REFRACTOR LENS ASSEMBLY- 6 INCH ED OBJECTIVE OPTICS-F/3 For Sale

This item has been shown 94 times.

REFRACTOR LENS ASSEMBLY- 6 INCH ED OBJECTIVE OPTICS-F/3:
$250

| GREAT PRODUCT! |Fantastic Refractor Lens Assembly - 155 mm (6.1 inches) Diameter
(5 Elements in 2 Assemblies) f/2.0 to f/3.25
Main Assembly contains an ED Lanthanum Element FULLY MULTI-COATED - Used but in excellent condition.
Make a dream refractor - 300 to 500 focal length and 260 mm long.
This came from a government camera lens costing thousands!Consider this a fairly easy telescope construction project.

Refractor Lens has two assemblies. One is a 155 mm air-spaced triplet lens with an ED Lanthanum element.
The second is a 85 mm corrector lens. All lenses fully multi-coated.

The 155 mm assembly makes a 190 mm focal length
(f/1.25) refractor by itself. This objective assembly
has 3air-spaced elements including an ED element.

The second assembly in this refractor optics gives a final system of 310 mm to 500 mm focal length
(f/2 to f/3.25)

Side view of refractor assemblies
These lens assemblies came from a government camera that cost thousands to produce. This will make a great, fast refractor at 6.1 inches (155 mm) and f/3.25 to f/2.0. All elements are fully multi-coated. One of the elements is an ED Lanthanum lens.There are only a VERY few of these available. As they say, when they are gone, they are gone. These elements are packed with care and sent to you with suggested spacing for several different focal ratios.The main lens element itself will make a f/1.25 scope. Use that for a real fast CCD camera element. It will cover all standard CCD chips. With the corrector, you get a high quality - and still a very fast - f/2.0 to f/3.25 refractor. These assemblies produce 300 to 500 mm focal length. Because of the corrector element, the total length of the refractor itself is only 250 mm long or a little longer.This is a fast lens system that will make a great deep-sky telescope and "rich field" scope. Would take fantastic deep-sky photos!
To construct this telescope you need to provide a tube and supports for the two assemblies. You also will need to support these assemblies in such a way that they can be aligned the first time. You need a refractor focus mount. The resulting job is much easier than grinding a mirror, but not a trivial job. A 6 inch refractor is usually difficult to mount, but the short tube length makes this fairly easy.Contrast in very important to bring out faint deep-sky features and fine detail. This refractor has advanced multi-coated optics and the ED element in the triplet.Shipping by mail on this item within the US is $15.95. We do not plan to ship these outside the United States. Email us about to discuss this if you wish.
We also have the a wide range of quality eyepieces currently on auction at eBay. We have a number of different Plossl eyepieces and 1.8X, 2X, and 3X Barlow lenses available at auction. Just click below to find all of our eBay auctions. View all our current eBay auctionsWe are currently selling hundreds of our great eyepieces, barlows, and other optics per month. Everyone has been very happy with them. Now you can choose from one or more of these at great prices. We have added a lot of new products and improved many of the older ones. These will be posted over the next few weeks. Now that we are importing these directly, we are passing along a great price because of our lower cost. Regardless of the brand, essentially all eyepieces sold by all manufacturers are now being made in China and Taiwan. The question is not why our prices are so inexpensive, it is why the major companies sell essentially the same product at a much higher price. Guess who is really paying for full-page ads in Astronomy Magazine and Sky and Telescope ?Check out our feedback. We have had a large number of positive feedback's for our eyepieces. You may email us or call our toll-free phone number if you have any questions: 1-888-OWL-WARE (1-888-695-9273). This phone is answered by a human from about 10:30 AM to 4 PM, Monday to Friday, Eastern time zone. Or send us email at: owl1@postoffice.ptd.net

NOTE TO BIDDERS:

If you have negative or hidden (private) feedback, do NOT bid. We reserve the right to require a cash-like payment if your account has very little or questionable history or if it is unconfirmed and/or unverified. We normally accept a number of payment methods including PayPal, VISA, MC, and Discover. Please make sure that your email SPAM filter allows us to send you email.