{"product_id":"planewave-delta-rho-280-f-2-75","title":"OBSERVABLE SPACE DELTA RHO 280 f\/2.75","description":"\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003ePrices do not include shipping costs. Contact us for exact shipping prices before purchasing.\u003c\/strong\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Observable Space (PlaneWave) \u003cstrong\u003eDelta Rho 280 f\/2.75 \u003c\/strong\u003eis an elite widefield astrograph designed for a broad range of applications including\u003cstrong\u003e \u003c\/strong\u003eSpace Situational Awareness\u003cstrong\u003e (SSA)\u003c\/strong\u003e, Space Domain Awareness \u003cstrong\u003e(SDA)\u003c\/strong\u003e, professional \u003cstrong\u003eastronomy research \u003c\/strong\u003eand \u003cstrong\u003edeep sky astrophotography\u003c\/strong\u003e. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWith rock-solid \u003cstrong\u003efused silica mirrors\u003c\/strong\u003e, \u003cstrong\u003ecarbon fibre construction\u003c\/strong\u003e and an advanced baffled \u003cstrong\u003e55mm corrected image circle\u003c\/strong\u003e, the Delta Rho 280 is the capable of capturing the most stunning astrophotographs possible.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe Cassegrain focus f\/2.75 astrograph has an \u003cstrong\u003eaperture of 280mm (11\")\u003c\/strong\u003e and has a \u003cstrong\u003efocal length of 770.6mm\u003c\/strong\u003e. Additionally, the Delta Rho 280 provides a \u003cstrong\u003ehuge 55mm corrected image circle\u003c\/strong\u003e so your astrophotographs will have stunning clarity from corner to corner of the image without field curvature degrading the photos.\u003c\/p\u003e\n\u003cp\u003eBeing a fast imaging system, the Delta Rho has a \u003cstrong\u003efixed primary mirror\u003c\/strong\u003e, similar to the CDK series. In addition, the new PlaneWave-designed \u003cstrong\u003eSeries 5\u003c\/strong\u003e \u003cstrong\u003eultra-short derotator\u003c\/strong\u003e and \u003cstrong\u003efocuser includes a tip\/tilt adapter\u003c\/strong\u003e, making tilt adjustment very easy.\u003c\/p\u003e\n\u003cp\u003eAs \u003cstrong\u003eAustralia's PlaneWave experts\u003c\/strong\u003e, we can supply all the components necessary for utilizing complex imaging trains as well as the \u003cstrong\u003ePrima Luce Lab Esatto and Arco with a custom adapter\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eCollimation is extremely straightforward, needing only simple adjustment of the three secondary mirror collimation screws. Multiple cooling fans on the telescope's backplate and sides of the optical tube allow the mirrors to quickly reach thermal equilibrium.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e \u003cstrong\u003eSeries-5 Rotator\u003c\/strong\u003e and \u003cstrong\u003eFocuser\u003c\/strong\u003e are \u003cstrong\u003enot included\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCarbon fibre tube minimizes thermal expansion, which causes focus shift as temperature changes during an imaging session. Carbon fibre also reaches ambient temperatures quickly and is extremely lightweight and rigid to help ensure excellent imaging data is produced.\u003c\/li\u003e\n\u003cli\u003eDovetail Expansion Joint allows \u003cspan\u003efor the difference in thermal expansion between carbon fibre and aluminium. The expansion joint allows the aluminium dovetail to expand and contract without stressing the carbon fibre lower truss.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eCooling fans are strategically placed on the backplate and sides of the tube to quickly cool the mirrors to ambient temperature. Built-in heating pads and temperature sensors for the primary and secondary mirrors (controllable via the Series 5 controller, sold separately).\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAdvanced precision positioned, lightweight baffle tubes minimize vignetting and maximize image contrast. \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch5\u003eSpecifications\u003c\/h5\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOptical system\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable class=\"specificationTable\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003eAperture\u003c\/th\u003e\n\u003ctd\u003e280 mm\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003eFocal length\u003cbr\u003e\n\u003c\/th\u003e\n\u003ctd\u003e770.6 mm\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003eFocal ratio\u003cbr\u003e\n\u003c\/th\u003e\n\u003ctd\u003ef\/2.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003eCentral obstruction\u003cbr\u003e\n\u003c\/th\u003e\n\u003ctd\u003e63% by diameter\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003eBackfocus from mounting surface\u003cbr\u003e\n\u003c\/th\u003e\n\u003ctd\u003e163 mm (108 mm from racked-in focuser)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003eOTA length\u003cbr\u003e\n\u003c\/th\u003e\n\u003ctd\u003e451 mm\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003eOptimal field of view\u003c\/th\u003e\n\u003ctd\u003e55 mm image circle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003eUpper cage\u003cbr\u003e\n\u003c\/th\u003e\n\u003ctd\u003eCarbon fibre tube\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003e\u003cspan\u003eWeight\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd\u003e14.5 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePrimary mirror\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable class=\"specificationTable\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003eOptical diameter\u003cbr\u003e\n\u003c\/th\u003e\n\u003ctd\u003e280 mm\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003eOuter diameter\u003c\/th\u003e\n\u003ctd\u003e300 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003eMaterial\u003cbr\u003e\n\u003c\/th\u003e\n\u003ctd\u003eFused silica (quartz)\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003eShape\u003cbr\u003e\n\u003c\/th\u003e\n\u003ctd\u003eAspheric\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003eCoating\u003cbr\u003e\n\u003c\/th\u003e\n\u003ctd\u003eEnhanced aluminium - 360-820 nm optimized\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSecondary mirror\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable class=\"specificationTable\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003eDiameter\u003cbr\u003e\n\u003c\/th\u003e\n\u003ctd\u003e170 mm\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003eMaterial\u003cbr\u003e\n\u003c\/th\u003e\n\u003ctd\u003eFused silica (quartz)\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003eShape\u003cbr\u003e\n\u003c\/th\u003e\n\u003ctd\u003eSpherical\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003eCoating\u003cbr\u003e\n\u003c\/th\u003e\n\u003ctd\u003eEnhanced aluminium - 360-820 nm optimized\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLens group\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable class=\"specificationTable\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003eDiameter\u003cbr\u003e\n\u003c\/th\u003e\n\u003ctd\u003e120 mm\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003eCoating\u003cbr\u003e\n\u003c\/th\u003e\n\u003ctd\u003e\u003cspan\u003eBroadband AR coatings (less than 1% reflected from 400 to 800nm)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch5\u003eIncluded items\u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDelta Rho 280 optical tube\u003c\/li\u003e\n\u003cli\u003eOTA cover\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Testar Australia","offers":[{"title":"Default Title","offer_id":48295246790881,"sku":null,"price":15999.0,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0071\/4935\/5059\/files\/DR280-argus.jpg?v=1778117251","url":"https:\/\/www.testar.com.au\/products\/planewave-delta-rho-280-f-2-75","provider":"Testar Australia","version":"1.0","type":"link"}