Vixen reducing sleeve 50.8–43 mm

Wide field eyepiece with 15x magnification and 16 mm field of view.The diopter setting is integrated.This eyepiece is compatible to follwoing microsocpes:BRESSER Science ETD-201 (No. 5806200)BRESSER Science TFM-201 (No. 5750800)BRESSER Sceince TFM-301 (No. 5750900)BRESSER Science Infinity (No. 5760700)SCOPE OF DELIVERY:1 piece 15x/16 wide field eyepiece

This set of 2 NATIONAL GEOGRAPHIC Walkie-talkies for children is a must-have piece of gear on any outdoor adventure. Share secret messages on spy missions or coordinate with each other when playing cops and robbers: the wireless walkie-talkies have a range of up to 6 km, allowing you to communicate at long distances when outdoors. You can also choose between 8 channels and adjust the volume so that no one can listen in on your conversations. The devices also have 10 different ringtones. If you want to keep your hands free while you're out discovering nature, you can attach the walkie-talkies to your trousers, backpack or jacket with the belt clips and use the headphone socket. There is also a practical hands-free function that switches the walkie-talkie on automatically when you talk. Lightweight and compact design Thanks to their compact size and lightweight design, the walkie-talkies for children are highly portable and easy to carry. The menu is intuitive and can be controlled via the 5 function buttons. For dark days, each walkie-talkie features a built-in torch that can be switched on at the touch of a button- perfect for sending morse codes and secret light signals! In addition, the display lights up in the dark so that you can keep in contact with your team during nighttime walks. Eco-friendly design: if you use rechargeable batteries (not included), you can charge them directly in the NATIONAL GEOGRAPHIC walkie-talkies. A micro-USB cable is included for this purpose. FEATURES Set of 2 walkie-talkies for children aged 14 and above Ultra-long range of up to 6 km (with no obstacles) Hands-free function (VOX) 8 narrow-band channels 10 different ringtones Headphone socket Adjustable volume Battery-operated (each device requires 3 AAA batteries) Practical belt clip Built-in torch Rechargeable batteries can be charged directly in the device DELIVERY CONTENT 2x Walkie-talkies for children  2x Belt clips Micro USB cable Instruction manual

This extension tube extends back focus depth to an additional 66 mm, for Vixen 60mm diameter focusers. It is suitable for extending compatible focuser drawtubes for use visually without a Star Diagonal but most commonly extends focus travel for astrophotography in a prime focus position, or for straight-through use with Barlow lenses and other accessories. FEATURES Compatibility: all Vixen OTAs with 60mm diameter drawtubes Weight: 115g SCOPE OF DELIVERY Extension tube 60 mm

Herschel-wedge / Solar-wedge for superior White-Light solar observing and imaging. For refractor-telescopes up to 150mm aperture, and with 2'' focuser. Complete system with installed ND3.0 filter.Herschel-Wedges will be used to observe the sun in White-Light. Around 95 % of the sun light will be suppressed by the Herschel Wedge. The remaining sun light will be dimmed by a fix installed ND3.0 grey filter. Lunt Solar Systems Herschel-wedges are installed in a fully closed housing with integrated heat trap. There is no stray light escaping, therefore it is very safe.The difference between Herschel-wedges and normal front mounted filters is, that the filtering takes place just before the eyepiece or camera. This will provide a better contrast and sharpness of the solar image.Furthermore, there is more safety at a Herschel-wedge than at a front mounted filter. A Herschel-wedge can not rip or become holes like a foil. And also it can not drop down from the telescope objective accidentally.Only for use with refractor telescopes up to 150mm aperture:Because the full energy and heat of the sun will be inside the telescope, we advise to use only refractors with a Herschel-wedge. The refractor must not have corrector lenses at the back. Optical elements like corrector lenses, or secondary mirrors of reflector telescopes, become very hot by the concentrated solar energy and could be damaged.Tuning the brightness:Because the Herschel-wedge produce polarized light, you can use a normal polarizing filter at the eyepiece or camera-adapter. By turning the polarizing filter the brightness will be reduced.Polarizing filter not included. We recommend the BRESSER 2'' polarizing filter 4946465.FEATURESFor refractor-telescopes up to 150mm apertureConnection to telescope: 2''Connection to eyepiece: 2''90° housing like star-diagonalEspecially high-quality optical surfaces for very good contrastFully closed housing with integrated heat trapNo stray light escaping - therefore it is very safeThe needed ND3.0 filter is fix installedSCOPE OF DELIVERYHerschel-wedge for 2'' focuserIntegrated ND3.0 filterHardcaseInstruction manual

Eyepiece adapter 42 mm to 50.8 mmFEATURES Adapts 42-mm T-threads for 50.8-mm eyepiece mounts Compatibility: Can be used on flip mirrors to mount 50.8-mm eyepieces Weight: 60 g

With the usage of barlow lenses, you can extend the equivalent focal length of telescopes and hence increase the magnification of your observed targets. Subsequently, you can use lower power eyepieces in Barlows to act as much more powerful eyepieces, but retain the larger ocular size and more comfortable viewing that comes with lower power eyepiece designs.Due to their two lens design, these Barlow lenses provide a brilliant image quality for the whole visual field and are suitable for observations and photography.  The black coloured Barlow element cell in this BRESSER Barlow Lens 2x 31.8mm/1.25," can be unscrewed and has the same thread as 1.25" filters, allowing it to be mounted in 1.25" eyepieces, t-adapters and other accessories, giving you flexibility of use and the ability to vary magnification in different accessories.  For instance, the black Barlow cell screwed into the average length nosepiece of a standard push fit t-adapter will give around 1.6x magnification on an attached DSLR.  This can be very useful when trying to get to photographic focus with some Newtonians and Solar Telescopes, which lack the necessary amount of in focus travel to get a camera to a prime focus position.FEATURESsuitable for observations and photographydoubling of the focal lengthtwo lens designfully multi-coatedWHAT'S INCLUDEDBarlow lens (1pc)