Try increasing gamma if dark sections aren't distinguished

Try increasing gamma if dark sections aren't distinguished

Monday, October 1, 2018

sunspots in white light vs hydrogen alpha

Here's an image of a sunspot grouping comparing the standard "sunspot" visual filter image with a hydrogen alpha image:
Active solar region 1/11/2015 Ha vs white light




Here's a time lapse in Ha, nothing too dramatic, but there is some motion. 
Ha time lapse 1/11/2015 23:04-23:26 UTC
Imaging details/discussion:
found this one clearing out the hard drive
Ha close up Lunt 60 PT single stacked, on grab & go alt-azm mount, zwo asi 120mm-s
time lapse 19 frames over 22 minutes

the white light capture was done with an 8" SCT, baader photographic film with and without an IR/UV cut filter. the IR/UV cut filter improved contrast
20 second capture
FPS (avg.)=138
Shutter=2.869ms
Gain=73


2 comments:

  1. is it possible to calculate the speed of the motion? does it match what's expected?

    ReplyDelete