Is this a grammatically correct? - 1

"I'm sending back my camera to Nikon tomorrow."
"I'm going to send back my camera to Nikon tomorrow."

Which one is better?

Added (1). What is the difference between the two?

Both are same but there's a slight difference between these two sentense. Both r ok

Both are perfectly fine. The tenses are slightly different, but they end up meaning the exact same thing.

The best woudl be:
I'm sending my camera back to Nikon tomorrow.

The second one is grammatically correct, as the verb is in the future tense. The first one has a verb in the present tense and a subject in the future tense.

The second sentence could be the finest

This is better: I'm sending my camera back to Nikon tomorrow.

The Second sentence it grammatically correct, although the title is not! It would be *is this grammatically correct?* The second sentence is more formal. To make it more formal you would say I'm going to send back my camera to Nikon tomorrow.

The two tenses are slightly differing. The first indicates a definitive statement: you are in fact sending your camera back the next day. The second sentence indicates that something will either follow or precede the notion of sending the camera back because it is put into a future tense of 'going to do' something. You could also word it as, "Tomorrow, I will send my camera back to Nikon," or "Tomorrow, I'm sending my camera back to Nikon." These both inform the reader of the same idea, but offer said idea in a slightly different context. When all is said and done, any way you word it informs others that the camera is going back to Nikon.

They're both correct and mean basically the same thing--but the second one IS more emphatic.
I'm a native English speaker, so yes; this is true!

Personally, however, I'd write: I'm going to send my camera back to Nikon tomorrow.

Or you could say, "I'm going to return my camera to Nikon tomorrow."

I'm going to send my camera back to Nikon tomorrow - is the neatest.

The difference:

I'm sending - is present continuous tense - means you are sending it now this minute, technically, although it is used as in your first example all the time these days.

I'm going to send - is future tense which you should use if you are going to do it tomorrow. This is technically correct.

Hope you get it back in one piece!

I like, "Nikon will receive my broken stinking camera tomorrow because I sent it today! What the heck does my incorrect grammar have to do with anything." I'm so sorry, I had to get that out of my system. Go Red Wings!