I've used many 240s - my favorite list for 8x10 would look like this in order of preference:
1. 240mm Docter Germinar W - outstanding, sharp, contrasty and tiny with quite a bit of room for movement.
2. Sironar S - no real advantage over the Germinar except you can buy one!
3. Computar 240 - sharp contrasty and huge coverage
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