Before I moved to a DSLR, I have tried a couple of prime C mount lenses for some testing deep sky imaging with my DMK, but now since I already bought a DSLR, I am wondering how can I use these C mount lenses effectively.
The longest C mount lens which I had is a Cosmicar 150mm f3.2, and I believe that it's fast and long enough to guide my longest DSLR lens which is a Canon 200mm f2.8L! Given the Cosmicar is so fast, I believe that guide stars are readily available especially when used with a monochromatic DMK camera!
Time to really test this concept.
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