Explore Scientific (8 x 50) Guide Scope / Finder Scope with Helical Focuser
This universal 50mm Guide Scope & Finder Scope has a focal length of 220mm and although initialy designed for the Explore Scientific range, its also suitable for use on a wide range of other telescopes.
This excellent 8x50 Finder Scope has a detachable eyepiece unit and crosshairs with adjustable red illumination for ease of use in the dark. The very precise helical focuser has many connection possibilities such as a 1.25" / 31.7mm plug-in connector, as well as the T2 camera connection thread (M42x0.75mm) to enable the autoguiding camera required for long exposure astrophotography. It can even be used as a small mini travel telescope.
The scope viewfinder also has a very large field of view (FOV) of 6.96 degrees, making it much easier to search for and target objects. The existing scale markers (division =1 degree) of the crosshairs are a good reference for estimating distances and the open center marking also facilitates the precise centering of objects. All the lens surfaces have a multi-coating and guarantee a bright viewfinder image due to the high light transmission values. The adjustable red LED lighting is powered by two LR41 button cells. The main lens and crosshairs can be focused independently, giving you perfect focus for your eyes.
Compact tracking unit for Auto-guiding: One of the main applications for this telescope is auto-guiding. For this purpose, the Guide Scope is inserted into the existing scope shoe of the primary optics and aligned in parallel. If the existing scope shoe is not compatible, a second shoe is also included. A tracking camera can be mounted with the 1.25 inch/31.7mm plug-in connector at the rear of the scope or via T2 threaded connection (M42x0.75mm) - Please note the required back focus for your tracking camera. The focus plane (or back focus) is about 22mm behind the T2 thread. The precision focuser allows you to focus sharply onto the guide star and for easy repetition of the focus point, the focus tube has a white millimeter scale of 0 to 28mm laserd on top.
Use as a mini travel telescope: This Finder / Guide Scope can also be easily used as a mini travel telescope. A magnification of x 8 to x 40 can be achieved with optionally available eyepieces. Almost all eyepieces with an eyepiece focal length of 5 to 26mm and 1.25 inch/31.7mm plug-in connection type are suitable.
Metal viewfinder holder and viewfinder shoe: The base holder of the viewfinder and guide telescope is made entirely of aluminum and forms a stable base. If the existing viewfinder shoe is not compatible, a suitable viewfinder shoe which is included can be attached to the OTA using 4 x M5 screws. The bore distances of the viewfinder shoe on the longitudinal and transverse axis are 31.7mm. All the adjustment and clamping screws have plastic tips that effectively prevent scratching of the viewfinder housing and the viewfinder holder.
8 x 50 Finder / Guide Scope
Can also be used as a mini travel telescope
Perfect image sharpness
FMC Multi-coated Lens Surfaces
Lens focal length: 220mm
Maximum permissible camera weight: 550g
Removable eyepiece/crosshair unit
Camera connection via 1.25 inch / 31.7mm plug-in connector or T2 thread
T2 thread: M42 x 0.75mm
Precise helical focuser for focusing the field of view
Setting distance of the helical focuser: 28mm
Close focusing limit: 3m
Laser-engraved millimeter scale from 0 to 28mm on the focuser
Sharpness plane (back focus) is approx. 22mm behind the T2 thread
Separate focus of the crosshairs on the eyepiece
Very large field of view FOV of 6.96 degrees
With adjustable red crosshair lighting
Scale markings of the crosshairs with 1.0 degree pitch
Power supply: Two LR41 button cells
Ring clamping made of brass and 3 clamping screws on the 1.25 inch plug-in connection
With optional eyepieces, magnifications from 8x to 40x can be achieved
Almost all eyepieces with 1.25 inch / 31.7mm plug-in connection are suitable
Holder of the viewfinder telescope is made entirely of aluminum
Viewfinder mount with 6 large adjustment screws with non-slip ring
Weight & Dimensions:
Total length: 250 mm
Total width: 140 mm
Total height: 80 mm
Total net weight (incl. accessories): 800g
8 x 50 Finder / Guide Scope
Eyepiece unit with crosshairs - Crosshair lighting incl. batteries
Viewfinder holder with viewfinder shoe
Please Note: Items in stock and ready for dispatch immediately are usually delivered within 24-48hrs. Some items may be 'Special Order Items' and require additional lead time before being dispatched eg. 5 - 10 Working days - This will be highlighted on the product page before purchase.
All orders are shipped using our reputable courier partners to ensure your items arrive safely and promptly. While we do offer International Delivery, we are unable to ship large Telescopes and Mounts outside of Ireland.
REPUBLIC OF IRELAND
Est. Delivery Time after Dispatch: 24 - 48 hrs
Standard Express Shipping: Ireland Nationwide: from €9.95
Note: Larger telescopes which contain multiple boxes include an additional surcharge. Shipping is calculated automatically at the checkout.
- CLICK & COLLECT -
You can also avail of our FREE 'Click & Collect' service at the checkout, where you can order online and collect from our head office. Depending on the items and availability, these can be ready for collection within a few hours. "NOTE: Please wait until we let you know your order is ready before you arrive, to arrange a suitable time for collection."
Est. Delivery Time after Dispatch: 24 - 48 hrs
Standard Express Shipping: Norther Ireland: from €19.50+
Standard Express Shipping rate applies up to a max order weight of 30kg Nationwide. - Large heavy items from 30kg+ include an additional surcharge, depending on the overall weight.
Unfortunately due to Brexit we are currently unable to ship to Mainland UK at this time.
Est. Delivery Time after Dispatch: 24 - 72 hrs
Standard Express Shipping: European Union: from €18.95+
Shipping available for items upto a max order total weight or volumetric weight of 27kg.
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US & CANADA
Est. Delivery Time after Dispatch: 48 - 72 hrs
Standard Express Shipping: US & Canada: from €28.50+
Shipping service available for items upto a max order total weight or volumetric weight of 20kg.
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Please Note: Delivery times listed above are estimated. These are calculated from when your order is Completed & Dispatched (not from when the order is placed) and times may also vary for some remote post codes. Delivery service takes place Mon-Fri (excl. Bank/Public Holidays).
Shipping Disclaimer: All of our parcels are sent via a 3rd party registered courier service to ensure safe and prompt delivery. While we endeavor to ensure that all parcels are delivered within the specified time frame, 'Horizon Astronomy' can not be held responsible for delays due to adverse weather conditions or other courier/technical related issues outside of our control.