{"product_id":"sharpstar-z4","title":"Sharpstar Z4 100 APO","description":"\u003cp\u003e\u003cstrong\u003eAskar Sharpstar Z4 100mm f\/5.5 6-Element Flatfield Apo.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cspan style=\"text-decoration: underline;\"\u003eNote\u003c\/span\u003e: These Telescopes are ordered directly from the Manufacturer which can have an additional lead time. Feel free to contact us for more info if needed.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eThe Z4 is a sextuplet astrograph with three pieces of lens at the front and three pieces at the back, and two of them are ED glasses.\u003c\/p\u003e\n\u003cp\u003eJust like other Sharpstar astrographs, the Z4 is designed as self-flattening so there is no need to calculate the back focus. You can just focus the target and the optical system is perfectly corrected for imaging. It is especially ideal for capturing stunning wide-field images of the deep sky over a 36mm (APS-C) sized image circle, however the Z4 is not recommended for use with full-frame cameras.\u003c\/p\u003e\n\u003cp\u003eThe tube ring has a handle on the top which makes it easy to carry and assemble. The handle is also designed as a slot where you can mount a finder base etc.\u003c\/p\u003e\n\u003cp\u003eThe entire tube has a length of just 482mm with the dew shield retracted and it weighs just 4.3kg. It has a back focus of 77mm, so common M48-rings will work fine when using DSLR cameras or you can use astronomical cameras with accessories.\u003c\/p\u003e\n\u003cp\u003eThe Z4 uses a large 3.4\" focuser with a 1:10 fine adjustment knob and a 360° rotator for easy focusing and angle adjustment. It has M86, M68, M54, M48 adapters, and the M48 one has an internal thread that can fit 2\" filters.\u003c\/p\u003e\n\u003cp\u003eA 300mm Vixen-style dovetail plate also makes it easier to balance on the equatorial mount.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpec:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eObjective lens: Fully air-spaced sextuplet apo (including two ED glasses)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eAperture: 100mm\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFocal Length: 550mm\u003c\/li\u003e\n\u003cli\u003eFocal ratio: f\/5.5\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eImage circle: 36mm\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFocuser: 3.4\" rack and pinion, dual speed\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eBack focus: 77mm from the M48 thread\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eRear-end thread: M48x0.75 male thread\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eAdapters: M86x1-M68x1, M68x1-M54x0.75, M54x0.75-M54x0.75, M54x0.75-M48x0.75 (with M48x0.75 filter thread)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eDew Shield: Retractable\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eTotal length: 482mm\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eWeight of tube without tube ring and dovetail bar: 4.3kg\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eWeight tube incl. tube ring and dovetail bar: 5.6kg\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eGross weight incl. case and all accessories: 9.3kg\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eWhats included:\u003c\/em\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli style=\"font-style: italic;\"\u003e\n\u003cem\u003eTelescope\u003c\/em\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli style=\"font-style: italic;\"\u003e\n\u003cem\u003eStandard finder shoe\u003c\/em\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli style=\"font-style: italic;\"\u003e\n\u003cem\u003eTube ring\u003c\/em\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli style=\"font-style: italic;\"\u003e\n\u003cem\u003eDovetail plate (Vixen style)\u003c\/em\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli style=\"font-style: italic;\"\u003e\n\u003cem\u003eHandle\u003c\/em\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli style=\"font-style: italic;\"\u003e\n\u003cem\u003e4-piece photographical adapter\u003c\/em\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli style=\"font-style: italic;\"\u003e\n\u003cem\u003eWarranty card\u003c\/em\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli style=\"font-style: italic;\"\u003e\n\u003cem\u003eManual\u003c\/em\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli style=\"font-style: italic;\"\u003e\u003cem\u003eHard case\u003c\/em\u003e\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Askar Sharpstar","offers":[{"title":"Default Title","offer_id":55677016179023,"sku":"ASZ4","price":2778.36,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/1924\/6275\/files\/Sharpstar-Askar-Z4-APO-Refractor-Telescope.jpg?v=1754319692","url":"https:\/\/www.horizonastronomy.ie\/en-hr\/products\/sharpstar-z4","provider":"Horizon Astronomy • Telescope Center","version":"1.0","type":"link"}