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"Within a temperature range of 10°C we see no measurable change in focus. Also, there was no change in focus as a function of telescope position."
- Michael Schwartz, Tenagra Observatories, 16" f3.75 Dream Astrograph owner. 


16" f3.75 Dream Astrograph

Faster f-ratio Dream Hypergraphs are listed near the bottom half of page.

The only athermal instruments in the world that use such a high percentage of carbon fiber (95% of the weight of the telescope structures without optics) and mates those low-mass, high stiffness athermal structures with highly engineered, lightweight zeroDELTA mirrors. The entire system is optimized from the ground up for cutting edge installed performance, eliminating countless areas of performance loss. These are truly modern instruments with unrivaled consistent, long-term installed performance and the lowest possible maintenance.


The latest CMOS detectors have much smaller pixels (3.76µm versus the typical 9µm pixels of the previous generation of detectors). Dream and our existing customers don't need to upgrade anything. Our optical instruments have always achieved higher performance and we've always designed closer to the diffraction limit. In 2020 alone we designed more than a half a dozen optical systems ranging from 16" to 25" apertures, with f-ratios from f2.95 to as fast as f1.35 and for sensors from as small as 24mm x 36mm to as large as 95mm x 95mm.

Roughly 90% of what Dream designs & produces is custom. Contact us to determine whether your project can use an existing design, a slightly modified existing design or requires something completely custom. We've been designing & producing fast optical systems since 2003. Our lead optical engineer has four decades of experience with fast systems.

IMX461 CMOS: 3.76µm pixels, 11656 x 8742, 55mm image circle.
Field Of View: 73.9' x 98.6' (2.0 deg²)
Arc-seconds/pixel: 0.51
 

 

OTA diameter - OD

length

 focal length

CFSC™ hybrid tube: 20.0"

57"

1525mm - f3.75
   
     

lightweight secondary mirror 

weight - pounds

single unit pricing

6"

<65

contact Dream

100% illumination of 55mm image circle - will work with IMX455 & IMX461 detectors

this weight includes focus, 4" coma corrector and FAST.

clamshell rings are not required for mounting, only a dovetail plate

 
 

Click above for additional photos and information.


Click on the photo to the left to see why this telescope does not need clamshell/mounting rings. A direct connection to the mount is superior because there is less chance for flexure, plus it gets the CoG of the telescope closer to the mount; shorter lever arm means less bending.


Click here to see images taken with a 16" Dream Astrograph.

Click here to see images taken with a 16" Dream Astrograph while still here at Dream.


 

M81/M82 image below shows the efficiency and quality of this telescope. Image was taken in less than one full night, with a front-illuminated CCD detector.

16803 CCD detector: 9µm pixels, 4096 x 4096, 52mm image circle.
Field Of View: 83.0' x 83.0' (1.9 deg²)
Arc-seconds/pixel: 1.22

One of Dream's 16" f3.75 instruments (using old 16801 detector) was one of a seven group previous NASA NEO search & recovery project. At least one other group member was using a 1m telescope, showing the extreme power, throughput & reliability of Dream's philosophy of fully dealing with the traditional issues of low stiffness & mirror seeing.

 

Dream's instruments are work horses that operate at the highest level; today, tomorrow and ten years from now.


 16" f2.4 Dream Hypergraph

OTA diameter - OD

length

focal length

20"

37"

975mm - f2.4
space domain awareness satellite debris tracking

406.4mm CA
space domain awareness space situational awareness NASA NEO search & recovery

secondary

weight - pounds

single unit pricing

9.125"

<65

contact Dream

IMX411 151Mp CMOS detector: 3.76µm pixels, 14192 x 10640, 66.7mm image circle.
Field Of View: 140.9' x 188.1' (7.36 deg²)
Arc-seconds/pixel: 0.79
These dedicated optical systems are optimized for 100% illumination of the given detector. The Dream Hypergraphs come with 90mm of back focus. 

16" f2.4 Dream Hypergraph

OTA diameter - OD

length

focal length

20"

36.5"

960mm - f2.4
space domain awareness satellite debris tracking

400mm CA
space domain awareness space situational awareness NASA NEO search & recovery

secondary

weight - pounds

single unit pricing

8.875"

<63

contact Dream

IMX461 101Mp CMOS detector: 3.76µm pixels, 11656 x 8742, 55mm image circle.
Field Of View: 117.6' x 156.6' (5.1 deg²)
Arc-seconds/pixel: 0.79

Contact Dream about your project

Dream Astrographs & Hypergraphs

20"

25"

32"

R-C Cassegrains

pricing, availability and specifications subject to change without notice

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ABOUT

TECHNOLOGIES

PRODUCTS

WHITE PAPERS

TESTIMONIALS