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Takahashi CCA-250 Tri-Focal Astrograph


Price: $15,160.00


  • Manufacturer: Takahashi
  • MPN: TCK25010
  • SKU: TCK25010
  • Availability: 2 Special Order / Call for Availability

*Is ONLY to the LOWER 48.
Not Alaska/Hawaii/ PR/Guam/Thailand, etc


<p>The CCA-250 is Takahashi&rsquo;s first corrected Cassegrain Astrograph. It was developed as a replacement for the BRC-250 corrected Ritchey. This instrument was developed to take advantage of the digital age and provide image circles to cover large format imaging chips. The large &oslash;88mm can cover these large chip with a flat field filled with pin point stars.<br /> <br /> This astrograph offers versatility. It is a tri-focal instrument that can be used at its native f/5, at f/3.6 with the small and large 645 reducer or at f/7.5.&nbsp; It will support wide field to narrow field imaging.<br /> <br /> The design of this instrument includes a carbon fiber tube and a temperature compensated holder to maintain focus during long exposures. <br /> <br /> During long exposures temperatures can change and cause the optics to change focus. The CCA-250 is equipped with three computer controlled cooling fans that are operated by three sensors: one on the primary, a second in the tube and a third in the air to measure ambient temperature to help prevent image shift working in concert with the carbon fiber tube and temperature compensated holder. This cooling system can also be operated manually.<br /> <br /> The manual controls and computer interface are conveniently located in a control box attached to the rear of the mirror cell.<br /> <br /> The control box also includes an input for the supplied 12v power source and a USB input for computer control of the focusing system.<br /> <br /> The CCA-250 features a computer controlled secondary ASCOM compliant Active Focus system. This enables computer control by programs such as FocusMax or Maxim DL. <br /> <br /> Takahashi&rsquo;s original secondary focusing system was included with the&nbsp; Mewlon-250 and 300 beginning in 1989, this latest refinement uses a pulse motor which allows for the ASCOM compliant focus programs to operate the Active Focus system.<br /> <br /> The CCA-250 employs a corrected cassegrain optical system with a large three element corrector to produce a flat &oslash;88mm circle with Stars 6 microns or less out to 50mm and 10 microns or less out to 88mm.<br /> <br /> Balancing is very important to insure the best possible tracking. The CCa is supplied with a heavy duty 18&rdquo; long dove tail which is an integral part of the tube assembly and a wide 15&rdquo; bridge plate to allow attaching a variety of guide scope if needed. An extra heavy duty saddle plate is also supplied to couple with Takahashi mounts.<br /> <br /> The CCA-250 is a very versatile optical system. It can be used at three different focal lengths 910mm [f/3.6] with the small or large 645 Reducer QE&nbsp; which produces a 60mm flat circle to support large format cameras, 1250mm [ f/5] prime focus and 1880mm [f/7.5] with Extender CR 1.5x.</p> <p><a href="/images/site2/product_copy/15165/cd176359-b59b-4f0d-a3e4-2c3e1bc33f79.pdf"><strong>BACK&nbsp;FOCUS RANGE (28Kb pdf)</strong></a><br /> <br /> <span style="font-size: large;">CR 0.73x Small Reducer</span><br /> &nbsp;&nbsp;&nbsp; <br /> Focal length&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; 910mm<br /> Focal ratio&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; f/3.6<br /> Image circle&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &oslash;38mm<br /> <br /> <span style="font-size: large;">CR 1.5x Extender</span><br /> <br /> Focal length&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; 1880mm<br /> Focal ratio&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; 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Heading" /> </w:LatentStyles> </xml><![endif]--><!-- [if gte mso 10]> <style> /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Century","serif";} </style> <![endif]--></p> <p class="MsoNormal" style="text-align: center;" align="center"><span style="font-size: 16.0pt;">CCA-250</span></p> <p class="MsoNormal" style="text-align: center;" align="center"><span style="font-size: 16.0pt;">&nbsp;</span></p> <p class="MsoNormal"><strong style="mso-bidi-font-weight: normal;">Mechanical<span lang="JA">&atilde;&euro;&euro;</span>Specs</strong></p> <p class="MsoNormal">&nbsp;</p> <p class="MsoNormal">Diameter of main tube:<span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>306mm</p> <p class="MsoNormal">Diameter of dew shield:<span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>321mm</p> <p class="MsoNormal">Length of main tube assy:<span style="mso-spacerun: yes;">&nbsp;&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;</span>855mm</p> <p class="MsoNormal">Weight of main tube:<span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>Approx: 20kgs</p> <p class="MsoNormal">Material of tube:<span style="mso-tab-count: 2;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;&nbsp; </span>Carbon fiber<span style="mso-tab-count: 1;">&nbsp;&nbsp;&nbsp;&nbsp; </span></p> <p class="MsoNormal">Electric