Corrected entry: Hank McCoy, for some reason, created Cerebro with the precise abilities to amplify Charles' powers and allow Charles to use it to locate other mutants, even though Hank would have had no idea that anyone could use the machine... It was even mentioned that the machine was pretty much useless without Charles.
Correction: It was built for a telepath, someone like Charles. They knew there were telepaths around so they built a machine but the machine needs a powerful telepath. Only Charles is powerful enough to use it.
Corrected entry: In the scene where Erik confronts Shaw on the boat, Emma's hairstyle changes from being down to being in a half updo right after Shaw chastises her for harming their own kind.
Correction: Her hair becomes down when in diamond form but before and after it is in a half updo.
Corrected entry: The televised newcast in the 60's is being transmitted to Shaw's submarine in pristine, practically HD quality.
Correction: Despite what you've obviously heard CinimaSins say about it in their recent YouTube video "Everything Wrong with X-Men: First Class In 8 Minutes or Less", there is nothing at all anachronistic with Shaw's TV reception. Nothing about it actually suggests HD quality in the first place and, considering it's military-grade technology just a few years before we received excellent footage all the way from the moon, there's no reason at all the reception shouldn't be perfectly clear on a submarine.
Corrected entry: Hank McCoy transforms into his beast form in X-Men First Class. However, in X-Men 2 when Mystique meets the guard in the bar, Hank McCoy, without fur, is speaking on a live talk show on a TV in the background.
Correction: Explained in X-Men: Days of Future Past. Hank devised a serum which enables him to revert to his human form temporarily.
Corrected entry: In First Class, Professor X is made handicapped in 1962 at the end of the movie. In the previous X-men movie, he was walking when he visited the girl (Jean) in the mid 70s with Magneto.
Correction: In the next sequel, "Days of Future Past", it is established that there is at least one method by which Charles Xavier can temporarily regain his ability to walk to short periods of time. It is very possible that he was using one of these methods while visiting the young Jean.
Corrected entry: When Banshee is showing off his power in one shot of the movie he destroys the window. In the other scene at the CIA center two of the guards are picking on Beast and he closes the blinds at the window.
Correction: It shows two areas that are identical. They moved to the other area where the window is still intact and there is no statue in the background.
Corrected entry: In the beginning of the film, Shaw gives young Erik a coin. This coin is a 5 mark Nazi coin dated 1934, yet the coin was only produced from 1936-1939.
Correction: The coins were produced from 1934 - 1939.
Corrected entry: When Erik is destroying Shaw's yacht with its own anchor, in the shots of the chain slicing the top half of the boat, the chain exerts a forward force on the yacht, but the boat is stationary. This is impossible considering it is floating in water and the slightest nudge would make the yacht move.
Correction: The yacht has a lot of mass and therefore a lot of stationary inertia. The water also creates a significant amount of resistance against the hull. As long as the amount of energy needed for the chain to slice through the yacht is less than the amount of energy needed to move the yacht, the yacht would remain stationary during the attack. Especially if Erik is holding the yacht still with his powers in order to make his attack more effective. If you think "the slightest nudge" is all that's required to make a boat that size glide through the water, I invite you to visit your nearest marina and just try shoving a few boats around.
Corrected entry: In the movie when Xavier is using CEREBRO for the first time keep an eye out and you can briefly see young versions of Storm (girl with white hair) and Cyclops (boy with soccer ball and dark sunglasses).
Correction: Not likely. The film is set in 1962. If those characters were intended to be Storm and Cyclops, they would be in their mid-40s in 2000, which is when the first X-men film was set. More likely is that they were simply generic mutant children.
Corrected entry: After Prof. X has been shot and is in Moira's arms, he moves his own leg in the background of Erik's recruiting speech.
Correction: With a spinal injury or severing of the spine, involuntary leg movements may occur following the injury and for some length of time. They run the gambit of movements from a slight intermittent twitch to actual leg bending at the knee and hip. These involuntary movements are beyond the person's actual control and have to do with the spontaneous firing of the nueral connections at the site of the spine injury, and, are well documented in the medical and diagnostic literature.
Corrected entry: When Magneto lifts the submarine, he is the point from which the submarine hangs. But Magneto is hanging from the jet, so basically, that is carrying the submarine. And there is no way a jet, even one that powerful, can lift a submarine in mid-air.
Correction: You're misunderstanding how Magneto's power works. If his body were the anchor, he would not be able to ride pieces of metal that he levitates; that would be like trying to pick yourself up by your belt loops. It's his power alone, not his body, that supports the objects he manipulates.
Corrected entry: Emma Frost can turn into diamond, which is the hardest material in the world, yet the Erik is able to use the bedpost, most likely made out of a soft metal, to both strangle and starting to crack her neck.
Correction: You're confusing "hardness" and "toughness", I'm afraid. Diamond may be the hardest material on Earth, but it's not actually that tough, in fact it's extremely brittle. If you wanted to scratch diamond, true, metal would be pretty much useless, as it's not hard enough, but if all you wanted to do is break a diamond, a good whack with a hammer will do the trick. A piece of metal, particularly one backed up by Magneto's powerful ability to manipulate such objects, would be readily able to apply enough pressure to make a few cracks.
Corrected entry: In the scene where Erik is in the bar in Argentina, after the fight starts the bartender says "Oye, cabron". From his accent it's obvious that he's supposed to be a native Argentinian, but the word "cabron" is never used in the Argentinian dialect - it's mostly used in Mexico and Spain.
Correction: This doesn't mean a person in Argentina cannot use that word. I know some American people that like to say "scheisse" even though it is a German word.
