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Description du produit
Le tube optique Advanced Coma-Free LX200 est livré avec les revêtements à transmission ultra-élevée (UTHC) de Meade, un miroir primaire en borosilicate à faible expansion surdimensionné, une plaque correctrice en verre Schott Borofloat, une optique à diffraction limitée, une queue d'aronde de style Losmandy et un cache anti-poussière.
Le système optique Advanced Coma-Free (ACF) a mis le plus haut niveau de performance optique à la portée de la plupart des amateurs. Utilisant la conception exclusive de Meade, les optiques ACF atteignent des performances aplanétiques - avec un champ plus plat, un astigmatisme réduit et des pics de diffraction éliminés. Associé aux revêtements à transmission ultra-élevée Meades (standard sur tous les systèmes LX200-ACF), vous disposez du nec plus ultra en matière d'optique haut de gamme.
Tous les modèles LX200 disposent d'un mécanisme de verrouillage du miroir primaire, qui empêche efficacement le mouvement du miroir primaire pendant l'astrophotographie ou l'observation à longue exposition. Tournez le bouton de verrouillage situé juste au-dessus du bouton de mise au point principal du télescope et le verrouillage principal à tension progressive annule complètement tout décalage d'image résiduel dû au mouvement du miroir lors d'applications visuelles, photographiques ou d'imagerie.
L'assemblage de tube optique LX200 de 8" a une longueur focale de 2032 mm, un rapport focal f/10 et pèse 14 lb.
Caractéristiques
| Meilleur pour la visualisation |
Ciel profond plus lumineux |
| Idéal pour l'imagerie | Objets solaires, lunaires, planétaires & Messier |
| Capacité d'astro-imagerie | Lunaire, planétaire et longue exposition |
| Niveau de l'utilisateur | Avancé |
| Conception optique |
Advanced Coma-Free (ACF) |
| Diamètre optique | 203mm |
| Distance focale | 2032mm |
| Rapport focal | f/10.0 |
| Pouvoir de résolution | 0,57arc*s |
| Grossissement utile le plus élevé | 300x |
| Grossissement théorique le plus élevé | 406x |
| Limitation de la magnitude stellaire | 14.2 |
| Qualité optique | Diffraction limitée |
| Portée du chercheur | Aucun |
| Mise au point | Interne |
| Type de montage | Tube optique sans support |
| Matériau des tubes | Aluminium |
| Poids, tube optique | 14,0 livres. |
| Accessoires supplémentaires inclus | Barre à queue d'aronde de style Losmandy |
| Autres caractéristiques | Revêtements à transmission ultra élevée (UHTC) |
| garantie | Deux ans |
Customer Reviews
Purchased the above optical tube as a replacement for a damaged 8" Meade F/4 Newtonian reflector. We are casual observers (no astrophotography buffs here) - love deep sky objects, planets, etc. - and the LX200 certainly does not disappoint. Field of view is slightly smaller than our Newtonian, but the optics are absolutely wonderful and the price point was perfect for our family. One month of observing into it and there is noticeable difference with crisper, brighter nebulae, Jupiter, and Andromeda. Loving it!
This scope is great for anyone wanting to capture smaller DSO targets like star clusters or galaxies. Let's in a lot of light, and stars are pin point sharp. It can also be used as a Solar System imaging scope with a nice long focal length of 2,032mm. I can't speak to its use for visual astronomy, since I only use my telescopes for astrophotography.
The focuser is smooth. I haven't played too much with the focus lock, so I don't know much about that from my own experience. There is no visual back included with the scope itself, but the rear threads will accept a standard SCT visual back of either 1.25" or 2". Also, as it standard with most OTAs, there is no finderscope included. It has a bracket for a Meade finderscope, which isn't compatible with the standard mini dovetail base. There are finderscope base plates that can be purchased, I believe, which will replace the Meade plate. Alternatively, Meade sells their own finderscope, which I looked into. They seem quite nice. If you're already a Meade owner, this will likely be a non issue. If this is your first Meade telescope, like mine, it's a very minor issue which can be solved very easily.
The dovetail bar is a Losmandy wide bar, which requires a mount that can hold a wide plate. I'm using a SkyWatcher EQ6-R, which has the capability, and the scope rides on that mount like a daydream on a Sunny afternoon. The tube construction is very solid, and feels like a million dollars. The front dust cover is a solid aluminum, I believe, and is lined with foam to protect the OTA outer finish. Very classy on Meade's part. The rear cells are covered with a cap that screws on. If you decide to keep a visual back on the OTA, then the cap is no longer necessary, but still good to keep around.
The optics are very nice, and the secondary is held on place with three screws on the outside of the housing. The three inner screws are used for collimation. Collimation is very simple, as with any SCT. If rating this OTA on a scale from 1-10, I'd rate it 9. Light weight, yet solid, large aperture for collecting lots of light, produces beautiful views.
