130mm Parabolic Primary Mirror DIY Newtonian Reflection Telescope Focal 520mm For Sale
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130mm Parabolic Primary Mirror DIY Newtonian Reflection Telescope Focal 520mm:
$235.22
ParabolicMirror Newtonian reflection astronomical telescope Dai.130 F520
Specification
Caliber: 130mm,
Focal length: 520mm
Primary mirror, aluminum plating and protective film
The parabolic surface accuracy PV is guaranteed to be better than 1/10 of the wavelength of the light wave,
and the spherical aberration is less than 1/15 of the wavelength.
The lens blank is made of K9, with a diameter of 130mm,
This high-precision parabolic mirror has been recognized by many astronomy enthusiasts, scientific research institutes, and optical manufacturers.
With 84% aluminum film and silicon dioxide protective film, the film can be used for 8-10 years under moisture-proof storage.
Return or Exchange
- If you are not satisfied when you receive your item, please return it within 14 days for a replacement or money back.
- Please contact me before you return it.
- If item is defective in 3 months, We will send you a replacement without extra charger, or offer refund after we receive the defective item.
- If item is defective after 3 months, you can still send it back to us.
- We will send you a new one after receiving the defective item. But you have to pay the extra shipping fee.
Policies
- We are not responsible for any custom duty or import tax.
- We will leave POSITIVE FEEDBACK after receiving the payment.Please contact us if you are not satisfied with the item after receive it.
- All messages will be answered within 1 business day. If you do not receive our reply, please kindly re-sent your message and we will reply to you as soon as possible.
- Serious Buyer Only! Please place bid only if you agree with all the terms.
- If you have any problems or concerns whatever with your order or products,please message us and give us a chance to assist you before you leave any feedback.
- We believe we can produce a positive outcome to any situation and will work hard to earn your praise.
Shipping
- We Ship to Worldwide. Please contact with us if didn't find your country.
- Items will be shipped within 1-10 business days on payment received.
- Delivery time depends on destination and other factors, it may takes up to 20 business days.
