I have not been able to get items focused with the 90 degree attachment. No problem with through the lens staright...

There is probably dirt in the camera that restricts operation, the other concern is damaged gears, camera is trying to focus.

Your angle unit is set to degrees. If you do not change the Xmin and Xmax window dimensions to say -180 to -90 for Xmin, and 90 to 180 for Xmax you will not see much of the features of the graph; In the default interval Xmin, Xmax the curve is a staright line.

Double check to make sure that the camera/lens is not set to manual mode. The next item would be to check would be to clean the contacts of lens, where it attaches to the body. Try the camera with another AF-S lens. It may be that the autofocus unit on the lens has stopped working.

Try cleaning the contacts on the lens and camera with a lint-free cloth and IPA

That was a very sad thing to happen. There is no quick fix solution for this. You should take it to an authorized service center. But I fear this is not going to be an inexpensive process. Let them have a look and assess the damages. We have no way of judging what could have happened inside--whether there has been any misalignment of elements or focusing mechanism.

there are 3 types of telescopes:
1)refractor, uses lenses
2)reflector, uses mirrors
3)catadioptric, uses both

try this and practice doing this during the day time, it's easier.

get your eyepiece, the one with the highest number on it (# mm); this is your lowest power eyepiece, always use this first (wider view and easier to see where you're pointing it), and place it in your telescope.

next, use the focusing knob to focus on a target (a faraway tree, lamp post, etc.). once you have it focused, and if you want to get a closer look, get the next highest number eyepiece and refocus on the target. this is how you change magnification.
if you have a barlow lens (2x or 3x) this will also change the magnification by 2x or 3x without having to buy other eyepieces, although you can still buy more.
put it together in this order:
eyepiece-->barlow lens-->telescope

use the star diagnal for land viewing.

if you have a reflector telescope,
the open part of the telescope tube next to the focuser points to your target. focus it the same as above.

oh, and sometimes, with refractors, you might have to use the
45 degree or 90 degree diagnal to focus the telescope.

and google how to use a telescope. there's nice observing tips :D

hope this helps :D

oh, and check out the moon at night. it's a very nice target.
best time to observe the moon is when it's not full.
you gotta check out the 'terminator' (area on the moon where the light and darkness is separated.

first, use the lowest power eyepiece, that's the one with the high number on it with 'mm' after the number.

for a refractor telescope (uses lenses), you might have to add a diagnal lens (either 45 degree or 90 degree, whichever one you have) to focus on an object.
attach it in this order:

low power eyepiece-->diagnal lens-->main telescope

for a reflector telescope (uses mirrors, a telescope with a big tube with a mirror at the bottom and a focusing knob on one side of the tube). the open part of the tube points to your target.

hope this helps :D

If the Phoenix lens is autofocus (AF) in Nikon mount, it will work with the D90. You may find that you want to switch to manual focus when you are using it for macro shots for better control of focus. It will still set exposure properly when set to manual focus.

Your 28-90 AF-D lens can't autofocus with the D40, which requires AF-S lenses with a focus motor in the lens. Sigma lenses with "HSM" (HyperSonic Motor) in the name also have the focus motor.

kmarcum,
Take the camera off auto focus,if the shutter fires and you can manually focus, then the lens must be repaired. Take the lens to a camera repair shop and get an estimate.