... arm and head for easy storage 1) Item/model: HT/A201, HT/A 301, HT/A 401, HT/A 401+ 2) Aperture: 285mmx285mm 3) Folding: arm and ... head 4) Objective lens: a) HT/A201: 1-element f=290b) HT/A301, HT ... +:1-element f=290 5) Lamp/life: a) HT/A201, HT/A301: EHJ 24V 250W/50hb) HT/A401, HT/A401+: EVD 36V 400W/50h6) Dual ...