TAL Klevtsov/Cassegrain

[emipae]

Da molti anni tengo d'occhio questa configurazione, in teoria dovrebbe essere superiore ai mac/cas, qualcuno ne è in possesso ?
In rete o trovato solo la focale 8.5, molti anni fa so che la TAL russa lo produceva a f10, ma la TAL americana e la russa svenduta ?
Le somiglianze degli strumenti ed accessori è evidente, son proprio rimasto indietro.

Technical Specifications:
Aperture diameter, mm 250
Focal length, mm 2130
Aperture ratio 1:8.5
Resolution limit 0.5"
Magnification 85X,170X,213X,426X
Limiting stellar magnitude 14m
Optical Scheme Klevtsov /Cassegrain
Finder, visual magnification, x
objective lens diameter, mm 9X50, Illuminated
Focusing device 2", 1.25",Crayford
Tube length, mm 660
OTA Material Aluminum Alloy
Telescope weight, lbs 33

TAL-250K 8.5 is the latest model of the Klevtsov/Cassegrain designed telescope. Primary mirror correction is made without removing the focusing mechanism during a simple star test. Portable design with a superior Klevtsov optical scheme and durable construction allows you to take this powerful telescope with you on the road, easily and worry-free. Klevtsov's revolutionary catadioptric design employs a sub-aperture meniscus correcting lens (like the familiar Maksutov) combined with a Mangin mirror-lens secondary. Diffraction artifacts are well controlled by unique curved spider vanes. OTA is made from an aluminum alloy.

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