ISTAR OPTICAL produce an extensive range of exciting refractors in achromat and anastigmat formats - ultra high quality lenses  at down to earth prices.
Tube Assemblies - all prices subject to confirmation at time of order due to currency fluctuations
Availability - as all lenses and tube assemblies are produced on a small batch basis dependant on order ststus, lead time/delivery will vary. Please contact us for estimated delivery.
All ISTAR OTAs use aircraft grade magnesium alloy tubing, providing strong and very rigid support. The fully baffled tubes are powder coated for durability, and come with a lens cap. Dewshields now are retractable with a bayonet locking system.
The fully adjustable push-pull lens cells and other tube fittings are CNC machined from titanium magnesium alloy, with either a polished natural finish or anodised with colour dependant on product type.
ares wfx 150-5 r35_03
Note that all prices now include William Optics dual speed rack and pinion 2" focuser.
However, a choice of focusers is offered - Moonlite, Starlight Feather Touch, or Baader SteelTrack, all in 2inch fitting.
Finder units are optional extras, and we would recommend the Teleskop Services, APM range or brand of your choice. The Moonlight focuser comes with finder dovetails as standard, otherwise finders would be fitted directly to the main tube.

Anastigmatic lens options - Rx technology

This optical arrangement yields near ED performance but with the major benefits of lower lens weight and faster cool down time than triplets - and considerable cost savings.


05 perseus tcr 150-12         

The TCR Range 

 This novel, open frame design is currently unavailable.  

Achromats - Perseus Range

2 element Fraunhofer achromatic OTA

AXT - with sliding dewshield, WO zero shift dual speed 2" rack and pinion focuser, fast lock mounting rings, white textured finish  

                                               Prices from     


AXT150-8  150mm F8              1775
AXT150-10  150mm F10               1895




Anastigmatic Asteria Range 

Currently one model available:

WFX 150-5 R50, specification as for AXT range    Prices from £1955



Achromats - Phoenix Range

2 element achromatic comet hunters

WXT - same specification as AXT range

WXT 204-6 LT has optional WO 2.0" or 3.5" focuser , prices £3335/£3555 respectively


See the review by Neil English in December 2014 Sky at Night magazine of the WXT 204-6 LT
Specification :  204mm achromat, f5.9, 1220mm focal length.  Fully baffled OTA with retractable dewshield weighs 12 kilos.
Supplied with CNC tube rings and William Optics dual speed rack and pinion focuser as standard - any focuser may be specified at additional cost.
" ..the rich field obsever's dream ticket..."  " ...I trained the instrument on delta Cygni and was impressed to have glimpsed the companion."
" ... I was deeply impressed to fit the entire Pleiades cluster into the field of view!"   Neil's review is very complementary on all counts.
The WXT 204-6 LT is priced at £3225 with William Optics 2inch focuser and £3325 for the 3.5inch option.


Astrograph Range

New models under development



Please note that prices on Istar Optical US website are ex-works and do not include shipping, import duty or VAT. 
Our prices include 20% VAT.