Startrails in Illinios

Please see my previous post "startrails above camp" for details on the event location. In my TIFF based photos the startrails are smooth. When I save the image as a JPEG I loose the smooth trail. What going on? (BTW - this not an issue when the image is printed using a "large" JPEG or TIFF).

Attached Image:

:S I forgot to add tha this image is

donald Boyd said:

Please see my previous post "startrails above camp" for details on the event location. In my TIFF based photos the startrails are smooth. When I save the image as a JPEG I loose the smooth trail. What going on? (BTW - this not an issue when the image is printed using a "large" JPEG or TIFF).

I forgot to add the details. This image is a stack of 35, 30 second exposures, FL: 18mm @ f4.5, ISO 400, produced using CS2. I used a Canon XTi w/ Canon EF-S 10-22mm f3.5-4.5 USM lens.

Really really nice!!!
Ivan