Since 2003 Dream has produced optical instruments with truly the highest amount of carbon fiber & CF skinned Sandwich Core (CFSC™) of any company in the world. Dream designs & fabricates all of the carbon fiber in house & has been doing composites for the past 20 years. Others use aluminum and solid mirrors extensively, which shows in the mass of their products. Dream's technologies produce instruments that are often 1/2 to 1/3rd the mass of others who claim to be "lightweight," because Dream uses carbon fiber honestly & to such a high level. Dream's CFSC™ has been developed over the past 20 years and is an ideal technology for opto-mechanical systems; high modulus, low structure & thermal mass, with a Coefficient of Thermal Expansion that matches Dream's highly engineered lightweight mirrors.

***- 95% of the structure weight (without optics) is carbon fiber with only 5% traditional metals (mostly stainless steel).

Make sure the instrument you're considering uses carbon fiber extensively. Ask pointed, specific questions, especially for the mirror mounts, and look closely at photos. There's no truth in advertising, which is one of the main reasons Dream was formed in 2003 and has taken over so many aspects of the products since then. Anodized aluminum isn't remotely close to the same in mechanical or thermal properties as Dream's CFSC™... Buyer beware.

***- The highest stiffness, lowest mass structures & instruments in the world, producing cutting-edge all-sky performance.*

***- While other companies say "carbon fiber telescope," most use only 5-10% CF by weight & 90-95% high CTE aluminum.

******True performance doesn't require constant refocusing to compensate for low stiffness & non-athermal losses.

Knowledge is power. Ignorance a liability.™

Custom Dream true R-C 20" f7.5 shown in the f5.6 focal reducer configuration. Telescope tube 44" long. Spider hub, vanes, inserts & hardware are stainless steel.

* Both front surface optical mirrors are Dream's zeroDELTA™ engineered lightweight mirrors.

***- Mirror seeing and tube currents are eliminated due to Dream's thin-featured highly engineered lightweight mirrors.

***- Dream's zeroDELTA™ mirrors equalize hundreds of times faster due to extremely short thermal time constant & FAST™.

***- 3-6 times lower mirror mass than solid mirror technology, producing far less flexure of mirror mounts and structures.

***- Much higher mechanical stiffness than overly thin, extreme conical mirrors that can't hold their optical surfaces.

***- M2's have been finished to as high as L/125 RMS surface (4.5x better than the diffraction-limit), with 2Å (0.2nm) RMS surface

******roughness & will maintain that extreme performance over at least a +/-3°C temperature swing, which equals the stability

******of the finest grade (lowest CTE) Zerodur.

* FAST™: Dream's Filtered Air System Technology.

***- Equalizes the mirrors and interior air volume, while also keeping optical surfaces clean for extended periods of time.

***- Maintains higher reflectivity longer, requiring fewer cleanings & extending the useful life of coatings.

* Intelligent modern designs, implementation and technologies that provide truly cutting-edge total installed performance.

* Policies & Warranty. Officina Stellare Space Factory, Officina Stellare space telescope, Officina Stellare collimating telescope, autocollimation flat, autocollimating telescope

The three sizes shown below with a red background are the most common sizes and represent shorter lead times. More than 90% of what Dream produces is custom.

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clear aperture		optical	illuminated
size	f-ratio	back focus	field	M2 CA	length	weight	model
12"	8	200mm	55mm	103.6mm	27.8"	25 lbs	DRC12-8
14.5"	8	235mm	55mm	119.1mm	32.5"	36 lbs	DRC14-8
16"	8	265mm	55mm	134.0mm	37.1"	41 lbs	DRC16-8
20"	8	325mm	55mm	164.0mm	46.2"	69 lbs	DRC20-8
20"	5.6	275mm	55mm	178.6mm	42.0"	65 lbs	mRC™20-5.6
25"	8	400mm	55mm	195.3mm	55.7"	125 lbs	DRC25-8
32"	8	535mm	55mm	256.5mm	74.3"	215 lbs	DRC32-8
40"	8	650mm	55mm	315.9mm	92.3"	352 lbs	DRC40-8

If the above 55mm field Ø is too large or small, Dream can modify an existing design, including corrective optics.

Visit this page to learn more about the amazing 2-mirror, single lens 20" f5.6 that is the epitome of efficiency & performance.

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