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LACERTA GmbH | Wien | Linz
 
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Teleskop Austria Logo
LACERTA GmbH | Wien | Linz
 

200/800 Lacerta Carbon Photonewton (assembled in Austria, Carbontube made in Hungary)
(--Lacerta hot product: FN2008c-new)

OPTION: add sec.heater



instead of 2499.00 only
2399.00 EUR
(Gross prices are calculated with 19% or 7% VAT. If your country-specific VAT is higher, we take over LACERTA GmbH the additional tax costs)
plus shipping
 




     
Brandname:  --Lacerta hot product
Diam.: 200mm
Focus: 800mm
Mount: OTA
Shipping weight:  35kg (Shipping costs)

Availability
(The stock is for information only and includes items that have already been reserved)
Wien: pre-ordering availble
Linz: pre-ordering availble
Warehouse: pre-ordering availble
Opening hours

Seen cheaper weiter...
We recommend:
KomakorrF4
344.89 EUR
 
M48nM54p508
29.90 EUR
 
APM267x
189.00 EUR
 
APM16x
495.00 EUR
 

Lacerta Photonewton

optimized for astrophotography


Our optimized Newtonian combines high-end features with economical design where it is possible without compromise. We have created our own brand, which is used by the most active and best photographers - because the optical quality and reliable stability are well known.

Pictures say more than words: Who takes pictures with Lacerta Fotonewtons?

Michael Jäger
Markus Blauensteiner
Jens Zippel
Herbert Walter
Rochus Hess
Michael Schmidt
Tommy Nawratil
Peter Kohlmann

what is new in ?

Even proven things can be improved! The new Lacerta Fotonewtons got:

  • newly designed 9 point main mirror cell with hanging and height adjustable main mirror
  • ring diaphragm integrated in the HS cell (instead of retaining clips)
  • newly designed secondary spider milled out of one piece
  • specially designed hexagonal CNC tube clamps
  • new 6mm thick carbon honeycomb tube, mady by a airplane parts manufacturer

assembled and individually tested in Austria


The LACERTA photonewtons do not come ina box from the Far East, but are assembled from components (which mainly come from Austria, Hungary, China, Japan and Taiwan) by our workshop master Peter Kohlmann in Austria. He is ultimately responsible for the precise fit of all parts, the adjustment of the OctoPlus focuser and the stable assembly. Each specimen is fine-tuned and the optical quality is tested with an artificial star at a distance of 40 meters. The tests are evaluated together with our optics expert Tommy Nawratil, and the optics are then released or exchanged.

Carbon tube - made in Hungary

Not all carbon tubes are the same. To reliably produce stiffness and lightness of the tubes, special knowhow is required. Our manufacturer also produces aircraft and rocket components and has absolutely convinced us with its new quality. The carbon tubes are 6mm thick and have a honeycomb/bridge structure inside: stability increased and still weight saved! The tubes are painted white to radiate little heat upwards at night and absorb it from below.

Main mirror mount - designed in Vienna

A completely new design by Christopher Teppan and Peter Kohlmann, well thought out and optimized with Finite Elements and Plop , including several years of sacrificial testing under the Namibian starry sky! The most important features:

    Most precisely positioned 9-point support for the primary mirror (one is amazed at the differences in primary mirror deformation that can result from the positioning of these 9 points!)
    Elimination of optical disturbances caused by holding clamps by a full metal CNC ring aperture (not a cheap 3D printer part with a fuzzy edge, which is offered by many "experts" again and again),
    possibility to adjust the distance between main and secondary mirror individually (in case you want to change the focus position for other accessories)
    adjustable fit of the main mirror, no wobbling around or deformation due to pressure
    complete absorption of forces and focus shift by swinging from zenith to horizon,
    ...and much more...

OctoPlus focuser - assembled in Austria:

A focuser with maximum stability, already in its 3rd generation with oversized bearings, designed and built by Peter Kohlmann.
The coma corrector is kept stable on axis by the slip fit in the focuser tube, but is fully rotatable. The centerlock clamp, designed by G. Perger (Hungary) and further developed by us, holds it securely in position, even with an eccentric filter wheel and with several kg of load (up to 4kg already tried).

