# Amateur telescope eyepiece filters

• Stargazing

## Main Question or Discussion Point

So, I have a relatively small (6") Orion Dobsonian with a 25mm and 7.5mm Plossl eyepieces and live in a somewhat light polluted area. Because of this, I am considering purchasing an eyepiece filter to reduce light pollution and enhance nebula/planetary viewing. I was wondering how this would affect my viewing with my eyepiece's and their eye relief. Also, I was wondering if these filters really are effective enough to enhance the details with my scope. Here are the filters I'm considering:

http://www.telescope.com/control/ac...-narrowband-light-pollution-telescope-filters

http://www.telescope.com/control/ac...on-mars-observation-telescope-eyepiece-filter

Those will both work great. Don't forget to get a variable polarizer as well to darken the moon as well. On sale now at Orion for $37.95. Great value IMHO. These filters screw onto the bottom of your eyepiece and won't affect your eye relief. They lengthen your eyepiece by a quarter inch or so but that shouldn't cause any issues. Last edited: Chronos Science Advisor Gold Member Filters are a good option for moon photography. For nebula, extending your tube will help a lot with light pollution without sacrificing aperature. All you need to do is tape about a 2 foot piece of rolled up parchment paper to the end of your scope. Spray paint the inside flat black. Filters are a good option for moon photography. For nebula, extending your tube will help a lot with light pollution without sacrificing aperature. All you need to do is tape about a 2 foot piece of rolled up parchment paper to the end of your scope. Spray paint the inside flat black. I've gotten great pictures of the moon and planets, I wasn't even considering nebula photography. Is it really as simple as taping a piece of paper to the end of my scope? chemisttree Science Advisor Homework Helper Gold Member No, it isn't by my experience. You aren't going to be doing much nebula photography with a dob mount unless you can convert it to a tracking mount. The rolled up paper will only cut stray light entering from relatively close sources like a streetlamp. Skyglow will be entirely unaffected by that light shield. For nebula, try a nebula or OIII filter as well. http://www.astronomics.com/main/product.asp/catalog_name/Astronomics/category_name/RV21A4CMAMU09N7NUM1WK2VX46/product_id/ATBB1" [Broken] for about$50 that works pretty well.