Dia. 52mm
Coated with FMC Blue Film
Focal Length 300mm
It can be used on DIY Astronomic Telescope Objective, DIY guidscope
Combined image quality: 1/4-1/8
Diameter tolerance: +0/-0.12 mm
Center thickness tolerance: ±0.2mm
Focal length tolerance: ±0.1%
Finish: 60/40
Eccentricity: 1'
Edge thickness 8.6mm, Center thickness 10.2mm
Package includes: 1 set Achromatic Doublet Convex Lens.
Return or Exchange
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If you are not satisfied when you receive your item, please return it within 14 days for a replacement or money back.
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Please contact me before you return it.
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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.
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If item is defective after 3 months, you can still send it back to us.
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We will send you a new one after receiving the defective item. But you have to pay the extra shipping fee.
Policies
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We are not responsible for any custom duty or import tax.
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We will leave POSITIVE FEEDBACK after receiving the payment.Please contact us if you are not satisfied with the item after receive it.
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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.
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Serious Buyer Only! Please place bid only if you agree with all the terms.
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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.
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We believe we can produce a positive outcome to any situation and will work hard to earn your praise.
Shipping
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We Ship to Worldwide. Please contact with us if didn't find your country.
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Items will be shipped within 1-10 business days on payment received.
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Delivery time depends on destination and other factors, it may takes up to 20 business days.