This past week I received my new Bower 500mm Mirror lens. I understood fully when purchasing the lens that it would only be recognized by the camera in "M" manual mode and possibly "A" aperture priority. The D3300 will not recognize in "A", so manual it is. Part of the reason I purchased the lens was to force me to learn more about manual settings. My initial problem is this. I am using the lens with the rear 1A skylight filter as recommended in the small pamphlet. After a half hour of playing with different ISO and Shutter speed settings I was still getting "Washed out" images like the pictures were taken through white muslin. Even when my settings had the image slightly under exposed the image was dark and washed out. The lens is fine and the image was crystal clear in the view finder. I finally lifted the veil a bit when I changed the white balance back to automatic. Any Ideas on what I am doing wrong, or what setting I may need to adjust or change? And most importantly, why I need to change them so I can understand going forward. Thanks for any help.