Focal length: 18mm Diameter: 20.6mm Lens structure: 5 elements/ 3 groups Eye relief : 20mm Field of view: 55.0 degree Barrel: 1.25'' Construction: aluminum Coating: Fully Multi-Coating weight: 153 g Availability: Usually ships the next business day 18LERRegular price: $89.95Smart-Sale price: 888.291.6577 To all who visit our store: Numbers 6:24-26 24 The LORD bless you and protect you; 25 the LORD make His face shine on you, and be gracious to you; 26 the LORD look with favor on you and give you peace. (CLICK) VISIT OUR DISCOUNT BIBLES & APPAREL STORE Copyright (R) 2004 SmartAstronomy, All rights reserved.