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Preston DM-1X spécifications du moteur et différences pratiques par rapport à DM-1 et DM-2
Il y a 18 ans. Le matériel et les prix ont peut-être changé depuis.
Ce que le fil a révélé
- Le DM-1X mesure 117x54x31mm, positionné entre le DM-1 (122x75x33mm) et le DM-2 (100x50x28mm).
- Le DM-1X tourne à 4 tours par seconde, ce qui le rend plus rapide que le DM-1.
- Le DM-1X fournit environ deux fois la puissance du moteur DM-1.
- The DM-1X achieves focus speed comparable to the DM-2 iris calibration speed on Cooke S-4 lenses.
- Despite specifications listing 290 grams for the DM-2 and 415 grams for the DM-1, the DM-1X feels lighter in hand than expected.
- The DM-2 rosetta attachment is too short to fit the DM-1X, while the DM-1 rosetta is too long by approximately 2mm on each side.
- The DM-1X lemo connector keyway faces upward toward the gear, which may cause cable length issues with Arricam LT cameras when using right-angle motor cables mounted from the top.
- The DM-1X output gear spins freely, unlike earlier models where the gear was fixed and required significant force to move.
- The DM-1X costs $3250 plus $62 for the larger output gear, compared to $2885 for the DM-1 and DM-2.
Dépend de
- Rosetta compatibility issue was noted as being addressed but not yet resolved at time of writing.
- Observation about DM-1X feeling lighter than specifications suggest is subjective and may not reflect actual weight difference.
- Cable length issue is specific to right-angle motor cable setups on Arricam LT with top-mounted motors.
- Discussion occurred in 2008 and reflects motor specifications and pricing from that period.