Diameter 20mm Focal Length F25/30/40/60/80/100mm K9 Material Plano-convex Lens

Description

·Material: K9
·Center deviation: 3’
·Focus (f'): ±2%@587.6nm
·Aperture: 1~5
·Diameter tolerance (φ): +0.0/-0.20
·Local aperture: 0.2~0.5
·Center thickness (Tc): ± 0.1
·Surface: Grade IV
· Coating: None
·Light aperture: >90% φ
Material Diameter(mm) Curvature Focal Length(mm) Back intercept(mm) Center thickness(mm) Edge thickness(mm)
H-K9L 25.4 15.504 30 24.66 8.1 1.49
H-K9L 25.4 18.088 35 30.39 7 1.79
H-K9L 25.4 19.663 38.1 33.5 7 2.4
H-K9L 25.4 60.71 40 36.31 5.6 1.24
H-K9L 25.4 23.26 45 41.57 5.2 1.43
H-K9L 25.4 26.254 50.8 46.8 6 2.7
H-K9L 25.4 31.009 60 56.9 4.7 1.98
H-K9L 25.4 38.59 75 71.7 5 2.9
H-K9L 25.4 43.95 85 82.17 4.3 2.42
H-K9L 25.4 51.68 100 96.7 5 3.4
H-K9L 25.4 64.83 125 122.7 3.5 2.24
H-K9L 25.4 77.54 150 147.4 4 3
H-K9L 25.4 90.33 175 172.4 4 3.1
H-K9L 25.4 103.36 200 197.7 3.5 2.72
H-K9L 25.4 116.28 225 222.7 3.5 2.8
H-K9L 25.4 129.1 250 247.7 3.5 2.87
H-K9L 25.4 155.04 300 297.7 3.5 2.98
H-K9L 25.4 206.72 400 397.7 3.5 3.11
H-K9L 25.4 158.4 500 497.7 3.5 3.19
H-K9L 25.4 516.8 1000 997.7 3.5 3.34

Return or Exchange
  1. If you are not satisfied when you receive your item, please return it within 14 days for a replacement or money back.
  2. Please contact me before you return it.
  3. 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.
  4. If item is defective after 3 months, you can still send it back to us.
  5. We will send you a new one after receiving the defective item. But you have to pay the extra shipping fee.


Policies
  1. We are not responsible for any custom duty or import tax.
  2. We will leave POSITIVE FEEDBACK after receiving the payment.Please contact us if you are not satisfied with the item after receive it.
  3. 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.
  4. Serious Buyer Only! Please place bid only if you agree with all the terms.
  5. 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.
  6. We believe we can produce a positive outcome to any situation and will work hard to earn your praise.

Shipping
  1. We Ship to Worldwide. Please contact with us if didn't find your country.
  2. Items will be shipped within 1-10 business days on payment received.
  3. Delivery time depends on destination and other factors, it may takes up to 20 business days.

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