Refractors

Dieser hochwertige Sextuplet SD Glas Petzvalastrograph ist sehr gut für die Astrofotografie größerer Areale geeignet.

• Öffnung 60 mm
• Brennweite 276 mm
• Öffnungsverhältnis 1:4,6
• Zwei SD-Elemente für sehr gute chromatische Korrektur
• 6-Element-Petzval-Konstruktion für Bildfeldkorrektur bis zum Vollbildformat
• Anschlussgewinde M48x0,75 mit ausreichendem Backfokus
• Geeignet für DSLR, spiegellose Systemkameras und Astrokameras
• 360°-Rotator für die Kamera
• Auszug mit Untersetzung für präzise Fokussierung (Astrofotografie)
• Zwei Sucherschuhe

The Esprit-150EDX from Skywatcher offers the highest optical and mechanical quality and is optimized for astrophotography.

• Aperture 150 mm
• Focal length 1050 mm (focal ratio f/7)
• Triplet apo objective with FPL53 ED element
• Improved 3" dual-speed focuser for high payload
• 360° rotation
• 2" connection with additional thread for screw adaptations
• Retractable dew shield
• Carrying handle, Losmandy style dovetail bar, carrying case

Takahashi Extension Tube (FL), Short Distance Ring

• Connection (object side): M56x0,75(neg)
• Connection (observer side): M56x0,75(pos)
• lightpass: 17,5mm
• Shipping weight:  1kg

Key Features:

F/3.2 Ultra-Fast Optics
Captures deep-sky objects with unparalleled efficiency, utilizing the fastest optical system in William Optics history to maximize photon collection and shorten exposure tracks.

Advanced 7-Element Petzval Design
Provides a naturally flat image field without requiring an additional field flattener, delivering sharp stars and clean detail across a wide imaging area.

43.2mm Full-Frame Image Circle
Supports full-frame, APS-C, and M4/3 camera systems, giving astrophotographers total freedom for wide-field composition and high-resolution deep-sky imaging.

WIFD (William Optics Internal Focuser Design)
The patented internal focusing system keeps the focusing mechanism centered inside the telescope, improving balance and helping avoid rear drawtube-related flexure or vignetting.

Sensor Tilt Xterminator (STX-R)
Features a heavy-duty rear tilt and rotation interface designed to support modern imaging setups, reducing the chance of rear-end sag while retaining convenient sensor-squaring capability.

Anti-Shrink Lens Cell Technology
Helps maintain stable optical alignment under changing temperatures by minimizing the effects of material expansion and contraction around the lens cell.

Built-In Patented Bahtinov Mask
Integrated into the front cap for quick and accurate focusing, making precise star focus easier in the field.

Patented Handle Bar Design
Improves handling, portability, and accessory mounting while maintaining the clean mechanical layout of the Mighty Cat platform.

Quadruplet flat-field astrograph with a 111 mm aperture for observation and astrophotography

• Aperture 131 mm / Focal length 983 mm / Focal ratio f/7.5
• Quadruplet design with field corrector built into the tube
• Triplet objective with excellent chromatic correction thanks to an ED element, single element field corrector
• Illumination and field correction up to full-frame
• Retractable dew shield for easier transport
• 360° rotation for proper camera orientation
• 3" R&P focuser with M78, M54, M48 photo threads and 2" connection
• Connection option for 2" filters available
• Two finder shoes - 1 for a finder scope, 1 for a guide scope
• Including complete optics test by Teleskop-Service on the optical bench (autocollimation) - star image extrafocal, intrafocal and focal as well as Ronchi test and protocol - so you will get a 100% tested telescope.

• Connection: M56x0.75
• Extension factor: 1.04x
• Number of lenses: 2

Quadruplet flat-field astrograph with a 111 mm aperture for observation and astrophotography

• Aperture 111 mm / Focal length 766 mm / Focal ratio f/6.9
• Quadruplet design with field corrector built into the tube
• Triplet objective with excellent chromatic correction thanks to an ED element, single element field corrector
• Illumination and field correction up to full-frame
• Retractable dew shield for easier transport
• 360° rotation for proper camera orientation
• 3" R&P focuser with M78, M54, M48 photo threads and 2" connection
• Connection option for 2" filters available
• Two finder shoes - 1 for a finder scope, 1 for a guide scope
• Including complete optics test by Teleskop-Service on the optical bench (autocollimation) - star image extrafocal, intrafo

The compact FS-60CB Apo can be upgraded to a 60/600 f/10 quadruplet Apo with this 1.7x Q module. Optically, this version is superior to the FS-60CB ... 

• Extension factor: 1.7x
• Number of lenses: 2

The Askar 80ED with 80 mm aperture and 560 mm focal length offers good color correction and is ideal for mobile use.Aperture 80 mm / focal length 560 mm / focal ratio f/7

• Improved color correction due to the use of ED glass
• High-quality dual-speed R&P 2" focuser - optimized for astrophotography
• Motorized focus systems, like ZWO-EAF can be adapted directly
• M58x1 external thread on the focuser for screw adaptations
• Correctors for astrophotography calculated for the ED available (0.7x, 0.85x and 1.0x)
• With a weight of only 2 kg and a transport length of 40 cm, ideal for traveling
• 2 finder shoes, CNC rings, dovetail bar, carrying handle included in the scope of delivery

This extender is suitable for the Takahashi fluorite apochromats FS-60CB, FS-60Q, FC-76D (both versions), FC-76Q, and FC-100D (all versions). However, it is also compatible with the older Sky-90 and FSQ-106 fluorite models, which are no longer manufactured. Of course, it can also be used with many other devices as a moderate focal length extension.

•  Connection: M43x0.75(pos)
• Extension factor: 1.6x
• Number of lenses: 5