D150F750 Parabolic Newton Reflector Primary Mirror Objective, 35mm Secondary Mirror Self-Made Astronomical Glasses Accessory (D150F750 +35mm)

Description

• D150F750 Parabolic Newtonian Reflector Objective
• The Primary Mirror Is A Paraboloid, Glass Material,Aperture 150mm, Focal Length 750mm, High Accuracy 1/6-1/8,The thickness is approximately 18mm.
• The secondary lens is 35mm short axis lens.
• The lens surface is coated with aluminum film and protective film, which can protect the lens from scratch damage.
• With the main mirror center mark, it is very convenient to use optical calibration eyepiece or laser calibration eyepiece dimmer axis after installation, is a good choice for DIY homemade bovine paraboloid.
• Please select the main mirror, or complete accessories according to your needs

The primary mirror center mark is the core reference point of the dimming axis of the Newtonian reflector telescope, which is convenient for optical calibration of the eyepiece or laser calibration of the eyepiece dimming axis after lens installation.

Please select the main mirror, or secondary mirror, or complete accessories according to your needs

Mirror-related knowledge

The difference between spherical primary mirror and parabolic primary mirror:

Spherical mirrors inherently cannot converge the light from the edges and the center together. Therefore, in cases of large aperture and short focal ratio, it will result in loose imaging, blurred edges, and other issues.

In contrast, parabolic primary mirrors have inherent advantages. They can effectively correct aberrations, so for achieving good observation results, it is recommended to use parabolic mirror type.

Shipping and Returns

• We offer tracked shipping on all orders. Tracking information will be shared as soon as the order is dispatched.
• Please check the delivery estimate before adding a product to the cart. This is displayed for every product on the website.
• Available shipping methods and charges will be displayed at the time of checkout, depending on your exact location.
• All customers are entitled to a return window of 14 days, starting from the date of delivery of the product(s).
• Customers are advised to read our return policy for details of the return process, eligibility, refunds as well as cancellations or exchanges.
• In case of any issues or concerns about Shipping or Returns, please contact us and we will be happy to help.