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Explore Scientific 92 Degree Argon 17mm LER Eyepiece

Explore Scientific 92 Degree Argon 17mm LER Eyepiece

Whilst many advanced observers may be getting rather used to the joys of super-wide apparent field eyepieces, we're sure that this is one of the sharpest, yet most comfortable and immersive eyepieces we've ever experienced - it really is a joy to use.

The 8 lens (arranged in 6 groups) design of this eyepiece yields superbly corrected views and the 22mm eye relief and wide occular diameter combine to deliver a fantastic user experience. The 17mm focal length will be a good fit for many different telescope designs and focal ratios. Those who have lower focal ratio instruments will adore the widefield deep sky views this eyepiece delivers. Whilst owners of 10, 12 and 14-inch SCT or RC telescopes, who are looking for higher power planetary and lunar magnifications will love what this eyepiece does for their particular instruments.

Explore Scientific's EMD coatings provide exceptional contrast and combat internal reflections extremely efficiently. The eyepiece has internal baffles and entirely blackened internal fittings which complement the EMD coatings.

The Explore Scientific 92° Argon 17mm LE Eyepiece is Argon purged and completely waterproof - so is impervious to dirt, moisture and fungal ingress.


Net weight (without access.) (g) 1100

Total length (mm) 148

Focal length (mm) 17

Field diaphragm (virtual, mm) 27.4

Apparent field of view (degrees) 92

Lenses/Groups 8/6

Eyepiece Barrel Diameter (mm) 50.8 (2-inch)

Length of the eyepiece barrel (mm) 39

Eyecups Rubber eyecups, foldable

Eye relief (mm) 22

Diameter (mm) 72

Our delivery charge for most of the UK is £3.95. All orders are shipped promptly, lower value items are sent Royal Mail 1st class and higher value or larger goods are shipped via reputable courier. All goods are shipped fully insured with FEDEX, UPS, DPD, DHL and Royal Mail, we do not use budget courier services, we can only ship to UK mainland addresses and are not able to ship to forwarding agents or PO boxes.

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We ship each business day, orders received before lunch are normally shipped that business day. We also direct ship from our UK suppliers, this means we have access to thousands of products that can ship fast to our customers.

Deliveries to UK mainland addresses are all shipped with fully insured premium services for £3.95, *some exceptions apply including many AB, FK, HS, IV, KA, KW, PA, PH, ZE postcodes. We will quote delivery charges to these areas where applicable prior to shipping (this does not normally affect lower value items shipped by Royal Mail).

You must inform us within one working day if the goods are lost or damaged in transit so that we can make a prompt claim against the delivery company and correct the problem. Please ensure all address details are accurate, we cannot be responsible for failed deliveries or losses arising from incorrect delivery addresses.

You agree that proof of delivery supplied by our delivery company is sufficient evidence to establish that goods have been received.

If your product is sent by Courier they will attempt delivery twice and a signature will be required. If they are unable to deliver because you are not available and after 5 days you have not contacted them to re-arrange. the goods will be returned to us and the return delivery costs may be charged to you

Explore Scientific 92 Degree Argon 17mm LER Eyepiece

MPN: 0219917

Price: 389.00

Including VAT and Warranty ✔

The Explore Scientific 92° Argon 17mm LER Eyepiece with a 2" barrel is the first in the line of Explore Scientific's 92° range of Argon-purged eyepieces. These eyepieces are designed to balance the modern demands of field sharpness over a wide apparent field, with long eye relief, which is of particular benefit to those who wear glasses while observing.

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