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makes a HUGE difference
transaction was swift, shipping quick, items well packed. the purchase procedure left me quite content. I purchased the LRGB, and narrowband SHO, the 3nm for S and O, 5nm for H installed without problem into a ZWO EFW-8, I am not sure why Christopher had issues, mine install easily and fit as expected. no tricks needed. the difference to the midlevel LRGBH set the new filters replace is mindboggling. Contrast is way up, zero halos at 10min RGB, and 20min NB exposures on my F6 refractor. Yes they are pricey, but IMHO this is money very well spent. "if you can swing them, get them" Thanks