When we say "stable", it does not mean "a tick more stable than other extractors", but REALLY stable. We have tested the lateral bending forces and minimized deviations, and the results speak for themselves. The OctoPlus focuser is prepared for a LACERTA MFOC motor focus with 1 micron reproducible focusing accuracy and with optional temperature sensor.

Customer quote (Rochus Hess): "The focuser is indeed very stable and the corrector fits exactly into the focuser, you did not promise too much".
Customer quote (Bernd Weinzierl): "Tommy I really like this part!!! Perfect clamping, no tilting, no shifting, how could I get along without the Octo???"

The carbon tubes are lined on the inside with a new type of flocked film.

In fact, the absorption coefficient for grazing incident light is even better than with velour. At the same time, the foil acts as an additional insulating buffer layer for heat exchange between the tube wall and the inner air, and further reduces the already low tube entrance due to the white carbon tube. The film is so densely flocked that it looks like velor at first glance - but unlike velor, it does not absorb moisture or lose fibers.

Side blackened secondary mirror - with steel washer

If blackening is to be done, then do it properly! Stray light can also come from the lighter side surface of the secondary mirror. Blackening the rough secondary mirror side surface effectively prevents this!

The adjustment screws of the secondary mirror are designed as Allen screws, so that you can create good tension during adjustment. This is important so that the fan mirror remains nailed in position even when panning. A steel washer prevents the screw tips from digging into the mirror holder, which often leads to adjustment problems with cheap solutions.

We offer to install mirror heaters at the same time. The supply lines are laid as flat cables along the spider legs, so that they do not protrude. An RCA connector is placed in the tube wall.

secondary struts including stabilizing ring - milled in one piece from solid material

Too thin secondary mirror struts warp and bend too easily, and are usually screwed individually to the tube. Therefore you have to take care that they are well aligned during adjustment to avoid unsightly fanned out spikes. The new end ring, including spider legs and FS retaining block, is now cut from a single aluminum block with a laser beam and reworked with CNC. The deformation behavior between the telescope tilted towards the horizon and zenith was computer modeled to keep the secondary spiders as thin as possible, but at the same time to suppress the deformations. The spider legs thus align perfectly and neither yield nor can they be mistakenly adjusted. The end ring also serves as the end stiffener for the carbon tube, and optimally stabilizes the nearby OctoPlus extension.

CNC machined tube clamps

The hexagonal tube clamps are also full of ideas. They allow rails to be attached at the bottom, top, and another 4 positions (fully compatible with the LACERTA BAUKASTEN system). There are several M6 threads at the top and bottom, and they can be re-drilled at the side.

A minor detail, but you may appreciate it: There is nothing sticking out of the Lacerta pipe clamp (not even the clamping screws) where a cable could get caught during nighttime operation. Unless you want it to: there are plenty of pre-drilled holes with M6 threads if you want to attach accessories or strain relieve cables....

versatile applications:

The LACERTA photonewton has a backfocus of 55mm above the centerlock or GPU coma corrector, but can be configured to be versatile. It is also fully usable visually. For this purpose, the coma corrector can be equipped with an eyepiece sleeve (M48nM54p508). For visual observation without a coma corrector, take an extension under the eyepiece adapter (2x M48M4837). For observation with binoviewer, the coma-correcting Düring Barlow is suitable as a glass path corrector ( APM267x ), or the Baader 1.6x coma-correcting glass path corrector. Photographically, the focal length can also be extended, either with comacorrecting Barlows like the APM16x , or with normal Barlow lenses.
If the focus position should ever not fit, a 12mm sleeve can be removed from the OctoPlus extension ( Octo60plus12mm ) and you can focus further in. You can also screw on more 12mm sleeves to get further out. The OctoPlus also holds a corrector on axis when its not on - its no problem to use the corrector as a continuously adjustable sleeve and re-clamp it. This is just a suggestion to try it out for yourself and discover possibilities!

Customer quote (Michael Jäger): "I have had the Newton in my car for 25,000km and have never had to readjust it."
Customer quote (Norbert Mrozek): "You have really built a great instrument, I am totally thrilled. I was able to take the first pictures yesterday evening. Everything you promise, you deliver."

