This telescope is inspected, measured and adjusted if necessary. The focuser will be optimized. On request from your telescope, you will receive a meaningful quality certificate (test protocol with star test, Ronchi, adjustment, with individual serial number)! Please specify when ordering!

Examples of our test protocols: Test records
How we adjust: About us

Please contact for advice on this telescope. So you can benefit from our experience before buying.

William Optics ZenithStar 103 Red AP 103/710 OTA apochromatic refractor

The ZenithStar 103 / f6.9 Apochromat with patented Bahtinov mask included: The ideal refractor for astrophotography!

This telescope not only looks great, it offers everything you need: extremely sharp imaging with clear details and a color correction that leaves nothing to be desired - and at an astonishingly low price!

Some feature:

f / 6.9 FPL53 doublet with air gap in a CNC-milled, very precisely fitting lens cell
The optional x0.8 flattener results in a fast aperture ratio of f / 5.5 with full illumination of a full-frame sensor: ideal for DSLR cameras!
2.5 ”R&P focuser with reduction. No adjustment even with long exposure times, high load capacity for heavy photographic equipment
Guide scope clamps already included
Extra long prism rail



The refractor is still quite compact with a short transport length.




Technical specifications:

optics

type refractor
Type Apochromat Dublet
Opening (mm) 103
Focal length (mm) 710
Opening ratio (f /) 6.9
Resolving power (arcseconds) 1.34
Limit size (mag) 11.9
Light collecting capacity (-fold a 7mm pupil) 220
Max. Sensible enlargement (-fold) 206
Tube weight (kg) 4.4
Transport length (mm) 615
Coating multiple
Full tube Tubuskonstruktion
Okularauszug

Type rack
Connection (eyepiece side) (inch) 2
Free opening (mm) 64
Reduction 1:10 fine drive
Connection thread (telescope side) M63
mount

type OTA
Mount type without mount
Included accessories

Viewfinder without
Miscellaneous Bahtinov focus mask
No carrying case
Dovetail Vixen Style
Pipe clamps Yes
Leitrohrschellen yes
Handle yes
Generally
Series ZenithStar
Red color
application areas

Astrophotography yes
Moon & planets yes
Nature observation no
Nebulae & galaxies yes
Sun no (only with a suitable sun filter)
Recommended for ...

beginners no
advanced yes
Observatories no