Corrected entry: Moira McTaggert, who has NO mutant powers to prevent her aging, is shown to be in her 30s in this movie set in the 60s. The X-Trilogy is set in the 2000s according to the novelization. That's a gap of 50 years, so Moira should be in her 70s in the trilogy. Yet, when we see her in X-Men 3, she's barely pushing 40.
Correction: First, she's never stated to be in her 30's in First Class. She could very well be in her 20's. Second, she's never stated to be in her 40's in X3, she could be much older, having merely aged gracefully. Finally, the novelization is not movie canon. It's a separate medium.
Corrected entry: Charles says when they are looking at the suits, that they have to wear them because they haven't mutated to endure g-force or being riddled by bullets. Yet somehow a deflected Walther PPK bullet, which is one of the smallest calibers out there, can go through the suit and still have enough power to paralyze Charles?
Correction: The suits certainly are not all over bullet proof, and Magneto may very well have sped the bullet on its way, rather than merely deflecting it, giving it more oomph. The bullet didn't kill him at any rate, so I'd say the suit did its job.
Corrected entry: In the scene in which Banshee jumps out of the Blackbird, the wings that Beast designed for him aren't on while he's still on the Blackbird, but they appear as he's gliding over the ocean. They're gone again once he's underwater and makes his sonic blast.
Correction: The wings of this wingsuit extend and retract via some unexplained mechanism from a harness strapped to his torso. The straps on his suit are visible at all times, whether his wings are visible or not, and they don't appear on anyone else's suit. Just like no one else has the disc on their chest that Havok has.
Corrected entry: During the scene with the SR-71 Blackbird, while Erik is on the wheel assembly, Professor X yells 'Hank tank my hand' several times. Hank is flying the plane. Erik is the one he is trying to save from falling.
Correction: He says Erik. Xavier's accent and the noise surrounding the scene just make it sound like he is saying Hank.
Corrected entry: In the scene in the Russian diplomat's bedroom, Erik tightens the bar around Emma's neck so hard that it cracks her diamond neck. Erik says that she can't become diamond again without dying. At the end of the movie, she shifts into diamond form and the cracks in her neck are gone.
Correction: Erik meant that he would kill her if she changed into her diamond form again. The cracks in her neck not reappearing imply that her diamond form can regenerate itself.
Corrected entry: In the end of X-Men: First Class, Magneto puts on his helmet to protect himself from Xavier reading his thoughts. In X-Men: The Last Stand, the pair go to visit Jean as a child and Magneto is not wearing a helmet, even though the setting is much later.
Correction: Apparently, they patched up their differences in the time in between the two scenes (as they have done, several times, in the comic books). Magneto would not necessarily feel the need to shield himself from Xavier when they are working together. In addition, it would attract all kinds of unwanted attention to walk around with that helmet on.
Corrected entry: Xavier and Magneto attempt to recruit Wolverine but, in the first X-Men movie Xavier has no prior knowledge of Wolverine, despite the fact that it is in the future.
Correction: Xavier apparently knew of Wolverine in the first X-Men movie but chose not to say anything about their meeting in 1962. He knows that Wolverine is very distrustful of anyone from the time before he lost his memory; telling Logan that they had met sometime in the past would only raise suspicions.
Corrected entry: The scene at the beginning is set at a German concentration camp in occupied Poland in 1944 (as annotated). Scientist Sebastian Shaw, who has observed Erik bending the metal gate through a window, calls the boy up to see him. On entering Shaw's office, the song "Non, je ne regrette rien" is playing. The song was written in 1956 and recorded by Edith Piaf in 1960.
Correction: The song playing in the doctor's office is actually "La Vie En Rose." This song wasn't popularized until 1946, so it's doubtful it would have been playing at that moment.
Corrected entry: In the original X-Men, Professor X says Magneto helped him build Cerebro, which is how Mystique is able to infiltrate the system. First Class contradicts this by having Hank McCoy create Cerebro and Magneto having nothing to do with it.
Correction: Hank McCoy invents, designs and builds the first prototype we see in the CIA base. The one under Xavier's mansion is clearly a different one. There's no reason Magneto couldn't have helped them [both Beast and the Professor] build that version during his stay in the mansion or even years later. Especially since he has powers which would come in very handy when manipulating large steel panels.
Corrected entry: Eric manages to move a large satellite dish a few miles away, yet in X2, while in the plastic prison there's plenty of metal within that sort of range.
Correction: But nothing in visual range when he's in the plastic cell; he needs to see the item he's moving in order to manipulate it - or be extremely close to it in order to sense it. He couldn't sense the overload of iron in the guard's blood (X2) until the guard was standing right next to him.
Corrected entry: Emma Frost's power besides telepathy is also to change to a diamond-like form, however this applies only to her, not her clothes, and all throughout the movie everytime she changes to her diamond form she appears to be naked, when she should look as a diamond but dressed.
Correction: At no point in the film is it established that this power does not effect her clothes. There's no mistake here, deliberate or otherwise.
Corrected entry: Alex Summers, AKA Havok, is the younger brother of Scott Summers [Cyclops] and is a teenager in the film. Yet in the 90s, when the first X-men was set, Scott was still a teenager when the Cuban missile crisis occurred in 1962, so 30 years between events.
Correction: Scott and Alex are brothers in the comics yes, but it is never explicitly stated that they are supposed to be brothers in the movies. They have the same last name, but no further details are given, therefore, no mistake.
Corrected entry: Near the end, on the island, Mystique changes into Shaw to command his peons not to attack her friends. She is wearing the correct outfit, despite having never seen Shaw dressed like this before.
Correction: Incorrect. She has changed into him wearing the outfit he had when she met him at the CIA base. The outfit with the red blouse and tie, not the one with all the buttons.