Whats your settings to get that nice starry background with the laser? I usually go for 30 seconds @ f5.6 and ISO 1000.
In the 589nm shots I think I used 30 sec @f/8 and ISO 3200.
Your setting are close, just bump up the ISO a bit. :beer:
Wow just Wow, RB with all the recent caos its sure nice to see a beauty of a pick! This one is so so cool:beer
Thank you Sir, glad you liked them. :yh:
Hi RB astro would you mind sharing the model of the camera you are using? Also are there any disadvantages of long exposures? If not I am going to make it super long exposure to shot a super visible beam :eg:
I use both a Canon 7D MkII and also a 5D MkII, just depends on which one I grab first.
As for long exposures on a DSLR, no real disadvantages except that image noise starts to build up because the sensor starts to heat up.
You can't damage the sensor but it produces image noise in the photo which looks ugly.
This is where you need to use In Camera Noise Reduction (ICNR).
You set that to 'on' in the camera settings and what this does is the following:
You takes the images for x amount of time, lets say 3 min in 'Bulb' mode.
It then takes another 3 min image straight after the original but this time it blocks the light path and only takes the image of the noise generated by the 3 min interval.
Then it subtracts the noise image from the original image and you end up with a cleaner image.
The only disadvantage is that it takes twice as long to take an exposure.
You can't damage a sensor by long exposures so don't worry, they're designed for that.
Just know that the longer the exposure, the more noise it generates in the image, so use ICNR.
:yh:
As you can see in the pic, even with the lights on, the beams are exposed nicely and are uniform. This was taken using just a few puffs from my fog machine while doing test shots. Exposure was F10 ISO 125 at I would think 3 or 4 seconds, but I turned off the overhead lights after a second to let the beams expose longer
Beautiful image as usual Bruce.
:beer:
