StarTools

Hi, I just downloaded a trial version of the software, and liking it a lot so far.
I have used several programs in the past, when I was shooting with cooled ccd camera's.
I no longer use those, but occasionally I will use a regular camera with my telescope. One is a Sony A7rII (yes I know about the star eater) as well as a Pentax K-1.
Now the software user manual tells me to use linear data from the camera. With my Canons in the past I could do that with Digital Photo Professional, but I do not know how to create a linear tiff or fits file from my Sony or Pentax. Can somebody here point me in the right direction to do that?

Thanks very much,

Peter

Hi Peter,

When you stack photos in a programme such as DeepSkyStacker or whatever you may use, assuming you do, the result file would automatically be linear.

richard

Hi Richard,

Thanks for your answer. So even when the input Tiff has a curve applied to it, this is still the case?

Hi Peter,

What stacking programme do you use? The resultant tiff should not be stretched and linear means there is no curve applied. I use DeepSkyStacker. I believe you can view it stretched but there's an option to save it unadjusted.

Cheers Richard

I have a few that can do that including DSS. But if you insert a nonlinear tiff and output a linear tiff, isn’t that sort of backward engineering?

Hi Peter

Once you stack all your raw images your result is linear. As far as the science is concerned, I welcome other comments as I'm out of my field here. Sorry I can't be of more help!

Cheers

Richard

Hi Richard, tried dss this afternoon. I didn’t realize it could read my raw files directly. So you were right, got my linear files now.