Losmandy_PresentationNS

OPTIQUE ET VISION
6 bis avenue de l'esterel 06160 JUAN LES PINS
Tél.04.93.61.18.83
ovision@ovision.com

Optique et Vision introduces the concept "NS"
New version!!!
DISCONTINUATED

Thanks to our large experience and partnership with our provider and partner Scott Losmandy, we were the first to:

- install a Vixen Skysensor system whereas the Gemini goto system did not exist yet.
- measure and replace the worm of the mountings to obtain the lower periodic error as possible.
- to develop and produce a new concept of high precision worms for GM8 and G11 mountings, and coupling them to high precision bearings to increase the overall tracking performance. This design was successfuly applied to other mountings brands.
- to develop and produce additionnal mechanical parts to improve performance and comfort in imaging.

After new recent studies, Optique et Vision is proud to announce a new technical improvement 100% designed and manufactured in France for Losmandy german equatorial mountings: the " NS " evolution concept.

Move your pointer on the image to see the newest NS version and the previous NG with cover removed

The two different mounting systems:

- above the one we used until the end of 2007.
- below the new NS housing.

The back of the system, showing the mounting threads.

The assembled housing, ready for installation on the mount.

The new G11 NS design was first shown at Explor'Espace event in Mandelieu in november 2007,

and was the center of interest for many people.

A technical note was available for visitors, that you can find at this link.

Depending on the mount you use and user's choice, the kit is available in different configurations:

1. Housing and " NS " worm and bearings for GM8 et G11 mountings:

The goal of this new worm housing is to allow ultimate tracking accuracy, by using the full potential

of our very high performance worms.

The worms included in this package are not a Losmandy worm. They are made locally, as well as

the housing and other pieces, by a local machining company, in respect to our accuracy and

technical specs. The machining accuracy is three times better than the current "High precision "

Losmandy brass worms, or previous steel versions.

This new housing provides perfect, well aligned coupling of the worm / bearings assembly with the

worm wheel, and thus allowing:

- extremely smooth and nice tracking, with nearly no ripple or sudden variations in the error curve.

- minimal periodic error.

- easy installing and adjustment for the user if needed.

This new option for the Losmandy mountings can be installed at the time of the mount purchase, or

later by the user itself or Optique et Vision if needed.

Each NS kit is checked and individually measured for accuracy before shipping.

The tracking warranty is + / - 5 arc seconds for the G11 mount ( total of 10" peak to peak ), and

+ / - 10 arc seconds for the GM8 mount ( total of 20 arc seconds peak to peak ). This of course

without the use of periodic error correction system in use!

This kit may be factory installed by Optique et Vision at the time of mount purchase, or installed later

at the user's demand.

But the big new is that this kit can be shipped so the user can install it by himself !

The kit contains:

- individual tracking accuracy test report.

- complete user's notice showing installing steps and adjustment to obtain the original tracking

performance guaranteed.

- Measuring method to allow the user checking and confirming the original test measurement done by

Optique et Vision.

Current Brass Losmandy worm, or previous steel version

The current standard Losmandy "High precision worm"

The Ovision NS worm: three times more accurate !!!

The spacer on the Losmandy G11 mount

The interest for the user is obvious: further improving the performance of the equipment, allowing to

explore new imaging ways, like narrowband filtered imaging, where long autoguiding exposure times

are required to get a suitable guidestar. Users of shorter focal lengths, like wide field imaging with

telephoto lenses, will have the opportunity to do unguided shots ( but even this application still requires

good polar alignment and reasonable exposure times !).

2. The " NS" spacer for the G11 mount:

This accessory allows the user to get a few additionnal hours of tracking before having to flip the mount

at the meridian. It allows the user to continue to track and image well after the meridian, with the scope

under the mount, with the stepper or Gemini models ( gemini system allows the user to delay the

meridian flip). This perfectly machined piece nicely matches the finish of the G11 RA axis and does not

change the orthogonality of the axis, and reduces interference of the scope with the mount (depending

on the size and length of the OTA).

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