Celestron ExploraScope 80 Manual de instrucciones descargar pdf (Pagina 9)

1.25” EYEPIECE FILTER SETS

Celestron color filters are mounted in black anodized aluminum cells with the Kodak Wratten

Series Number individually engraved. Each set of 4 comes packed in a plastic case. The cells

of each filter are double-threaded, so they can be stacked (piggybacked) in various combina-

tions. This allows you to create different color combinations and transmission characteristics,

or to have the same color characteristic, but with a lower transmission. When stacking color

filters, the effective transmission of the combination you create is equal to the product of the

spectral transmission of each of the filters used.

Eyepiece filters are an invaluable aid in lunar and planetary observing. They reduce glare

and light scattering, increase contrast through selective filtration, increase definition and

resolution, reduce irradiation and lessen eye fatigue. Celestron's filters are made of high

quality, solid plane parallel glass with excellent homogeneity. They are anti-reflection coated

to prevent glaring and ghosting. All eyepiece filters are threaded to fit Celestron's, and most

other manufacturer's, 1.25" eyepieces, and offer a full 26mm clear aperture.

For detailed filter characteristics see Appendix A on page 33.

Model #94119-10

Eyepiece Filter Set - 1.25” (#21, #80A, #15 & Polarizing filters)

Model #94119-20 Eyepiece Filter Set - 1.25” (#12, #25, #56 & ND-25 filters)

Model #94119-30 Eyepiece Filter Set - 1.25” (#23A, #38A, #58 & ND-50 filters)

Model #94119-40 Eyepiece Filter Set - 1.25” (#8, #47, #82A & ND-13 filters)

FILTERS

1.25” MINUS V REFRACTOR FILTER

This high quality filter, manufactured by Baader, eliminates most color

aberration inherent in achromatic refractor telescopes. The filter also

reduces your view of the blue hue around lunar and planetary

subjects. Features multi-layer coatings for 95% transmission.

Model # 94121 1.25” Minus V Refractor Filter

1.25” MOON FILTER

Celestron’s Moon Filter is an economical eyepiece filter for reducing the

brightness of the moon and improving contrast, so greater detail can

be observed on the lunar surface. The clear aperture is 21mm and the

transmission is about 18%.

Model #94119-A 1.25” Moon Filter

94119-10 94119-40

94119-30

94119-20

1.25” UV/IR CUT-OFF FILTER

The ultimate UV and Infrared blocker, featuring hard ion beam coatings, and

fine optically polished glass. The ideal filter for NexImage and CCD imaging.

Freedom from ghost images (very low reflection multi-coating) enables

pinpoint star images and fine planetary detail. Features an extremely sharp

cut-off at 690nm yet leaves all the visible red, including the important 656nm

H-alpha emission line, preventing IR wavelengths from blurring fine detail in digital images.

Model #94125 1.25” UV/IR Cut-off Filter

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Celestron ExploraScope 80 Manual de instrucciones Pagina 9

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