Got out to play today with my new Singh-Ray Mor-Slo 5-stop ND coupled with the Singh-Ray Vari ND. Set the latter at 7 stops, so was shooting at 12 stops. The exposure was about 3 minutes 15 seconds.
More an experiment in using the two NDs together than an attempt at fine art. However, any comments you care to make/critique you want to offer, will always be gratefully accepted.