avandonk
08-12-2007, 09:40 AM
Another clear night!
Large Image 2.6MB
http://members.optusnet.com.au/~trlee8/LMC_85mm.jpg
Details
Canon 5DH. Canon 85mm F1.8, Hutech LPS filter, all at ISO500.
At f/2.8, 10X(2min, 4min, 8min )
At f/4 , 10x( 30s, 1min, 2min)
Converted from RAW to TIFF and corrected for flats with ImagesPlus. Stacked and aligned wiith Registar. Used EasyHDR to produce a LDR image from these five images. The potential dynamic range displayed is better than seventeen bits.
I am going to have to shim the lens as the stepper belt is pulling it slightly to one side. You can see this as the stars on the left are a bit out of focus compared to stars on the right.
Bert
Large Image 2.6MB
http://members.optusnet.com.au/~trlee8/LMC_85mm.jpg
Details
Canon 5DH. Canon 85mm F1.8, Hutech LPS filter, all at ISO500.
At f/2.8, 10X(2min, 4min, 8min )
At f/4 , 10x( 30s, 1min, 2min)
Converted from RAW to TIFF and corrected for flats with ImagesPlus. Stacked and aligned wiith Registar. Used EasyHDR to produce a LDR image from these five images. The potential dynamic range displayed is better than seventeen bits.
I am going to have to shim the lens as the stepper belt is pulling it slightly to one side. You can see this as the stars on the left are a bit out of focus compared to stars on the right.
Bert