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Originally Posted by Striker
I have read Jim's soloman cookbook...well tried too...At this stage of my astrophotography I found it to be very difficult to understand....maybe I am just reading into it too much....I would like to think what other feal about this Iris process regarding doing flats.
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Tony:
I have been following Jim Solomon's recipe every single time since I started using IRIS and it works fine..
couple of cautions...in the new version of IRIS kappa sigma stacking works (in his cookbook Jim talks of a bug, but that I think has since been fixed)
also in general I like the add_norm command rather than straight add, it seems to work better
and savepsd2 seems to work well when you finally save to photoshop (instead of that complex process Jim describes to save to Photoshop).
Conceptually processing in IRIS is quite straightforward:
- convert RAW to a Pic file
- Apply flat field and subtract darks
- convert to 48 bit
- register
- stack
- set black point and adjust colour balance
- stretch-using asinh command-I love this command
- save to photoshop
There's heaps of other commands for power users but the basic set needed to do the steps above are pretty much what I need 95 % of the time
give it a go, I think you'll be pleasantly surprised at what it can do
I need to add that the procedure Jim describes to take flat fields did not work for me for a flat without filter..worked Ok when I had a filter in the optical train..not sure why need some experimentation to find out
seriously think a light box a la Eddie T is the way to go (See Eddie's fine article if you have not already)
