7,500+ items available from stock
🎄 Right of return up to 31.01.2023
Your partner for astronomy
Telescope accessories > Focusers > Focusers > Lumicon > Lumicon Low-Profile 1.25in Focuser for Newtonian on 3.5in Base with 2.75 inch hole pattern
Product no.: 20320

Low-Profile 1.25in Focuser for Newtonian on 3.5in Base with 2.75 inch hole pattern

$ 363.00 incl. VAT, plus shipping costs
too expensive?
short-term
Product can be shipped as of 15.12.2022 + lead time

Delivery possible before Christmas,
when your order by 16.12.!
Right of return up to January 31 2023!


Product description

In the case that this article currently is not available from the warehouse, please note the following: we order from this supplier in regular intervals. Please place your order now, so that we may take into account your order and deliver the article to you by the above-mentioned date.

The Low Profile 1.25" Focuser for Newtonian, 3.5" Base, is a high-precision, pin-and-groove type helical focuser. The 3.5" base provides for replacing larger focusers with a center-to-center hole-spacing of 2.75". The draw-tube does not rotate.
Accessories that take up back-focus, such Lumicon's popular 1.25" Multiple Filter Selector, can be used with ease and convenience. The high-precision, smooth focusing brings out the very best in your telescope's optics. The low-profile design quickly and easily converts your standard Newtonian to a camera-ready telescope. The U-groove base aligns and sits flush on any telescope tube with a radius of 4.5" or larger.

Specifications:

  • Focuser Minimum Height Above Tube*
  • 1.75" (for 4.5" radius tube)
  • 2" (for flat-base mounting)
  • Turns ratio: 2 per inch
  • Travel: 1"
  • Resolution/Backlash: < 0.0005"
  • Image shift: Negligible
  • Reverse action: Negligible
  • "Stiction:" Negligible
  • Footprint: 3.5" square
  • Mounting hole pattern: Square; 2.75" center-to-center
  • Min/Max focuser hole diameter: 1.5"/3.3"
  • Operating range: to 20&degF/- 7° C
  • Maximum recommended load: 3 lb.
  • Mounting Hardware: 8-32, included

    *Precise minimum depends on radius of tube.

Specifications

Capacity


Appropriate for...
Newtonian telescopes

General


Type
Focuser
Type of build
Helical
Lumicon Low-Profile 1.25in Focuser for Newtonian on 3.5in Base with 2.75 inch hole pattern

Customer reviews

There are no customer reviews for this product yet.

Compose your own review

Do you have specific questions about your order or products? Please contact our customer service!