I have not been in that area recently. If the signs are as confusing as you claim, it may be worth it to contest it. However, another commenter says that the camera and lower limit are clearly marked, so it's up to you whether you truly think you didn't have appropriate warning.

For what it's worth, going 41 in a 25 zone is potentially very dangerous. "The average risk of severe injury for a pedestrian struck by a vehicle reaches 10% at an impact speed of 16 mph, 25% at 23 mph, 50% at 31 mph, 75% at 39 mph, and 90% at 46 mph. The average risk of death for a pedestrian reaches 10% at an impact speed of 23 mph, 25% at 32 mph, 50% at 42 mph, 75% at 50 mph, and 90% at 58 mph." (source).