Celestron Field Lens Corrector/Focal Reducer, Black

I use this often. works great!

I have Celestron C8, this has a focal ratio of F/10. You don't necessarily need to know what that means but Astrophotographers would describe this as a "slow" ratio. Great for planetary obsevation. For nebulae, star clusters etc, still a great all-rounder, but some nebulae are quite large and/or diffuse. The focal reducer gives F/6.3. (faster). This means a wider and brighter field, though magnification can be applied to it, as normal. The Pleiades are almost all available in a low powered eyepiece, the moon is fully observable. When I went comet hunting, it gave me a better all-around view, before zooming in for the Nucleus and Coma. This may be classed as a luxury item, but it Does enrich the brightness and gives wider angle vistas. There are comments that it flattens the field. This means that at the margins of the view, in an SCT, the stellar points of light, can become slightly elongated. This is corrected with this lens. A good purchase for me, I would recomend, a good astronomer's tool, gives options. Is easy to add and take off the Telescope tube, in low light, thanks to the solid/well spaced screw thread.

Bought for my Celestron C5. Works well, nicely machined, solid and let's you have two telescopes for the price of one!

Fantastisches Teil für großere SC Teleskope. Scharfes Bild bei der empfohlenen Abstand zu Kamera Chip von 105mm. Die Korrektion am Rand ist für mein Geschmack besser als bei der Antares Variante, eventuell bei mir der Fall, da ich ein Celestron besitze.

Ainda não tive a oportunidade para utilizar. Mas o produto parece ser de boa qualidade, bem construído, em alumínio fundido e pintado, lente multi-coated.