Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: Will this fit the Nikon D5100?
Document: This is a darn nice viewfinder. The fact that it is a fraction of the price of Zucato and the like is icing on the cake.For Nikon D800 users:  Yes, it fits. But not the way I would prefer it to fit. I mounted the base plate, centered on the body. After mounting the viewfinder, I noticed it did not want to stay in place.
I attached this to a Nikon 800E without any issues at all. It is built sturdy with clean and sharp optics, easily adjustable to fit the camera, and uses a metal clip to hold the eyepiece in place when you don't have it flipped up. A nice huge rubber eye cup accomodated my glasses perfectly so I didn't have to take them off. A dense foam edge goes around the body part that touches the camera's viewer so it doesn't get scratched.
This accessory is more than my expectation. It is very well made and snugs perfectly on my Nikon D800E. 3x enlargement on the viewfinder is a boon. It is a fantastic product.
I would recommend this device to anybody with a camera without viewfinder. I tried 2 other brands but this one is superior!And it's adjustable, so it will also fit my next camera.
Great product. Very solid construction, not flimsy, worth the value. Totally adjustable for a good fit and easy to remove if required and switch between applications. Great for outdoor conditions when using live view for videos in bright conditions. Eyepiece has a diopter to adjust for different visions.
I solved this by moving the base plate rearward - closer to the back screen. It doesn't stick out, but it isn't centered on the body. Not a big deal, but not a "perfect" fit. But a darn good fit, overall.With that out of the way, I've found that it really helps steady the camera. In fact, I'm stopped using my shoulder mount rig. I really didn't expect that.
It looks great attached to the Nikon, doesn't look cheap or plasticky. It's solid and locks in place very well. All the connectors are metal. I just ordered another one for Camera B for my weekend shoot, and now I have one for my students to practice with while I demo the first.Great buy, great product. :)
Since a good Arca-Swiss style base plate costs about $65, this viewfinder is an amazing deal. The plate is heavier than a RRS, and the fit and finish are not as good. But the RRS stuff is amazing, so I can't fault GGS for that. The finish is good, and over all I'm pretty happy with it.Bonus - that huge eyecup works even when I wear glasses! Now, that is a big damn deal for me.Get it.
why spend more? this guy works a treat. my only gripe is sometimes it blocks the buttons so u have to find that happy medium between the multidial and the left hand row of buttons. I have a Nikon d7000. But does the trick. Save money, forget that carryspeed and go GGS. they're both swivi anyway. The only other thing is the baseplate kinda sticks out if you have a neoprene case, but thats not a biggie
I bought this for my primary Nikon D800, because I was having difficulty focusing my videos without an external monitor, and sometimes that's not practical. Also, unlike with TV lenses I grew up with, you can't always zoom these photo lenses to get an accurate focus, and have the focus be accurate when you zoom out. That's all changed now. This 3x magnifier has allowed me to focus my videos in live view mode without the usage of an external monitor.
Answer: I have no idea. I own a Canon 5D Mk lll and it fits thatSo you can look up the specs on 5D and cross refrence.