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




New Orion 6 inch Glass Solar Filter
New Orion 6 inch Glass Solar Filter

$29.00
6d 21h 19m remaining

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

$49.95
28d 13h 57m remaining

Orion 07731 Glass Solar Filter SVD 45 VX102 For Telescope
Orion 07731 Glass Solar Filter SVD 45 VX102 For Telescope

$24.99
29d 4h 50m remaining

Solarlite Solar Filter Film Optical Density 5 8 x 8 Thousand Oaks Optical
Solarlite Solar Filter Film Optical Density 5 8 x 8 Thousand Oaks Optical

$24.00
11d 20h 39m remaining

Solar Telescope Filter Glass Mylar 5 inch diameter
Solar Telescope Filter Glass Mylar 5 inch diameter

$40.00
17d 22h 26m remaining

Solar Sun Filter Sheet Telescope Binoculars Camera BLACK Polymer 6 x 6 Approx
Solar Sun Filter Sheet Telescope Binoculars Camera BLACK Polymer 6 x 6 Approx

$18.99
16d 4h 20m remaining

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

$28.50
17d 16h 36m 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

$15.20
17d 16h 37m remaining

Celestron EclipSmart Solar Filter for 127mm 130mm Refractor Telescopes 94222
Celestron EclipSmart Solar Filter for 127mm 130mm Refractor Telescopes 94222

$19.95
1d 14h remaining

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
11d 20h 39m 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
22d 20h 48m remaining

Celestron EclipSmart Solar Filter for PS127EQ 130SLT
Celestron EclipSmart Solar Filter for PS127EQ 130SLT

$20.95
14d 20h 1m remaining



« Previous12345...89


Tagged with:

Filed under: Eyepieces & Accessories