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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. 


25" Dream Hypergraphs

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.


OTA diameter - OD

length

focal length

30"

67.5"

1905mm - f2.95

secondary

weight - pounds

single unit pricing

9.25"

<170

$143,500

IMX461 101Mp CMOS detector: 3.76µm pixels, 11656 x 8742, 55mm image circle.
Field Of View: 60.2' x 80.3' (1.34 deg²)
Arc-seconds/pixel: 0.41
These dedicated optical systems are optimized for 100% illumination of the given detector. The Dream Hypergraphs come with 90mm of back focus. 


OTA diameter - OD

length

focal length

30"

67.5"

1905mm - f2.95

secondary

weight - pounds

single unit pricing

9.6"

<175

$162,750

IMX411 151Mp CMOS detector: 3.76µm pixels, 14192 x 10640, 66.7mm image circle.
Field Of View: 73.4' x 98.0' (2.0 deg²)
Arc-seconds/pixel: 0.41

OTA diameter - OD

length

focal length

30"

55"

1525mm - f2.4
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secondary

weight - pounds

single unit pricing

11.2"

<170

$183,500

IMX411 151Mp CMOS detector: 3.76µm pixels, 14192 x 10640, 66.7mm image circle.
Field Of View: 90.2' x 120.4' (3.0 deg²)
Arc-seconds/pixel: 0.51
20" f2.4 Dream Hypergraph with IMX461 achieves very similar (3 deg²) field, at 0.63 arc-sec/pixel.
16" f2.4 Dream Hypergraph with IMX411 achieves 7.36 deg² field at 0.79 arc-sec/pixel.

 

25" f2.95 Dream Hypergraph over full IMX411 detector
 

25" f2.4 Dream Hypergraph over full IMX411 detector

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 related to the optical systems. 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.

Contact Dream about your project

Dream Astrographs & Hypergraphs

16"

20"

32"

R-C Cassegrains

pricing, availability and specifications subject to change without notice

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ABOUT

TECHNOLOGIES

PRODUCTS

WHITE PAPERS

TESTIMONIALS