someone please help me..

To me it looks correct. I may be wrong.

please someone tell me weather this is right or wrong.

When we get together, we won't forget to take a photo (so far, so good) in self-timing.

I don't know what you mean by 'in self-timing'.

I meant with the usage of self timing in cameras. (self timer cameras.)
Then is this way right teacher?

Why do you want to mention the self-timing? Its not needed. The following sentence is good enough.
'When we get together, we won't forget to take a photo.' or
'When we get together, we won't forget to take a photo of ours.'

if you really want to specify the self timer then,

aday' The following sentence is good enough.
When we get together, we won't forget to take a photo of ours.'

No, that sounds like running finger nails on chalk board to my ear. Ok, this may be off the topic. This sentense is not making good sense because of the way it was constructed. If my guess is

If by 'self timing' you mean using the self timer, try this:

"When we get together, it will be impossible that we forget to take a photograph using the self timer."

Gagan Preet BangarIf by 'self timing' you mean using the self timer, try this:"When we get together, it will be impossible that we forget to take a photograph using the self timer."

To me, the trouble with the OP sentence was because of the awkward word choices and the phrase " when we get together". The phrase is common and

I was worried about that, I was just preventing myself from totally transforming the whole sentence!
How is this:

"In the future when we meet, it will be impossible that we forget to take a photograph using the self timer on a camera"
or

The reason I commented on your thread was because you added more words into an unclear sentence, but it did not improve the context, only to make it sound more awkward.
"In the future when we meet, it will be impossible that we forget to take a photograph using the self timer on a camera"