focus secondary computer controlled<span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></p> <p class="MsoNormal">&nbsp;</p> <p class="MsoNormal"><strong style="mso-bidi-font-weight: normal;">Optical Specs</strong></p> <p class="MsoNormal">&nbsp;</p> <p class="MsoNormal" style="text-align: left;" align="left">Aperture:<span style="mso-spacerun: yes;">&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;</span>250mm</p> <p class="MsoNormal" style="text-align: left;" align="left">Central Obstruction:<span style="mso-spacerun: yes;">&nbsp;&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;</span>58%</p> <p class="MsoNormal">Focal length: <span style="mso-spacerun: yes;">&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span>1247mm</p> <p class="MsoNormal">Focal ratio:<span style="mso-spacerun: yes;">&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span>f/5.0</p> <p class="MsoNormal">Optical performance:<span style="mso-spacerun: yes;">&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;</span>2 microns RMS-spot radius on axis</p> <p class="MsoNormal"><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;</span>:<span style="mso-spacerun: yes;">&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;</span>3 microns RMS-spot radius 10mm off-axis</p> <p class="MsoNormal"><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;</span>:<span style="mso-spacerun: yes;">&nbsp;&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;</span>3 microns RMS-spot radius 20mm off-axis</p> <p class="MsoNormal"><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;</span>:<span style="mso-spacerun: yes;">&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;</span>4 microns RMS-spot radius 30mm off-axis</p> <p class="MsoNormal"><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;&nbsp;</span>:<span style="mso-spacerun: yes;">&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span>6 microns RMS-spot radius 40mm off-axis</p> <p class="MsoNormal">Image circle: <span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;</span>88mm diameter (60% illuminated)</p> <p class="MsoNormal">Image angular:<span style="mso-spacerun: yes;">&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span>4 degrees diameter</p> <p class="MsoNormal">Back focus/metal back<span style="mso-tab-count: 2;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style="mso-spacerun: yes;">&nbsp; </span>155.4mm</p> <p class="MsoNormal"><span style="mso-tab-count: 3;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>193.9mm with CAA removed <span style="mso-tab-count: 2;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style="mso-tab-count: 2;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;</span></p> <p class="MsoNormal">&nbsp;</p> <p class="MsoNormal"><strong style="mso-bidi-font-weight: normal;">Primary Mirror</strong></p> <p class="MsoNormal"><strong style="mso-bidi-font-weight: normal;">&nbsp;</strong></p> <p class="MsoNormal">Diameter:<span style="mso-spacerun: yes;">&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span>260mm</p> <p class="MsoNormal">Aperture:<span style="mso-spacerun: yes;">&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span>250mm</p> <p class="MsoNormal">Focal ratio: <span style="mso-spacerun: yes;">&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span>f/2.75</p> <p class="MsoNormal">Shape:<span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;</span>Parabola</p> <p class="MsoNormal">Material:<span style="mso-spacerun: yes;">&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;</span>Pyrex</p> <p class="MsoNormal">Coating:<span style="mso-spacerun: yes;">&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span>Enhanced multi-layer aluminum</p> <p class="MsoNormal">&nbsp;</p> <p class="MsoNormal"><strong style="mso-bidi-font-weight: normal;">Secondary Mirror</strong></p> <p class="MsoNormal">&nbsp;</p> <p class="MsoNormal">Diameter: <span style="mso-spacerun: yes;">&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span>125mm</p> <p class="MsoNormal">Shape:<span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span>Sphere</p> <p class="MsoNormal">Material:<span style="mso-spacerun: yes;">&nbsp;&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span>Pyrex</p> <p class="MsoNormal">Coating:<span style="mso-spacerun: yes;">&nbsp;&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;</span>Enhanced multi-layer aluminum</p> <p class="MsoNormal">&nbsp;</p> <p class="MsoNormal" style="text-align: center;" align="center"><strong style="mso-bidi-font-weight: normal;">Conversion Lens Group</strong></p> <p class="MsoNormal">&nbsp;</p> <p class="MsoNormal">Diameter:<span style="mso-spacerun: yes;">&nbsp;&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span>80mm</p> <p class="MsoNormal">Number of lenses: <span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span>3</p> <p class="MsoNormal">Coating: <span style="mso-spacerun: yes;">&nbsp;&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span>Broadband multi-layer anti-reflection coatings</p> <p class="MsoNormal">&nbsp;</p> <p class="MsoNormal"><span style="font-size: 14.0pt;">BRC-250P Conversion Lens Group</span></p> <p