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Lumicon Low-Profile Focuser for 3.5 Inch Newtonian Base

|, JMI, Telescope Accessories, Focusers|Lumicon Low-Profile Focuser for 3.5 Inch Newtonian Base

Lumicon Low-Profile Focuser for 3.5 Inch Newtonian Base

$190.00

In Stock

Lumicon Low-Profile Focuser for 3.5 Inch Newtonian Base is a high-precision, pin-and-groove type helical 1.25″ focuser. The low-profile design quickly and easily converts your standard Newtonian with a 3.5″ base to a camera-ready telescope.

 

In Stock

SKU: LH2020 Categories: , , ,

Description

Lumicon Low-Profile Focuser for 3.5 Inch Newtonian Base

Lumicon Low-Profile Focuser for 3.5 Inch Newtonian Base is a high-precision, pin-and-groove type helical 1.25″ focuser. The low-profile design quickly and easily converts your standard Newtonian with a 3.5″ base to a camera-ready telescope.

For visual use, the smooth focusing brings out the very best in your telescope’s optics. Accessories that take up back-focus, such Lumicon’s popular 1.25″ Multiple Filter Selector, can be used with ease and convenience. The U-groove base aligns and sits flush on any telescope tube with a radius of 4.5″ or larger.  The draw-tube does not rotate.

Note: Visual use of the Low Profile Focuser requires either the Lumicon 1.25″ Multiple Filter Selector or a 1.25″ extension tube.

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Package Includes:

  • Low-Profile Focuser for 3.5″ Newtonian Base
  • Mounting Hardware

Product Specifications:

Focuser Minimum Height Above Tube* .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
Hole Pattern: Square; 2.75″ center-to-center
Min/Max Focuser Hole diameter: 1.5″/3.3″
Operating Range: to 20°F/- 7° C
Maximum recommended load: 3 lbs
Mounting Hardware: 8-32, Included

*Precise minimum depends on radius of tube.

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