a prime lens with fixed focal lenght of 35mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides an 35mm (FF) equivalent of 52.5mm.