TS Optics 90mm achromatic Refractor ... Aperture 90mm / Focal Length 500mm / f/5.5
... very fast and compact refractor for observing and for photography - high contrast optics

The TSR905 is an achromatic refractor with a particularly nice design and workmanship. The objective has a higher quality than many other chinese systems of this aperture.

A True Travelscope:
Due to its short focal length and the retractable dewcap the TSR905 has a transporting length of only 41cm! The robust aluminium case provides safe storage and an ideal means for transportation. It even has space for accessories. As such the TSR905 is a perfect telescope for journeys and travelling!

Very Fast Optics for Imaging:
With its fast focal ratio of f/5.5 the TSR905 is ideal for astro imaging. It provides much shorter exposure times than most other achromatic refractors. Short exposure times are not only ideal for astro-imaging, but also a big benefit for nature photography under low-light conditions. In addition to the shorter exposure times you can also photograph larger fields of view.



Specifications:

2.5" Crayford Focuser:



The TSR905 uses a particularly high quality focuser. Its 2.5" drawtube is intentionally overdimensioned to avoid vignetting that would otherwise occur with a standard 2" focuser. Of course you can still use all standard accessories with 2" or 1.25". The accessories are securely held in place with a compression ring.

The focuser features a 360° rotation. This allows you to easily align the camera or eyepiece according to your needs.

A Flat Field for Imaging: Image Sharpness to the Edge:

This very fast ED Apo is particularly well suited for astro-imaging with its excellent focuser and the short exposure times. Like almost every refractor the TSR905 also has field curvature which should be corrected for photography. The optional TS field flattener provides perfectly shaped and focused stars throughout the entire large field of view.


Save over 150 Euros by buying the astrophotography package: Ask for your individual offer for the Achro 90/500 with TS Field Flattener and all adaptors needed for your setup ........................... Link to the 2" TS Flattener



We recommend the following accessories for this product:

-- Dovetail plate for mounts with Vixen-style quick release system .... PS Foto Del
-- Eyepieces and a 2" star diagonal mirror
-- Cleaning tools
-- Adaptor for prime focus photography

... and much more - please see the recommended accessories below!