Products description
TS eyepiece Expanse 17 mm wide-angle eyepiece 1.25 "and 2" 70 °
TS eyepiece Expanse 17 mm wide-angle eyepiece 1.25 and 2-inch connection
The TS EXPANSE 17 mm wide-angle eyepiece has a 70 ° field of view and offers a very pleasant view behavior and very good sharpness. The eyepiece can also be used very well for eyepiece projection. With the eyepiece you can achieve maximum magnification with bright telescopes.
♦ focal length 17 mm
♦ 70 ° apparent field of view - ideal for the human eye
♦ Perfect sharpness in the entire field of vision thanks to 8 lenses in 5 groups
♦ Also ideal for bright telescopes
♦ Comfortable eye relief with 20 mm - also very suitable for people who wear glasses
♦ Quiet insight behavior - no "kidney bean" effect - the image field remains clearly visible
♦ Very good multi-coating for a bright, clear and high-contrast image
♦ Can also be used for binocular observation (from 56 mm eye relief)
♦ Flexible connection to your telescope: 1.25 ", 2" and M48x0.75 external thread
♦ The Expanse eyepieces are homofocal with each other. You can change the eyepieces without having to adjust the focus.
Expanse eyepieces from Teleskop Service offer a very good imaging performance at a very good price. The eyepieces also impress with their very pleasant viewing behavior. Even inexperienced observers can immediately see the large field of view of 70 °. The calm view enables you to concentrate fully on the object.
Important information for observation:
♦ The 70 ° field of view has proven to be optimal for observation. Larger fields of vision are not fully exploited, the more troubled view means that information is lost.
♦ The Expanse eyepieces can be used on all common telescopes. Bright Newtonian telescopes from f / 4 or large field refractor telescopes can also be well equipped with the Expanse eyepieces.
♦ The Expanse eyepieces offer a particularly good multi-coating on every glass-air surface. The image is reflection-free, high-contrast and bright. They can therefore also be used very well for the moon and planets.
♦ Suitable for binoculars - star lovers who like to observe with both eyes use a binocular approach. The Expanse eyepieces can be combined well with these approaches.
♦ 1.25 "and 2" plug-in diameters - Many telescopes are already equipped with 2 "eyepieces. You can use the 2" plug-in sleeve directly. If you unscrew the sleeve, you get the 1.25 "insertion diameter for smaller telescopes.
Photographic properties of the Expanse eyepieces:
The Expanse eyepieces are very well suited for eyepiece projection and allow moon and planetary images to be taken at a high level.
Unscrew the eyecup and you get an M43x0.75 external thread. With the optional T2 adapter (Hyp-T2) you can screw DSLR cameras or digital cameras directly to the eyepiece. Optimized distances and large lens diameters give you very good sharpness and good illumination.
♦ Large lens diameter and long eye relief allow good illumination
♦ Trouble-free connection to the T2 system and therefore every possibility of adaptation
♦ very good sharpness on the axis and in the field
♦ Good connection options also to spotting scopes via the M48x0.75 thread
Focal length: 17 mm
Field of view: 70 °
Eye relief: 20 mm - eye relief adjustable for glasses wearers
Telescope connection: 1.25 "and 2"
Camera connection: Via M43 thread - T2 adapter is optionally available
Weight: 450 grams
Length: 110 mm
♦ eyepiece
♦ Dust caps