----------------------------------- KERAUNOS 24 Feb 2008 18:08 Coronado PST VS. Lunt Solar 60mm H-a ----------------------------------- 1.Am gasit de curand acest sistem H-alpha:Lunt Solar 60mm Hydrogen-alpha Telescope System,insa nu prea am gasit review-uri pt el.Astept cu nerabdare parerile voastre si o comparatie "teoretica" intre cele doua sisteme, avand in vedere preturile lor, specificatiile tehnice si upgrade-ul,cel putin pt coronado (acesta oferind posibilitatea de a monta un filtru solar max 40 mm) : Coronado PST 1) Optical: # Objective focal length 400 mm # Clear Aperture 40 mm # Wavelength of Operation 656.3 nm (H-alpha) # Nominal Spectral Bandwidth of Operation <1.0A # Blocking Efficiency 10ﾯ5 # Internal optical re-focusing mechanism provides compatibility with most conventional eyepiece lenses. # Built in Sun finder # fully multi-coated doublet # bottom thread 1/4-20 for standard fit to any photographic tripod 2) Mechanical: # Advantage: telescope body does not have moving or extending parts. # Objective threaded to take SolarMax40 and create <0.6A telescope. # Approximate Dimensions of Main Body 15" L x 2.1" W x 3" H Weight~3lbs # 20mm Kellner Eyepiece included with PST Scope $599.00 The LS60/Ha is a complete Solar Telescope. This refractor based system has a precision aligned air spaced doublet with a 60mm aperture. The focal length is 600mm providing a ~5.4mm image thru a 6mm blocking filter. Course focus adjustment via a slide tube. Fine adjustment is achieved with a Crayford style focuser with 10:1 reduction standard. Specifications: • Aperture: 60mm Precision Aligned Doublet • Focal Length: 600mm • Band Pass: <0.8 Angstroms RMS • Focuser: Precision Crayford style with 10:1 included • Color: Pearl White with Black Anodize System Includes: • LS60 Ha Telescope. • Clam Shell with mounting holes. • Re-enforced case with foam. $899.00 http://luntsolarsystems.com/ls60t_ha.html http://www.coronadofilters.com/products_pst.html 2.Ce dealer avem disponibil la noi pt a furniza PST sau Lunt? PS.fara comentarii de genul:de cat un shtift de PST mai bine iau un SolarMax 40 Telescope(daca PST are <1.0A bandwidth si SMT <.7A bandwidth,etc nu inseamna ca este un junk telescope/calitatea este data de "materialele" folosite in constructie,de constructia propriu-zisa).Sorry de PS,dar am gasit astfel de afirmatii ----------------------------------- Doru Dragan 24 Feb 2008 20:08 ----------------------------------- 1. In mod evident Lunt e mai bun. Are apertura mai mare, focar mai lung si banda de trecere de .7 A fara sa-ti mai bage mana in buzunar dupa nu stiu ce upgrade. 2. Cred ca ti-l poate aduce orice dealer serios. Nu trebuie decat sa faca o comanda si sa achite transportul. Daca vrei ti-l aduc eu :) ----------------------------------- HoO_Germany 25 Feb 2008 11:31 ----------------------------------- Instrumentele de la Lunt inca nu sant avalabile, dar sant in progres. Actual inca nu este nimit cunoscut despre ele, adica nu sant rapoarte de observare date. Dar sa speram ca obtinem cu un instrument mai mult pe piata o gama mai mare, a putea compara preturile si instrumentele intre ele unde alegerea o sa fie poate mai ieftina in general.