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I started in Bortle 8 Melbourne skies, then added the CLS, then spectrum modified my 450D, then added a UHC, then bought the STC dual. All of these steps are improvements visibly in each image. The STC is a step up from UHC but totally superior to CLS, which is twice the contrast on naked sensor. The filters don’t change colour cast on modified DSLRs-only on unmodded ones.
Exposure times are not longer when using narrow filters. You’re just able to expose for that long without swamping the sensor with skies glow.
If you pick up noise on a 6 min exposure, either do more subs or get a better camera, maybe with cooling or focus on the winter months.
Clear Skies!
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