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ODK20range

Because of many, many possible clients asking us for a larger model in the ODK range we are now in the process of offering a 500mm model with a carbon truss type tube.

We made two similar models to the one we have now in production and these were supplied to the ESO and ENO observatories.

Brief specification of the ODK20 is shown it the table top right, it is indeed a marvellous instrument and is based around a design which has supplied data to assist in the control of these two enormous main instruments iat the Canary Islands and Paranal observatories.

As a minimum we recommend a Paramount ME to compliment the ‘scope or mount with similar carrying capacity.

We expect to customise several aspects of every model to your own specifications. We do not wish to impose a fixed design if a few modifications could suit your needs better. Prices quoted are for standard specification as above.

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Credit: GIANLUCA LOMBARDI
ESO - European Southern Observatory, La Silla Paranal Observatory


 

*The weights shown on each model refer to the standard optical tube with no additional equipment added.

Specification

ODK20

Aperture

500mm

Focal length

3400mm

Focal Ratio

f6.8

Tube Weight (inc.
mount plate/dovetail)

61kg

Central Obstruction

39% of the Primary
Mirror Diameter

Back Focus from
Cell outer surface

255mm

OTA Length

1180mm

Tube Material

Carbon fibre and
Carbon fibre struts

Primary Mirror Dia.

515mm

Primary Mounting

Collimated and Fixed

Primary Material

Schott Suprax

Primary Coating/Shape

Hilux 97%
Ellipsoid

Secondary Mirror Dia.

199mm

Secondary Material

Schott Suprax

Secondary Coating/Shape

Hilux 97%
Ellipsoid

Lens Group Dia.

75mm

No. of Lenses

3

Lens Group Coating

Broadband
AR Coatings

ODK10vsml

Model Range

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Optics

Tube Rings

ACU-3S Focuser

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ODK20 Configuration

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Price

Add

ODK20 Optical tube assembly

• • •

22000

ODK20 including Paramount ME2

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32719

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Please Note: All prices shown EXCLUDE VAT

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Return to ODK Model Range

ODK20 CHARTS (click title to view)

Diffraction Limit

Light Path Diagram

Spot Diagrams

Relative Illumination

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GL

Born in Taranto (Italy), Gianluca Lombardi works as an astronomer at ESO La Silla–Paranal Observatory and has been in charge of the E-ELT site testing at all Chilean sites since 2007.

Gianluca is an ESO Photo Ambassador, The ESO education and Public Outreach Department has proudly designated night-sky photographers with special ties to ESO as ESO Photo Ambassadors, assisting them whenever possible and further promoting their photos, so as to bring astronomy closer to people. His photos are published in magazines and books and used at conferences and exhibitions.

See Gianluca' s beautiful time lapse video (opposite) of the ODK20 working in Tandem at ESO  VLT. Gianluca' s stunning photography, not only of the ODK20 and VLT at ESO, Paranal but also breathtaking images of wildlife and landscapes can be viewed from these links:
Gianluca Lombardi Photography 1
Gianluca Lombardi Photography 2

Designated "pt5m" the modified ODK20 is a robotic 0.5m telescope on La Palma for atmospheric turbulence profiling and transient astronomy, operated by the Universities of Durham and Sheffield.

pt5m website
pt5m (ODK20) Live

Below is an intereferogram of an ODK20 we recently sent to a customer who had insisted on a minimum of 1/6 PV wavefront. He had the instrument tested in an independent optical laboratory and the results showed that there was a deviation (error) of 0.092 microns from perfection. That equates to 1/7 PV wavefront. Strehl was 97.4%.

odk20test

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