I recently tried to capture a set of astroimages at 15 sec. intervals over a period of 1.5 hrs (using an intervalorometer). I should have captured nearly 560 images. But when I downloaded the images to Bridge there were only 210. Looking at the Bridge information there is an additional 18 sec between the Date Created date/time and the Modified date/time. This 18 sec. per image accounts for the difference between the expected number and the actual number. But where does it come from and how can I account for it in the Intervalorometer settings.
Tried reformatting the card and that solved the problem. I'll probably purchase a new one as added insurance. Thanks for all the help - really appreciate it.
I took the timer out of the equation and just shot 30" in Manual Mode. The same results - it took 30 sec. to write a 30MB image to the card. I tried variations in ISO, shutter speed etc. and it appears it takes the same amount of time to write to the card as the image size (i.e. 1MB/s write speed!). Not a problem with faster shutter speeds but can be impactful for multiple long exposure astroimaging like skyscapes or meteor capture.
I took the timer out of the equation and just shot 30" in Manual Mode. The same results - it took 30 sec. to write a 30MB image to the card. I tried variations in ISO, shutter speed etc. and it appears it takes the same amount of time to write to the card as the image size (i.e. 1MB/s write speed!). Not a problem with faster shutter speeds but can be impactful for multiple long exposure astroimaging like skyscapes or meteor capture.
John is correct about using Bulb mode. What brand of card are you using? It sounds like it could use a reformatting.
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Tried reformatting the card and that solved the problem. I'll probably purchase a new one as added insurance. Thanks for all the help - really appreciate it.
