The best solution of 55mm back focus length zwo asi. Newtonian reflectors will seldom be able to accommodate the. Oa17 mallincam mfr10, 2 large format focal reducer the mallincam mfr10 mallincam focal reducer10 is a breakthrough in optical performance only from mallincam. Generally reducer will increase inward focuser travel approximately 710mm inward distance. Popular applications include photography, videography, and astrophotography. This does mean however that long focal length newtonian reflectors are also long in terms of the physical tube. About small format, 174, 178, 385, 290, 224, 185, etc. You attach the focal reducer to the rear port on a sct and can keep it covered. I believe the the biggest problem is not having enough back focus, so i was wondering if it was possible to maybe replace the stoc. Use in conjunction with skywatchers m48 sony, canon or nikon tring adaptors. As the aperture obviously does not change this has two effects, firstly the focal ratio becomes faster and secondly the field of view becomes wider. Results are amazing both visually and photographically.
The distance usually expressed in millimeters from a mirror or lens to the image that it forms. To improve the f ratio it was suggested to me that possibly the meade 6. This, added to the inability to utilize longer focal ratios for certain objects, led celestron to design the fourelement, fully multicoated f6. Focal reducers shorten the focal length and speed up the focal ratio of a telescope. But i have always been able to get the whole moon in with the camera directly onto the scope prime focus. The celestron reducercorrector offers wide fields of view with any schmidtcassegrain telescope. Focal reducers and correctors tring astronomy centre. Focal reducers can also be very useful for astrophotography.
A focal reducer is a little piece of magic between two lens mounts. How does image quality compare using the fullframe sony a7 vs. Focal reducers complete overview and function youtube. We offer a wide selection of telescope field flatteners, reducer correctors, and more.
When i had my fuji xe1, i used lens turbo exclusively with kmount glass it was a travesty that i never got use the fujinon xf 1655 f2. Focal reducers are great for astrophotography and visual use. A reducer is a set of converging or positive lenses that cause the light from a telescope objective to converge at a steeper angle to the focal plane as if it were coming from an objective with a faster lower focal ratio and a. A device that shrinks the effective focal length of the telescope. Reducers are similar to barlows, only their magnification factor is less than 1x. The exact focal length of the reducertelescope combo depends slightly on where in the optical path the sct corrector lens is placed. Please be noted that these are just examples for 55mm back focus, you need to know the back focus of your reducer and flattener first and then arrange the adapters. The focal reducer took the vintage lenses and gave me almost full frame coverage, with increased sharpness, and an extra. Just browsing through items on an online store, i saw where meade now has a 0.
Focal reducer works to reduce the focal length of the telescope as expected. The orion focal reducercorrector for ed80 telescope is an economical way to optimize your ed80 for astrophotography with a dslr camera. The faintness of deep sky objects means that dslr and ccd deep space photos can require looong exposures with a long focal length telescope. Focal reducer for mak telescope discussions cameras. Agenas guide to focal reducers agena astroproducts. It reduces the focal length of the newtonian and increases speed together with field correction at the same time. It reduces the effective focal length to create shorter exposure times that result in better, brighter images. This meade series 4000 focal reducer cuts telescope focal ratios by a factor of 0. Shop for focal reducers, coma correctors, and field flatteners from your favorite brands tele vue, baader, antares, and celestron available at agena astroproducts. You can now have a focal reducer for your larger size up to 28. There are lots of great old lenses designed for slrs. This video is a complete overview of focal reducers and how they function applying to telescopes. Optimized for the skywatcher black diamond ed80, this superb quality accessory effectively reduces the telescopes focal length by a factor of 0. Hi,i am thinking of getting a focal reducer for my intes mk66 mak telescope which is 150mm f12.
I have used focal reducers fr with all of my various telescopes at one time or another. Now you use them on a mirrorless camera with an adapter. Focal reducers also reduce field curvature, providing the flat field necessary for astrophotography. But when not in the box or on the telescope, there is no cover for the other end. This clever accessory makes it possible to have a dual focal ratio instrument without sacrificing image quality. Focal reducer on newtonian discussions cameras stargazers.
If youre an astrophotographer seeking even better performance from your orion 100mm ed refractor telescope, our 0. A telecompressor or focal reducer is an optical element used to reduce focal length, increase lens speed, and in some instances improve optical transfer function otf performance. The widescreen centre in london advertise a stf 2 inch 0. If we can be of assistance, please dont hesitate to call us at 18002669590 or send us an email, an. The image was made with the 172mm focal reducer and about 52mm of extensions 30mm extension tube and 22mm of adapters to the emount camera flange. Focal reducer and field flattener combos the focal reducer function. Orion schmidtcassegrain finderscope base and a good finder scope 3. Focal reducer and field flattener combos ccd cameras at.
Focal reducer effectively reduces focal length by half, increase field of view for your eyepiece. New focal reducer for acf telescopes open chat meade. Nominally it will be within a few mm of the rear threads on the telescope. Fully multicoated doublet achromatic lens with internal edge darkening on cnc. A focal reducer does just the opposite of a barlow lens or focal extender. Image showing all three components of the astrotech coma corrector for.
Download the celestron pwi telescope control software. The focal reduction factor of the focal reducer depends on its focal length and its distance from the focal plane of the objective as shown by equation 2. Some may still need focal reducers for optimum performance, which tend to come paired or offered as an. For those who guide their telescope manually, long exposures invite guiding errors as. The focal length is reduced and the field is corrected. With the focal reducer, the apsc sensor captures about the same field of view as a full frame sensor. First light optics suppliers of astronomy telescopes, binoculars and accessories from skywatcher, celestron, meade, william optics, atik, imaging source, starlight. Ts optics the teleskop service brand ts optics is our own brand and stands for an excellent value for money through direct import. Changing this distance should only affect the focal length, not the optical quality. Page 1 of 18 detailed look at focal reducers by jim thompson, p. I believe the the biggest problem is not having enough back focus, so i was wondering if.
Flattens the field in addition to reducing the effective focal length for fast, superior quality astroimaging operations. As the name implies they effectively reduce the focal length of your telescope. Focal reducers and field flatteners orion telescopes. However, when coupled with a star diagonal, a tpiece, and a canon t3i, my nexstar 8se does not have enough play in the focus knob to bring items into focus. Sign up for our newsletter to get the best deals and latest news. Here you find a wide variety of accessory products for your telescope. Improve your night sky views with these telescoping accessories. Modas stands for modern optical design and analysis software it is a telescope design software of the most popular telescope systems used by the amateur astronomers and telescope makers, including spot diagrams, ray fans, wave aberrations, diffraction analysis, optical layout, optimization, tolerancing, mirror testing and many other atm tools. In astrophotography, these qualities are most desirable when taking pictures of nearby large objects, such as nebulae. Skywatcher coma corrector 2 for newtonian reflectors. This combination focal reducer and field corrector lens accessory works with all celestron c5, c8, c9. I have mentioned this in the ls section, but thought i would do so in general discussion as its own topic because it works for lx90, lx200 and lx800 acf scopes as well as my ls8. In most telescopes the focal length is roughly equal to the length of the tube.
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