Moon too large in wxAstro capture

[Super Hans]

I'm sure someone will tell me that the answer is glaringly obvious, but I'm stumped lol. I'm using an 80mm refractor (focal length 400m if that's important), and with a 25mm lens I can see the whole of the moon and the surrounding sky, but when I fit my webcam straight into the diagonal and open wxAstro capture I can't fit the whole moon into the frame?? The attached picture is one I took tonight and I could only get about half the moon in shot.

The chip is 640X480 if that matters.

The quality isn't amazing so I'm planning on getter a better cam, but for the life of me I can't work out what I'm doing wrong, so any suggestions would be much appreciated. Thanks. 

[jambouk]

You are not doing anything wrong; the chip is too small to fit the whole image of the moon on.

You could easily do a four panel mosaic of the moon; it is so easy even i have done one.

Jd

[Langy]

Your webcam is picking up a certain focal point within the scope as it replaces the EP.

Now someone who actually knows about this will tell you how to get over it. I suspect that you need some for of glass (lens) in there to reduce the image size to allow you to get a smaller image on the sensor.

[Super Hans]

Doh!!! I didn't even think of that. Thanks 

[oldpink]

I had the same thing
looked at the moon with my 25mm in and had it nicely in full view with a bit of space around the edge
dropped my camera in and I could only see a small part of the moon

my new camera (600D) should solve this issue as it has a much larger sensor area

[Super Hans]

Cheers for the replies fellas  The Mrs has picked me up another webcam today with a bigger chip that I'm now halfway through modding, but with the wind and rain at the moment I wont be using it anytime soon lol.

[Astrosurf]

I always do mosaics, and then use Microsoft ICE to merge them. It does a great job. Others use iMerge.

You've made a good start. Well done!

Alexx