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0.96″ H20 Huygens 20mm telescope eyepiece
0.96″ H20 Huygens 20mm telescope eyepieceClick images to enlargeDescription
We are delighted to offer for sale this 0.96″ diameter 20mm Huygens eyepiece.
We are frequently asked if we can supply eyepieces for older telescopes that have a 0.96″ focuser. While we have adapters that can let 1.25″ eyepieces be used the cost sometimes seems prohibitive compared to the value of the scope. So, we are supplying a range of 0.96″ diameter eyepieces purely to meet that need.
The eyepiece is supplied in a plastic storage container.
Huygens eyepieces consist of two plano-convex lenses with the plane sides towards the eye separated by an air gap. The lenses are called the eye lens and the field lens. The focal plane is located between the two lenses. It was invented by Christiaan Huygens in the late 1660s and was the first compound (multi-lens) eyepiece. Huygens discovered that two air spaced lenses can be used to make an eyepiece with zero transverse chromatic aberration.
These eyepieces work well with the very long focal length telescopes (in Huygens day they were used with single element long focal length non-achromatic refracting telescopes, including very long focal length aerial telescopes). This optical design is now considered obsolete since with today’s shorter focal length telescopes the eyepiece suffers from short eye relief, high image distortion, chromatic aberration, and a very narrow apparent field of view. Since these eyepieces are cheap to make they can often be found on inexpensive telescopes and microscopes.Because Huygens eyepieces do not contain cement to hold the lens elements, telescope users sometimes use these eyepieces in the role of “solar projection”, i.e. projecting an image of the Sun onto a screen. Other cemented eyepieces can be damaged by the intense, concentrated light of the Sun. (Wikipedia)Shipping costs will only be charged once if other eyepieces from this range are purchased – make sure you “Request Total from Seller” before paying (we will refund you if you accidently pay too much).”So yes, carry on telling people that such a small scope can be very good for a beginner great for looking at the moon, the phase of Venus, the rings of Saturn, the moons of Jupiter and the sun.
Good news on the eyepieces that you sent! I tried them out last night by looking at Saturn, and they worked very well. As I hoped, the 20mm was good for locating it very quickly to start with (the other advantage of a small, simple scope it is about 5 minutes from picking it up to looking at your target).
And I was also able to use the 4mm perfectly well too, even though at 150x it is above the 100x theoretical maximum for the telescope.
The image was understandably a bit dimmer but the slightly larger size was good to see.” Alan Dobie – client – June 2013
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Genuine UK StockWhy buy from us?
Have a look at our feedback and you will see the common theme is that we communicate well. Before a sale, during the processing of the transaction and after you have purchased an item you have access to a telephone number, email address and a fax number all connected to a human being who knows what you have been sold. We will do our utmost to make things as smooth as possible for you – especially if you are new to astronomy or to Ebay, we all had to start at sometime. There is no such thing as a silly question, please ask knowing that we will treat you courteously and respectfully as we hope you will want to come back to us if you choose to upgrade or buy some extras for your hobby.
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Skies Unlimited is the Ebay trading name of “Sky’s the Limit”. Feel free to email any questions through Ebay.PaymentPlease pay as soon as possible after the auction and we will get the items to you with minimum of delay. We usually get goods on the way within 24 hours (weekends excepted).Paypal is the quickest way to pay. We accept Postal Orders, Bank drafts and Building Society cheques and deal with them like cash so your goods are dispatched as soon as we have the payment.Please do not send cash through the post.Terms of SaleAll goods, unless otherwise stated, are brand new and in first class condition.Compliments may be made at any time.About UsSky’s the Limit have been trading on Ebay since 2004.
Our aim has always been to:Provide quality goods at the best price possibleTo treat our customers as we would only dream of being treated ourselvesWe work hard to maintain a 100% satisfaction rating and in order to achieve this, should anything not be quite as you expected it to be, all we ask is that you give us a chance to put it right. If something is faulty, we will put it right at our expense with all shipping costs refunded in full. You will not be out of pocket.If you change your mind or ordered the wrong thing you can return it within 30 days preferably with all packaging, inner and outer, for a refund. The cost of all shipping will be your responsibility.These are in addition to your statutory rights.Contact UsPlease feel free to contact us through Ebay messages.Pictures sell!
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Category: Cameras and Photography:Telescopes and Binoculars:Telescope Parts and Accessories:Eyepieces
Location: Welwyn Garden City