Using scope adapters with filters (1 Viewer)

Do most of you use a filter on the camera before screwing on the adapter? If you do, I would be interested in what would be the best all around filter so that I could leave the adapter on the camera as the nikon will be used strictly for digiscoping. Thanks.

Hi K.C. You can use a filter with an adapter..... but it will increase vignetting as it's pushing the camera lens further away from the scope's eyepiece.
On an adapter with a direct 28mm thread, you could probably put up with the extra vignetting, on an adapter with a 37mm thread you will already be using a 37-28mm step ring to get it to fit to the Nikon lens thread.... so an extra filter will makes matters even worse.
If you're intent on getting a protection filter.... buy a UV filter.
Regards,
Andy

Thanks Andy, It's not like I am heck bent on using a filter. I wasn't really sure whether it was a good idea or not. So you have answered my question.
I am going to go ahead and order the adapter eagle optics sells which screws on directly to the nikon lens. It's a bit pricey but it looks like a fairly simple devise.

Is the glass on my 990 not a filter of some sort? the flat piece of glass where the threads are is not the camera lens, which is actually further inside the camera. I figured it was just a uv filter.

You're correct about the front glass of the camera's being just a protective cover. I think this is mainly to prevent dust getting into the mechanics of the lens.... as this cover is fixed and non-removable, it's not much use if it gets scratched.
The good thing with protective filters (uv/skylight) is that they can be damaged and replaced cheaply and quickly by the user.
Andy