Thank you for visiting the web site of ISTAR Optical - your manufacturer of superb quality refractors and accessories
at down to earth prices. We are working hard to add new products to our existing line. Please check back frequently for updates to
our web site. Our plan is to design and manufacture the widest selection of objective lens based optical systems ever offered by a
single company. From inexpensive medium diameter achromatic doublets to large Fluorite and ED glass APOs, Super APO and multi-element
Astrographs.
We are currently designing several new products. Four versions of our famous Asteria R30 Anastigmatic doublets in several configurations including a 127mm F/8, 150mm F/8, 150mm F/10 and 180mm F/8. This design offers a 30 percent reduction in chromatic aberration and substantially smaller lens spot size. In addition to our flagship Phantom CFT 152-8, we are developing a new line
of CaF2 pure Fluorite scopes that includes a Super APO in 180mm F/6. This lens utilizes a CaF2 Fluorite element and a rare earth ED
glass element. This combination offers unsurpassed optical performance in astrophotography. Super APO Triplets will include a 140mm
F/7.5, 160mm F/7.5 and 180mm F/7.5. Finally, our Raycorr Pro 6 Chromatic Aberration Reducers will be introduced this year.
As of December 2011 we implemented two major improvements to our production. Each ISTAR lens is now produced with a super flat black
edge masking that eliminates unwanted inner objective glass reflections while improving on resolution. Also, each lens is supplied
with an engraved Serial Number that links it a set of test reports.
ISTAR does not produce in mass quantities. Each telescope and optical system is custom designed in house by our master optician Zdenek,
assembled by hand and individually tested. Unlike our competitors, we run two separate lens tests on each OTA that includes a computer
Interferometer report and a complete visual report performed under the stars by Mike Harden.
We also offer custom optical and telescope design. For example, in 2011 we successfully designed and produced an observatory class 250mm F/11 R30 Anastigmatic Doublet which received the highest customer ratings possible. We also produced a large 220mm F/15 lens for the famous Australian Mt. Stromlo observatory in direct cooperation with
Dr. Tim Wetherell. Please contact us to find the product that fits your
needs and budget. We hope to hear from you soon and your support is greatly appreciated.
