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Explore Scientific 208mm f/3.9 Photo Newtonian - Hex-Focus


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Explore Scientific 208mm f/3.9 Photo Newtonian - Hex-Focus

Photographic Newtonian f/3.9 with 2.5" Hexafoc Focuser
Aperture: 208mm; Focal Length: 812mm f/3.9
Ideal imaging partner: the Explore Scientific HR Coma Corrector
What's in the box: OTA + Finder + Tuberings + SPL26mm
Large 85mm secondary and 2.5" focuser offers a perfect field illumination, even for large camera sensors
2.5" Hexafoc focuser upgradable to a 10:1 reduction
Universal 44mm Dovetail plate with stainless steel rail (fits Vixen/Skywatcher/LXD75/Great Polaris/EQ5)
Elaborate 6 point flotation system for mirror support
Easy to collimate secondary with large hand-turnable knurled adjustment bolts
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Explore Scientific 208mm f/3.9 Photo Newtonian - Hex-Focus

In the past few years the Explore Scientific Photo Newtonians have become the standard workhorse for Deep Sky astrophotography. We now proudly present the second generation of this telescope, the Explore Scientific Photo Newtonian Mark II Hexafoc. The Explore Scientific 208mm f/3.9 Photo Newtonian - Hex-Focus will deliver you deeper images (with the same equivalent exposure time) - when compared to competing 8" f/4 systems - due to its oversized primary mirror and slightly faster optical system. The big 85 mm secondary mirror prevents vignetting for optimal illumination. The excellent 2.5" Hexafoc does not cause vignetting, even with larger format cameras, due to its large diameter and makes focusing a joy - the smoothness and shift-free operation sets new standards in this price class. A laser-engraved scale on the focuser's drawtube makes repeatable focusing easy and focuser can be easily upgraded with the Bresser Messier 10:1 dual speed reduction gear set (0625720) for even finer focus control. The inclusion of this groundbreaking focuser, tube rings with a 44mm universal standard dovetail and camera mounting feature and a high-end finderscope with illumination will satisfy the most demanding of astronomers and astrophotographers. The PN208 Mark II Hexafoc has a classical tube construction with a strong, yet lightweight, aluminium tube - though the even lighter Carbon Fibre version of this scope is also available for those who need an even lighter option.


Tube without accessories: 8.74 kg - Tube with all accessories mounted: 11.5 kg
Aperture 208 mm
Focal length 812 mm
Focal ratio f/3.9
Diffraction limited optics with parabolic main mirror

What's in the box:

Aluminium tube with optics
Tube rings with handle and camera mounting feature
8x50 Finderscope with illuminated recticle and true oriented view
26mmm Super Plössl
Additional technical data
Backfocus fully inward focused: 60mm
85mm Secondary mirror for better focal plane illumination

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