basically Ken if you think of the ToUcam as a 6 mm eyepiece and the 300 D as a 30-35mm eyepiece. Sorta Kinda. The big downer about using multiple barlows to achieve a similar FOV to the ToUcam is you will increase your f ratio to such an extent that you will have to image much much much much long to achieve similar results.
If you like the FOV of the ToUcam then you might be better off grabbing the DFK. It has the same size chip as the ToUcam.
See here for image example with the DMK. The DFK is the colour version. That isn't the one that Dennis is using. He is using the DBK bayer camera. While the Bayer is a colour camera it is differnt to the purely colour camera.
The DMK is seriously brilliant for a relatively inexpensive uncooled camera, but I would imaging you would like to steer away from having to do RGB combining. That is why I suggest the
DFK 21F04. It is much more like the ToUcam than the other two. I don't know if the DFK 21F04 is being sold in Aus but it is $100 cheaper than the DFK 21AF04.AS. The first one only does 30 fps and the second 60 fps. For DSOs that won't matter. I know Bintel have the DBK for $500, but you could get the DFK 21F04 from OS for $260 US
Something to think about.
I think you would really like it