class="MsoNormal" style="text-align: center;" align="center">&nbsp;</p> <p class="MsoNormal" style="text-align: center;" align="center">&nbsp;</p> <p class="MsoNormal">645 Reducer 0.72X</p> <p class="MsoNormal">&nbsp;</p> <p class="MsoNormal">Focal length:<span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;</span>898mm</p> <p class="MsoNormal">Focal ratio:<span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;</span>f/3.6</p> <p class="MsoNormal">Optical performance:<span style="mso-spacerun: yes;">&nbsp;&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span>4 microns RMS-spot Radius On axis</p> <p class="MsoNormal"><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;</span>:<span style="mso-spacerun: yes;">&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;</span>4 microns RMS-spot Radius 10mm off-axis</p> <p class="MsoNormal"><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;</span>:<span style="mso-spacerun: yes;">&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;&nbsp;</span>5 microns RMS-spot Radius 20mm off-axis</p> <p class="MsoNormal"><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;</span>:<span style="mso-spacerun: yes;">&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span>6 microns RMS-spot Radius 30mm off-axis</p> <p class="MsoNormal">Image circle:<span style="mso-spacerun: yes;">&nbsp;&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;</span>60mm diameter (60% illuminated)</p> <p class="MsoNormal">Image angular:<span style="mso-spacerun: yes;">&nbsp;&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span>3.8 degrees diameter</p> <p class="MsoNormal">&nbsp;</p> <p class="MsoNormal">Reducer-QE 0.73X</p> <p class="MsoNormal">&nbsp;</p> <p class="MsoNormal">Focal length:<span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span>910mm</p> <p class="MsoNormal">Focal ratio:<span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>f/3.6</p> <p class="MsoNormal">Optical performance:<span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;</span>4 microns RMS-spot radius on axis</p> <p class="MsoNormal"><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;</span>:<span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;</span>7 microns RMS-spot Radius 10mm off-axis</p> <p class="MsoNormal"><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;</span>:<span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;</span>10 microns RMS-spot Radius 20mm off-axis</p> <p class="MsoNormal">Image circle:<span style="mso-spacerun: yes;">&nbsp;&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span>40mm diameter (60% illuminated)</p> <p class="MsoNormal">Image angular:<span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;&nbsp;</span>2.5 degrees diameter</p> <p class="MsoNormal">&nbsp;</p> <p class="MsoNormal">Extender-ED 1.5X</p> <p class="MsoNormal">&nbsp;</p> <p class="MsoNormal">Focal length:<span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;</span>1885mm</p> <p class="MsoNormal">Focal ratio:<span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;</span>f/7.5</p> <p class="MsoNormal">Optical performance:<span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>4 microns RMS-spot radius on axis</p> <p class="MsoNormal"><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;&nbsp;</span>:<span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>6 microns RMS-spot radius 10mm off-axis</p> <p class="MsoNormal"><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;&nbsp;</span><span style="mso-spacerun: yes;">&nbsp;</span>:<span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp;</span>20 microns RMS-spot radius 20mm off-axis</p> <p><a href="/images/site2/product_copy/15165/c9aff102-440f-49f1-9499-48cd3c1f680b.jpg"><img src="/images/site2/product_copy/15165/72fe2dcb-c67c-40d9-8971-b0f3fd039954.jpg" alt="" width="250" height="183" /></a>&nbsp; Click to enlarge</p> <p>&nbsp;</p> <p><img src="/images/site2/product_copy/15165/fa2857e1-9dab-4795-85c9-94076782730a.jpg" alt="" width="220" height="220" /></p> <p><img src="/images/site2/product_copy/15165/6c1da319-b673-4547-b02f-db4e8c778a88.jpg" alt="" width="220" height="220" /></p> <p><img src="/images/site2/product_copy/15165/e1c6ec26-10eb-48e2-bd2c-f604292b5eec.jpg" alt="" width="220" height="220" /></p> <p><img src="/images/site2/product_copy/15165/c35c4164-0d94-4a29-b4e2-8099f4e4b6c8.jpg" alt="" width="220" height="220" /></p> <p><!-- [if gte mso 9]><xml> <w:WordDocument> <w:View>Normal</w:View> <w:Zoom>0</w:Zoom> <w:PunctuationKerning /> <w:ValidateAgainstSchemas /> <w:SaveIfXMLInvalid>false</w:SaveIfXMLInvalid> <w:IgnoreMixedContent>false</w:IgnoreMixedContent> <w:AlwaysShowPlaceholderText>false</w:AlwaysShowPlaceholderText> <w:Compatibility> <w:BreakWrappedTables /> <w:SnapToGridInCell /> <w:WrapTextWithPunct /> <w:UseAsianBreakRules /> <w:DontGrowAutofit /> </w:Compatibility> <w:BrowserLevel>MicrosoftInternetExplorer4</w:BrowserLevel> </w:WordDocument> </xml><![endif]--><!-- [if gte mso 9]><xml> <w:LatentStyles DefLockedState="false" LatentStyleCount="156"> </w:LatentStyles> </xml><![endif]--><!-- [if gte mso 10]> <style> /* Style Definitions */ 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