Solar Filter

Should I buy a neutral density moon filter in order to view the moon through my telescope?

I have a 5" reflector telescope with a 5" cover that allows a smaller hole to be opened for reduced light transmission. It seemed to make the moon dimmer, but I also lost quite a bit of contrast (or resolution?) for some reason. I wonder if that little opening in the telescope cover has any purpose in protecting the internal optics during solar viewing, but all the solar filters seem to be aimed at covering the aperture, 5" in my case (and they are expensive, too). Anyhow, the moon filter seems like it would do the very same thing as making the aperture smaller, but people sell 1.25" moon filters, and 5" moon filters with neutral density and with other colors bias, like green. Do I need a neutral density filter, or some other kind, or does my aperture limiting with the hole in the cover already allow good moon viewing?
Is there any advantage for a 5" aperture ND moon filter over a 1.25" eyepiece ND moon filter?

Reducing the aperture is the same as using a smaller telescope, thus the reduced resolution. But I cannot imagine a real need for a lunar filter. It is not that bright, so unless you are concerned about reduced dark adaptation after lunar viewing, why bother. As for solar filters, a lot of the stuff that is provided with a telescope, especially the smaller and less expensive ones, is pure junk. Go with a good 5.0 neutral density filter. If you really feel the Moon is too bright, a 1.0 ND should be enough. Remember, at Full Moon you can't see much in the way of craters or mountains anyway from lack of shadows.

Solar Filter - Filtro Solar




Solarlite Solar Filter Film Optical Density 5 6 x 6 Thousand Oaks Optical
Solarlite Solar Filter Film Optical Density 5 6 x 6 Thousand Oaks Optical

$16.00
16d 4h 30m remaining

Celestron EclipSmart Solar Filter for Celestron 8 Schmidt Cassegrain Telescopes
Celestron EclipSmart Solar Filter for Celestron 8 Schmidt Cassegrain Telescopes

$48.99
2d 21h 49m remaining

Celestron EclipSmart Solar Filter fits PS70AZ PS70EQ TS70
Celestron EclipSmart Solar Filter fits PS70AZ PS70EQ TS70

$16.19
8d 5h 54m remaining

Solomark Deluxe Adjustable 86 117 Mm Inside Diameter Solar Filter
Solomark Deluxe Adjustable 86 117 Mm Inside Diameter Solar Filter

$28.00
22d 28m remaining

ORION 60mm 232in Solar Safety Film Filter for 50mm Finderscopes
ORION 60mm 232in Solar Safety Film Filter for 50mm Finderscopes

$15.00
4d 2h 36m remaining

Gosky 100mm Eclipse Solar Filter Telescope Binocular Spotting Scope Solar Filter
Gosky 100mm Eclipse Solar Filter Telescope Binocular Spotting Scope Solar Filter

$30.00
22d 28m remaining

Orion 410 Telescope Solar Filter BRAND NEW item 07733
Orion 410 Telescope Solar Filter BRAND NEW item 07733

$69.00
4h 16m remaining

Celestron Eclipsmart Solar Filter for 6 SCT
Celestron Eclipsmart Solar Filter for 6 SCT

$39.95
19d 3h 54m remaining

Gosky 70 80 Solar Filter Baader Film for Celestron 70mm 80mm Aperture Telescope
Gosky 70 80 Solar Filter Baader Film for Celestron 70mm 80mm Aperture Telescope

$16.00
22d 28m remaining

Celestron EclipSMART Solar Filter for Select Celestron 127mm or 130mm Newtonian
Celestron EclipSMART Solar Filter for Select Celestron 127mm or 130mm Newtonian

$23.95
8d 6h 19m remaining

Celestron EclipSmart 94221 Solar Filter for 70mm refractor Black
Celestron EclipSmart 94221 Solar Filter for 70mm refractor Black

$17.99
27d 3h 28m remaining

Solar Film Filter 67mm
Solar Film Filter 67mm

$49.50
3d 5h 43m remaining



« Previous12345...89


Tagged with:

Filed under: Eyepieces & Accessories