... M45 Pleiades, 14Nov14, Northboro, MA . Canon 5D mark ii, internal CLS filter, 7000K in camera WB, 70-200mm f.2.8 lens + 1.4 extender, shot at 280mm focal length, ISO 1600, f/5.6, 50 seconds each x 119 images (99 minute total exposure). ... Post processing- 100% clarity added in Lightroom to stacked Nebulosity tiff image, added mask and text in Photoshop. Logon to post a follow-up comment or review comments from others . Copyright (c) Amateur Telescope Makers of Boston, Inc. ...