different filesize mutlipage tiff and sum of singlepage tiff

[Sven]

I want to convert several singlepage tiff in one multipage tiff (in batchmode on a hp-ux) with following command:
nconvert -o result.tif -out tiff -multi img1.tif img2.tif img3.tif
the conversation works without a problem, but the file size of the created multipage file ist much greater then the sum of the several singlepage tiffs.

Example:
four singlepage tiffs with a size of:
-54.513
-55.361
-54.126
-49.961
the created multipage file has a size of:
-1.943.446

That's approximately a factor of 10!
how can i prevent this?

best regards
sven

[xnview]

I want to convert several singlepage tiff in one multipage tiff (in batchmode on a hp-ux) with following command:
nconvert -o result.tif -out tiff -multi img1.tif img2.tif img3.tif
the conversation works without a problem, but the file size of the created multipage file ist much greater then the sum of the several singlepage tiffs.

Example:
four singlepage tiffs with a size of:
-54.513
-55.361
-54.126
-49.961
the created multipage file has a size of:
-1.943.446

That's approximately a factor of 10!
how can i prevent this?

Please use -c (compression)