Coma reducer for scope with 1.25 focuser

I use an old 1980's era Brandon 80mm triplet with a 1.25" focuser (see old S&T add picture). The only imaging I've done with this scope has been with 35mm film or a small chip CCD camera. With the advent of Comet Holmes I tried imaging with a Canon Rebel DSLR and got: great images, but with considerable coma in the corners and left/right side of the images. Looking around for coma reducer lenses I don't see an easy solution for a scope with a 1.25" focuser. Everything seems designed for 2-inch. Has anyone "solved" this, or have a suggestion for a cheap/simple solution?

George N

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>>Everything seems designed for 2-inch. Has anyone "solved" this, or have a suggestion for a cheap/simple solution?
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George:

I suspect that what you are looking for is a Field Flattner rather than a coma reducer... The need to flatten the field is quite common in small refractors...

Jon