#How to use backyardeos iso#
Darks reflect the camera induced noise.įLATS – Place a white teeshirt in front of the scope just b4 sunset or at least later in the day, set DSLR to AV mode and aim for an exposure under 1 second mine were 1/180th and Flats records the uneven illumination of the image and can also record the dust within the camera.ĭARK FLATS – Same time duration as your normal flats (remember your ISO settings) but with scope cover on. Equally important is the focus, ISO and exposure time which must remain exactly the same as above. These should be grouped together – even renamed to reflect the exposure time and ISO level as these are extremely important when it comes to processing.ĭARKS or DARK FRAMES – This is the same as lights but with the scope cover on. LIGHTS also known as SUBS – These are the actual photos taken using a DSLR or CCD imaging camera. So ISO800 & ISO1600 will be the ones to choose – if conditions are perfect drop to ISO800 – if the moon is quite strong then select ISO1600 for a shorter duration capture and hence less light pollution. ISO3200 would considerably reduce the exposure time but again, the image noise might be too great. I would love to capture at ISO400 but the exposure times would be too long and sensor noise would be a real problem. I have obtained two sets of each, one for ISO800 and the other for ISO1600. Please note that all of these camera files are raw files – jpegs are compressed and lossy so of absolute no use whatsoever for calibration. IMPORTANT: BackyardEOS refers to each one of these calibration terms hence the reason for this little guide. Here, these calibration frames are explained in laymans terms – that way, I might understand it 😉
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