User manual ORION TELESCOPES & BINOCULARS 08748

[. . . ] Varipower 2­3x Barlow #8748 Variable Barlow The Orion VariPower Barlow allows you to vary the power of any eyepiece from 2x to 3x. This will effectively give you almost an infinite variety of magnifications within the range of your telescope. The stability of the atmosphere, or "seeing" varies tremendously from night to night. [. . . ] If the outside of the lens should become dirty, you may want to clean it. Blow off all loose dirt with compressed air. Use only lens tissue and good quality lens fluid. Wet a folded tissue and gently wipe the surface of the lens. Immediately use a second dry folded tissue and gently dry the lens off. Do not rub or apply pressure, as this may scratch the lens if dust or grits present. Use of Orion Barlow Lenses Orion Barlows are used between the telescope and the eyepiece. They can be installed between the telescope and your diagonal, or between the diagonal and the eyepiece. The relative distances between barlow and eyepiece affect the magnification that the barlow produces. If the barlow is farther from the eyepiece (installed before the diagonal as in illustration "A" at right), magnification will be higher. If the barlow is closest to the eyepiece (installed in the diagonal as in illustration "B" at right), magnification will be lower. Some barlows will not fit into the diagonal, so install these barlows between the telescope and diagonal as in illustration "A. " Install either type of barlow in reflector telescopes as in illustration "C. " The magnification is varied by moving the lens cell up and down. The small set screws on either side of the internal lens cell indicate the 2x to 3x magnification when viewed through the slit in the side of the barlow. [. . . ] That would give you magnification which is not practically possible with most telescopes. A Barlow before diagonal (typical refractor) B Barlow after diagonal C Barlow in typical reflector Customer Support (800) 676-1343 E-mail: support@telescope. com Corporate Offices (831) 763-7000 Providing Exceptional Consumer Optical Products Since 1975 P. O. Box 1815, Santa Cruz, CA 95061 IN 005 Rev B 0300 [. . . ]