Glass surfaces such as telescope lenses pointing to the clear sky are prone to having dew forming on the lens during the night - especially if its humid. They also tend to capture stray light, which reduces the contrast of the target.
As many astronomers and astrophotographers have experienced, on clear nights, dew is often a real problem and if it forms on your lens it can render your nights observing session over. After only a very short time, the optics can start fogging, making viewing or photography impossible. A good dew shield reduces the risk of fogging and extends the observing time. Note: on extremely humid nights, dew heaters will also be required. Dew shields are not required for Newtonian reflectors.
Lateral stray light from street lights can also enter the lens which reduces contrast and often cause unwanted reflections in photographs. These dew shields are also blackened out inside with non reflective felt, to help prevent stray light from entering the telescope.
These dew shields are available in various diameters
The velcro fasteners are sewn and cannot detach. The dew shields themselves are made from weather-proof and non-ageing plastic.
These dew shields are extra flexible, the retentive area for the Velcro is much broader than the from many other designs. This offers a larger retentive area and also a better adaption to the diameter of your telescope.
Once attached to the tube, they hold very well. The contact surfaces to the tube are coated with a non-slip foam rubber.
They can be combined with dew heaters on extremely humid nights.
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.
If your country is not listed below please contact us for more information.
Standard EU Delivery Regions: Germany, France, Belgium, Poland, Luxumbourg, Netherlands, Sweden, Denmark, Portugal, Spain, Austria, Italy, Poland, Czech Republic, Croatia, Malta, Greece
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.
* Customs / Import duties may apply in these regions. For more information please contact your local tax/customs office.
IMPORTANT: Its essential that when placing an order, you include a valid 'Contact Telephone Number' for the delivery address or for the person receiving the item. This is necessary to avoid potential delays or problems with your delivery.
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.