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iAFS2 - iOptron 2" Inline Automatic Focuser
iAFS2 - iOptron 2" Inline Automatic Focuser
telescope adapter optional
  
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Price: $558.00
Introcutory Price $459.00
Savings: $99.00


Availability: Usually ships in 2 business days
Product Code: FA20

Description Technical Specs Support Documents
 
Introducing the most versatile inline auto focuser: the iOptron iAFSTM focuser with iLockTM technology! Utilizing a lead worm movement is the key to the iAFS focusers patented design; this method passively locks it at the exact position when movement is stopped, maintaining focus for most any sized payload even as the instrument angle is changed. The iAFS incorporates three movement control modes, USB (computer control), on board directional buttons (for powered manual adjustments) and a manual focus wheel to override the motorized adjustment. Other features include a built-in temperature sensor, dual USB-C ports, solid all metal body, fingerprint resistant surface, 0.6 micron resolution, and position limiters to prevent over runs. It comes standard with a 2 inch visual back, and optional telescope adapters to fit various OTAs are available. The iAFS focusers is available as the iAFS2 two inch model and the iAFS3 three inch version.

2" Visual Back Included
Telescope Adapter NOT included
Features
  • High precision stepper motor with position over-run protection
  • Built-in temperature sensor
  • Built-in CAA
  • Quiet, smooth, fast operation
  • Compact and lightweight
  • Zero backlash
  • Dual USB-C port for computer connection and firmware upgrade
  • ASCOM and INDI compatible
  • Low power consumption with USB2.0 (type-C) powering
  • Manual adjustment (powered or unpowered)
  • Position memorizing during power off
  • Compatible with most OTAs with proper adapter

Package includes:
  • 1X iAFS2 2" focuser
  • 1X 2" Visual Back (P-FA20-VA)
  • 2X USB2.0 (Type-C) cable

Optional Adapters
P-FA20-M0800
iAFS2 telescope adapter Askar/65PHQ and other M80X1
 P-FA20-M0835
iAFS2 telescope adapter Celestron/C11 and other M83.5X1.5
 P-FA20-M0900
iAFS2 telescope adapter GSO/RC6,RC8 and other M90X1
P-FA20-CA
iAFS2 camera adapter M48X0.75

Others are coming......

Average Rating: Average Rating: 4 of 5 4 of 5 Total Reviews: 1 Write a review »


  0 of 0 people found the following review helpful:
 
4 of 5 Grea in first use, backfocus high + short cables April 9, 2025
Reviewer: William Shaw from Chipping Norton, Oxfordshire United Kingdom  
An initial review having used it for 2 days including an imaging session:  needed a focus motor for a Cassegrain and as this had an optional M90 connection I decided to try it. Installation was easy mechanically and in software. Simple to set the zero position. Both NINA and Sharpcap linked to it via the ASCOM driver. Operation is smooth. So why not 5*? Well the supplied USB cabling is silly. Two USBA to C cables are provided. One is around 23cm long! The other is about 98cm and with my long scope it did not reach to my power box on my pier for all slew directions. If you have your power distribution on the scope it should be OK but I need to get a more suitable cable. The other potential issue is backfocus take-up. With the adapter it is about 130mm long to the clamp. This was fine for me  but check you have the room. I had room for a flip mirror and that then had the focuser extended by a few mm. Also great you do not have to fight your way past yet another integrated environment.

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