Model: Apo 203/1420 CNC-LW II
The 203mm f/7 Apo is our new large imaging machine. Soon a matched field flattener for up to 6x7cm film format will follow. Optical again did a superlative job in designing this large color free Apo, even given the challenge of its very fast speed. LZOS did a stunning job implementing this lens within these design parameters. The image quality and color correction of this new fast model are so exceptional that you can utilize similar visual magnification as with our famous f/9 model. We recently had a wonderful first light experience with this new model. Mars was pushed up to 500x with great sharpness and contrast. The Veil Nebula was viewed with great detail under moderately light polluted sky without any nebula filter, all thanks to the great contrast. The tube rings are flat on both sides and offer five tapped 1/4-20 inch holes perpendicular to the tube line with one centered. The middle two hole's center to center spacing is 60mm (2.362") and outer two hole's spacing is 3.2" (Astro-Physics standard). Due to the relatively short length and large lens/cell, this model is quite front heavy. Therefore we offer to our customers, for additional charge, the installation inside the tube of extra counterweights for proper balancing. Discuss this with us when you place your order, such that we can build in the balance point you like on your incredible, custom made, 8" f/7 Apo.


• Optical tube
• 3.5" Starlight focuser
• Set CNC tube rings
• 2" Extension 80 mm long
• 2"/1.25" adapter
• 50mm finder bracket
• 2 steel rails and 4 magnetic balancing weights

Technical Datas:
• shortest length for transportation : 1260mm = 49.60 inch
• Observing length: 1520mm = 59.84 inch
• Weight - Optical tube without finder bracket: 24.9kg = 54.78 lbs
• Weight - Optical tube with tube rings and finder bracket: 28kg = 61.60 lbs
• Tube outside diameter: 238mm = 9.37 inch
• Dew shield outside diameter: 271mm = 10.66 inch
• Dew shield outer length: 420mm = 16.53 inch
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