Originally posted by iss2012 I noticed that the exposure time is more than 120 s. How can you perform this ? is there an option on the K-30 to do it ? I though maximum exposure time was 30 s ..
Thats the Bulb setting in the shutter speed. somwhere in the settings you can adjust how you want to use it - i think the standart is - expose while shot buttton is pressed. you can switch it to start exposing by first press of shot button, and stop by pressing it second time.
the most easy and professional way is using IR remote - same settings press one time to activate, second, to stop shooting.
marco, did you order the IR filter or ND? The ND is used as usual, but IR can be a bit harder to figure out.
Short crash course into IR Photography -
The first and most important is White Balance. The incamera white balance will give you quite a nice results, you need to search for manual white balance, and then set it, pointing on some green grass or leaves in direct sun. depending on your camera you will get pictures with 2 different falce colors - you will already get good jpgs. if you want to go RAW, itīll be bit compicated.
The problem is Photoshop, and Lightroom donīt have big enough color range, and you just get some 50 shades of RED images. iīm working with Capture one pro, it gives me all the color range i need, so i just need to adjust some contrast and sharpening. later versions of lightroom may do it too, but iīm not sure. There are some more complicated ways to do it with photoshop - just google it.
Second - metering. forget it. the only camera which metered IR more or less accurate, was k3, otherwize you need just test it out. set iso 6400, and try 1/2 sec., 1sec, 2 sec, etc.
What do you get - look at the histogramm or at the picture if it looks fine for you, shoot a good picture with iso 100-200.
And now the trick - rule of 60. To get right exposure on ISO 100, you need the time from iso6400 x60. So 1 sec. at Iso 6400 becomes 1 minuit on iso 100 etc.
Third - Optical Viewfinder cap. The light comes throught the OV is not to underestimate. You need a cap, for it, or smth else just to keep it dark. same for any kind of long time exposures
now how do you proceed
1) find your shot.
2) set up tripod, or anything else to keep it stable for a long time.
3) put your camera on it and adjust the composition(Filters are dark as hell, so you wonīt see anything) / adjust focus - autofocus, or hyperfocal length, on manual lenses - and then switch the focus OFF!.
4) put IR filter on, The OV cap, go to manual WB(which you have saved before), iso 6400, 2 sec - get the right time for perfect exposure.
5) Set iso100 and right time x60, switch to remote and 3s mirror lockup.
it will take a while camera to save the picture - 2-5 minuits, so donīt panic.
have fun.