William Optics
William Optics SWAN 40mm 2" Eyepiece
William Optics SWAN 40mm 2" Eyepiece
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SWAN: a huge-lens rich-field eyepiece at a very reasonable price!
Fully multicoated advanced design for breathtaking and jaw-dropping 72 deg. F.O.V. views.
Try it out on the Milky Way!
A True Spacewalker!
• Marvelous super-wide field of view: 72 deg. F.O.V.
• Fully Multicoated lenses for excellent transmittance.
• Outstanding chromatic aberration correction.
• Sharp and well contrasted.
Great Contrast
• Internally fully blackened (lens edges and internal spacers).
• No flaring or ghosting on high-contrast objects.
• Parfocal.
Ease of Use
• Soft rubber eyecup.
• Extremely long eye-relief: 28 mm.
• No internal reflections.
Terrific Fit and Finish
• High-resistance anodized black barrel.
• Smooth design for no hook up in your focuser.
• Threaded for 2” filters.
- Focal Length
- 40mm
- Barrel Size
- 2" (50.8mm)
- Field of View
- 72°
- Eye Relief
- 28mm
- Filter Threads
- Standard 2" Filter Thread (M48 x 0.75)
- Coatings
- Fully Multi-Coated
- Lens Type
- 5 Elements / 3 Groups
- Total Length
- 131 mm
- Weight
- 570 g
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Delivered within 4 weeks.
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Research It
Find the product you want.
Talk to Us
Get expert guidance fast.
We Source It
Delivered within 4 weeks.
Enjoy It
Be happy with your gear.
Got a question?
what we get asked most often
Are the prices all-inclusive?
Yes. The price you see is the price you'll pay. All taxes are included. Free shipping on all orders.
What's the stock status of the products on your site?
We list only in-stock items on our website that can be shipped right away. Sold out products are out of stock, so you can't place an order.
Selected products are available for Preorder, with a guaranteed delivery within 30 days or your money back.
How fast do you ship?
We process and ship all orders within two business days. Shipping time is determined by the speed of the shipping partner.
Is there a guarantee on your products?
Yes. On top of the manufacturer's warranty, we also offer a Replacement Guarantee on all online orders. In the event that the product is defective or damaged during shipping, you will receive a replacement.
Can I cancel my order?
We'll refund you 90% if you cancel before dispatch. Cancellations after dispatch are complicated. Take a look at the our Policy here
What's your return policy?
We have strict return/refund policies as a company that deals with fragile products. Casual returns are not permitted. Items that are not damaged in transit or defective cannot be returned.So please take a moment to review our Refund Policy.
Could I order something that's out of stock or not listed?
If you are interested in ordering an out-of-stock item, click the "notify me" button. You will be notified when the item is back in stock.
To source a specific product for you, our team needs more information. Specific orders will be subject to case-by-case terms and conditions.
