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No hay artículos en el carroImagine having two telescopes in one — a long focal length instrument for lunar and planetary work and a short focal length scope for deep sky observing and astrophotography. With the Celestron Reducer/Corrector Lens, that’s precisely what you get. Explicitly designed for Celestron Schmidt-Cassegrain telescopes, this unique lens reduces your telescope’s focal length and f/ ratio by 37%, turning your long focal length telescope into a fast, short focal length instrument. A f/10 focal ratio now achieves a f/6.3, while an f/11 focal ratio now achieves a f/7. For visual use, this means you get lower power with the same eyepiece and a wider field of view. Photographically you also get a wider field and much shorter exposures. The Reducer/Corrector is easy to install by threading the unit onto the rear cell of your Schmidt-Cassegrain telescope (or the reducer plate of the C11 and C14). Once installed, you can add additional accessories like T-Adapters, 1.25” Visual Back, Star Diagonal, or Off-Axis Guider. The Reducer/Corrector can also be used for terrestrial digiscoping. The faster f/ratio allows you to use slower film or shoot in lower light level situations and still properly expose your subject. This fully multi-coated lens provides maximum light transmission with near full-field illumination. The lens is housed in machined aluminum for are machined aluminum black anodized. The internal surfaces are blackened and glare-threaded to provide the highest contrast. The lens has a knurled surface, providing a tremendous gripping surface for threading/unthreading.
Andrew T.
Comentado en el Reino Unido el 20 de marzo de 2025
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.
Ron Osborne
Comentado en Canadá el 31 de agosto de 2024
Bought this as return with unspecified minor flaws. Turned out to be just some crap on the lens that easily wiped off. If you own a Celestron C8 and want to see the entire moon its a must-have.
ALBERTO LOPEZ
Comentado en México el 12 de febrero de 2024
Entre las opciones de tener dos telescopios (uno f/10 y otro f/6) y la otra de tener un telescopio f/10 con un reductor intercambiable preferí comprar el reductor y adaptarlo a mi telescopio f/10. Es mucho más práctico y económico. Ademas de que es un producto original de muy buena calidad
JG
Comentado en México el 9 de abril de 2024
Muy buena calidad de imagen y materiales.
Francisco
Comentado en México el 10 de marzo de 2022
Un accesorio realmente necesario para hacer astrofotografia, amplía el campo de visión del telescopio, reduce la distancia focal y aplana (no por completo) los bordes de la imagen. Requerido para los telescopios Nexstar Schmidt-Cassegrain, sobre todos si toman fotos y no tienen autoguiado.Para visual también sirve ya que permite un mayor campo de visión para nebulosas y galaxias grandes además de que permite que el telescopio capte más luz.La calidad en cuanto a función y materiales es muy buena, el precio, como todo en astronomía es un poco elevado.
Customer
Comentado en México el 3 de marzo de 2021
Tengo un telescopio Celestron NexStar 6 y adquirí este lente pensando en su utilización para astrofotografía de objetos del espacio profundo. En este aspecto, es un accesorio extremadamente útil, casi diría obligado. Sin embargo, si uno desea simplemente dar un vistazo por el ocular, el corrector proporciona unas espléndidas vistas con gran luminosidad y nitidez.
Adán Ugarte Pineda
Comentado en México el 8 de octubre de 2021
Puedo decir sin temor a equivocarme que el aditamento ha superado con creces mis expectativas. La corrección de campo que hace es espectacular, mejora mucho la imagen y además ha vuelto a mi C11 en un telescopio súper luminoso. Probadísimo de manera muy satisfactoria en visual, y asumo que se comporta igual de maravilloso en fotografía, sólo que yo personalmente no he podido probarlo en ese rubro dado que mi aparato es de la serie CPC y por lo tanto tiene montura AZ y no cuento ni siquiera con una cuña ecuatorial para intentar hacer alguna foto de cielo profundo. Pero en visual, mis respetos para ese reductor de focal. Lo recomiendo mucho.
Tirso Suarez Nuñez
Comentado en México el 22 de octubre de 2021
El articulo esta ok pero hasta la fecha no alcanzo a apreciar su contribución en función al precio que pagué por él¡
Christoph
Comentado en Alemania el 30 de noviembre de 2020
Der Reducer macht bei mir alles richtig. Das Bild bleibt zum Rand hin deutlich schärfer und hat keine auffällige Verzeichnung, Krümmung mehr. Bis jetzt sehr zufrieden.
Night Sky Fan
Comentado en los Estados Unidos el 24 de octubre de 2011
I am sorry that I did not buy this accessory two years ago. It all began with a used Celestron C5. Then I bought a very nice used Nexstar 8SE and thought wow, I should have done this go-to thing sooner. After a year or so, I moved up to a new Celestron CPC925 and decided to explore video astronomy with an inexpensive Samsung SBC-2000 security cam. Most SCTs have a focal ratio of about f/10 (focal length divided by aperture) but a camera works better with a faster (shorter focal length) scope. The usual way to do that with a video camera is to screw on a small .5x reducer. So I bought on of those for $35 and was just amazed at the detail and colors in the Dumbbell Nebula. Then someone over at Cloudynights.com suggested that try adding a f/6.3 reducer (stacking reducers). So I bought the f/6.3, screwed in on the back of the CPC925, replaced the visual back and diagonal, mounted the camera (without the .5x) and stayed up until 2AM looking at the Orion Nebula. Before heading for bed, I pulled the camera, put in a 20MM 68 degree APOV eyepiece, and had another "Wow!" moment.The Celestron f/6.3 reducer-corrector really brightens the image, widens the field of view, improves contrast and detail, and flattens the image improving the look of stars near the edge of the field of view. Many people leave them on all of the time except when looking at the moon and planets or other high magnification situation.There are other and cheaper reducers on the market and they do work. However not all of them offer the same degree of improvement at the edge of the field of view. Rod Mollise writes "...6.3 r/cs are one of the best--if not the best--SCT accessories to ever come down the pike" and "I'll put it this way...the 6.3 rarely comes off the rear cell of the C8."
R. Paris
Bought for my Celestron C5.Works well, nicely machined, solid and let's you have two telescopes for the price of one!
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