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The SharpStar 72-ED 72mm f5.5 Apochromatic telescope is a premium air-spaced doublet ED Glass design. It features premium O'Hara Japanese FPL-53 glass and all optical surfaces fully muti-coated for maximum performance. The SharpStar 72-ED 72mm f5.5 Apochromatic telescope provides an excellent balance between visual observation and astroimaging performance.
The unique design takes advantage of O'Hara's world leading FPL53 Super ED Glass technology to enable excellent colour correction, pinpoint sharp star images, and excellent field flatness for astroimaging. The SharpStar 72-ED 72mm f5.5 Apochromatic telescope features a class leading optical system, plus an impressive ultra smooth precision dual speed focusing system.
Using a premium dual-speed 2 inch rack & pinion wide engagement focusing process, with a dual speed focus ratio of 1:10. When compared with most standard refractors which use standard focusing devices (usually Crayford) excluding this wide engagement tooted rack & pinion design, this wide engagement tooted rack & pinion enables a significantly more reliable, smooth and precise focus operation. Plus enabling the popular slightly heavier DSLR and CCD systems to be utilised on this telescope with better stability and focus results. The focuser will not encounter the common focus slipping, out of focus movement and frustrations common with mass produced dual speed units.
The is also a 360-degree rotating camera angle adjustment allowing easy rotation, so you can image with the full satisfaction you seek. The focusing also uses anti marring brass compression bands so your valuable accessories barrels are not scratched or marked. The SharpStar 72-ED 72mm f5.5 Apochromatic telescope provides a fast focal ratio typical of premier ED Glass systems and APO performance using premier quality FPL-53 Super ED glass, a 2-inch full sized dual-speed gear focusing device, and its a highly cost effective and very competitive offering for your consideration.
SharpStar 72-ED 72mm f5.5 Apochromatic telescope specifications:
Focal length 400mm (f/5.5)
Objective type air-spaced apochromatic
Net weight 1.49KG
Resolution 1.7arc seconds
Limiting visual magnitude 11.4
Tube OD 80mm
Main tube length 356mm (lens shade extended) 328mm (lens shade retracted)
SharpStar 72-ED 72mm f5.5 Apochromatic telescope characteristics：
• 72mm f / 6 fully multi-coated doublet design
• Contains 1 ED lens of Japanese O'Hara FPL - 53 super ED Glass
• New "Wide Engagement" dual-speed 2 inch rack and pinion control gear, 10:1 micro-drive focus
• 2 inch and 1.25inch capability
• 360 degree rotation angle regulator
• Tube ring set and universal dovetail
• Standard finder bracket