40mm Orion Sirius Plossl Telescope Eyepiece
by Orion

Our Price: $51.99
Availability: Usually ships in 1-2 business days
Category: Digital Camera
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Digital Photo Product Details

• The 40mm Sirius Plossl 1.25" eyepiece is ideal for all types of telescopes: reflector, refractor, and catadioptric
• Eyepiece offers a 43 degrees apparent field of view for clear, sharp images of impressively high contrast
• Fully coated optics with magnesium fluoride on every air-to-glass surface
• Superb 40mm focal length eyepiece excels at wide-field surveying and detailed observations of large diffuse subjects
• Threaded for use with all Orion 1.25" eyepiece filters

• Orion LensPen Mini Pro Cleaning Tool

Digital Cameras Photo Reviews of 40mm Orion Sirius Plossl Telescope Eyepiece

Customer Review: Get the 32mm instead...
Summary: 3 Stars

Most people get eyepieces in this focal length to get the widest possible field of view with a 1.25" barrel eyepiece - yet a 40mm Plossl witha 43 degree apparent field of view shows no more sky than a 32mm Plossl with a 52 degree apparent field of view! (In my scope, they both show about 1.35 degrees of actual sky). But the 32mm will have a wider apparent field of view and somewhat higher magnification. There's really no reason to buy the 40mm Plossl.

But I did, a while back. Now I've learned. This eyepeice is actually of decent quality, although there is some minor astigmatism of the image towards the edge when I used it with my 6inch f/8 telescope (not seen in the shorter focal length Sirius Plossls). All the Sirius Plossls are good values, but get the 32mm version instead.

Description of 40mm Orion Sirius Plossl Telescope Eyepiece

Eyepieces

• Camera & Photo > Accessories > Telescope Accessories > Eyepieces