Optionally recommended:

We offer to this f/4 photonewton as a package offer also the 4-lens GPU Komakorrektor: KomakorrF4 (optical Design by Pal Gyulai / GPU / Hungary).  Unlike simpler correctors, it does not cause spherical aberration on the optical axis. To see the difference between the 4-lens GPU and probably the best dual-lens coma corrector (MPCC by Baader), you should open both images below in two separate windows and then compare them. Note the fine planetary nebula at the center of the image and the limiting size (courtesy ONLY for Teleskop-Austria of Burkhard K. from Bondorf - copyright please note!)

www.teleskop-austria.at/info...4-lens-GYULAI.jpg
www.teleskop-austria.at/info...-2-lens-MPCC.jpg

Technical data 8" f/4

Weight: 11kg (with tube rings and Losmandy rail)
Overall length: 790mm
Diameter tube 245mm (outside)
tube thickness: 6mm
secondary 70mm small axis
secondary 535mm above HS
focal point 140mm above tube/70mm above OAZ
Mirror material: Pyrex, total system has no temperature drift all night long

Scope of delivery:

Tube clamps, Losmandy rail, finder bracket, front and rear covers

Delivery:

Our photonewtons are best adjusted before optics test, then well packed on wooden pallets and delivered by a professional shipping company such as Dachser.
This is a bit more expensive than a normal parcel service, but the safest and smoothest transport method.
Self-collection in one of our branches is welcome and of course free of charge!

More astrophotos:

M45 (Rochus Hess mit FN2008c-flat und Gemini G53f)
Iris Nebula by Stefan Roth

hier finden Sie einige optische Testberichte




We recommend:
KomakorrF4 Aplanatic Super coma corrector (for f/4 and f/5 Newtonians) 344.89 EUR
 
M48nM54p508 Combined 2" Eyepiece adaptor from M48x0,75 (int.) AND M54x0,75 (ext.) to 50.8 (internal) 29.90 EUR
 
APM267x 2,67x APM Comacorr-Barlow (visual housing) 189.00 EUR
 
APM16x 1,5x APM Comacorr-Barlow (50,8mm with original housing) 495.00 EUR
 
Octo60plus12mm Octo60 extender with centerlock-profile (12mm) 27.90 EUR
 
FN25010c-new 250/1000 Lacerta Photonewton (Carbontube made in Hungary, assembled in Austria) 2999.00 EUR
 
DewCap8 Flexi Dew shield for tube with 64-81cm circumference 43.89 EUR
 
FFB25plus Flatbox with neutral white LED light, D=283mm, powered by 12V 179.89 EUR
 
Spider200 spider for secondary mirror for 8" Newtons D=233mm, with stabilizing ring, milled from one piece, matte black anodized 199.00 EUR
 
Nexus-075 Starizona Nexus 0.75x Newtonian Focal Reducer/Coma Corrector 713.89 EUR
 
SF100-9 Solarfilter SF100 for 207 mm aperture (tube D=215-273mm) 121.00 EUR
 

SUPPORT

Video

Photos
FN2008c-new 20201222 161627
FN2008c-new 20201222 161807
FN2008c-new 20201222 162035
FN2008c-new 20201222 162327
FN2008c-new 20201222 162757
FN2008c-new 20201222 162945
FN2008c-new 20201222 165323
FN2008c-new 20201222 165451
FN2008c-new 20201222 165724
FN2008c-new 20201222 171923
FN2008c-new 20201222 172129

 KALENDARIUM
INFO!
Code: MGEN-3 | The delivery situation is still stable:
All required components are currently in stock in our central warehouse.
New orders will be completed in about 2-3 working days after receipt of payment.

more infos

INFO!
Code: FN2008c-new | The delivery situation has improved:
Delivery time for new orders: ca. 120 days
Payments are requested ASAP after our finalization and test notification!

more infos

INFO!
Code: FN25010c-new | The delivery situation has improved:
Delivery time for new orders: ca. 120 days
Payments are requested ASAP after our notification that the FN is finished and tested!

more infos

INFO!
Darkfieldmicroscopes We configure your dark field microscope according to your wishes.
New orders will be completed in about 2 months after receipt of payment.

more infos

2024-04-05
TELESCOPIC EVENING

Together we will explore the world of telescopes and start from “zero” for beginners. We show the basics of how a telescope actually works, what differences there are and combine this with hands-on practice.
Everyone is welcome to bring their own instrument and get to know it better with our telescope experts, including Gerhard Rehak.

more infos


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