UPDATE (5/19/22): Delkin has certainly confused and possibly mislead some of our customers with comments we recently made about our new line of BLACK cards. This act was not intentional in any way, and we are sorry to have frustrated some of our customers. We are engineers first…making the best memory products we can, and photographers second. Occasionally this fact has an ability to impact decisions and directions.Thank you to a great photographer for writing a clearer description of the performance of our new line of cards in the Nikon Z9 camera:‘Real world’ testing in the Nikon Z9 (good light, auto-ISO, wide-area AF (L) with auto subject detection, action in the scene, 1/800th, a lens designed for action shooting) has shown:Beyond the initial, 79 Frames of NEF (RAW), Lossless compression format at 20fps, the new Delkin BLACK cards can deliver an average frame rate of 15fps for another 20 seconds.Please note that the fps after the initial frames will be uneven, but overall, approximately 15fps will be maintained, so you can keep shooting with confidence.Also, please note again, that varying conditions can reduce the initial 79 frames slightly.Under the same shooting conditions, some of our top competitors struggle to capture 45 frames before dropping to 10fps and less!Even better, under typical real world conditions, using Nikon’s compressed RAW HE* format, the new Delkin BLACK cards can deliver 200 uninterrupted frames at 20fps, then can continue to deliver about 19fps for another 20 seconds. The frame rate will be slightly uneven, but overall, approximately 19fps can be maintained.If you use Nikon’s most compressed RAW HE format, performance is even better, very nearly providing an unlimited 20fps.Again, many thanks to Dave Armstrong for helping us research, analyze, and present this information. You can find his photographic work here: www.davearmstrongphotography.com