Product description:
This is a 1.25-inch double-threaded focusing base with an adjustment stroke of 10 mm. It is lightweight and compact, made of all metal, and is strong and durable. During the focusing process, the CDD eyepiece or zenith mirror inserted does not rotate and only moves linearly, which is beneficial to observation and astronomical photography. The meticulous manufacturing process makes the micro-focusing extremely precise, and it remains smooth and smooth even at huge magnifications.

Technical Parameters:
1. Brand new double helix focuser
2. High-precision double helix focuser for guide mirror/finder mirror interface
3. Solutions to the slow focusing of telescopes or telephoto lenses
4. Made of all metal, durable
Inner diameter 1. 25"
Stroke 10mm
Adjustment accuracy 0. 05mm
Top external thread M42x0. 75,
Bottom interface 1.25 inches (31. 7mm) / 2 inches (50. 8mm) /M42*0. 75 external thread/M42*0. 75 internal thread
Thread/SCT external thread/SCT internal thread
Bottom inner ring external thread M31X0.5
Minimum height 46mm
Maximum height 56mm

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.