5D first pic - Page 4

[1ponders] (Paul) · #61 03-01-2006, 07:24 PM

They were a bit sharp. The masking technique I'm using also seems to act as an unsharp layer mask. I've still got to work on it a bit.

Edit: I went back and redid the mask. I think that part of the problem is that your jpeg is only an 8 bit image and after I mask the original there is information lost that becomes obvious when I stretch it in level and curves. I've included your first tarantula image after gradient removal and the histograms as I processed the image.

[1ponders] (Paul) · #62 03-01-2006, 08:35 PM

Bert this is the levels histogram from your original image for comparison.

avandonk · #63 03-01-2006, 08:51 PM

The Carina shot was overexposed especially if raw to tiff is only 8bit. I'll wait until I have PS that can handle 16bit.

If you want the original Raw files can send them by snail mail.

Bert

avandonk · #64 05-01-2006, 07:54 PM

Tried processing at 16bit,works much better. I still have a lot to learn. I used GradientXterminator for the vignetting.
The Carina pic 4X180s ISO1600 300mm F2.8 in camera noise reduction Hutech LPR filter, stacked with Registar.
LMC 6x1min +6X2min+6X3min ,stacked with Registar,ISO 1600 LPR filter 300mm F2.8

1.8M
http://users.bigpond.net.au/avandonk/Car_16_1.jpg
1.8M
http://users.bigpond.net.au/avandonk/LMC_16_1.jpg

Bert

[1ponders] (Paul) · #65 05-01-2006, 08:49 PM

I noticed a big difference in image quality when stretching levels and using curves, after I switched from using 8bit jpegs to 16bit tifs. Using photoshop makes to old laptop grunt and groan though

RB (Andrew) · #66 05-01-2006, 09:54 PM

Editing in 16 bit mode makes a big difference.

tornado33 · #67 07-01-2006, 12:06 AM

I love that eta carina shot with the LPR filter. I must get my 6 inch F3.6 Schmidt Newt out and try for Eta carina with the 2 inch UHCS filter

Though as I dont have an off axis guider for the 6 inch I cant do the 10 min + shots I like doing with the 10 inch without getting flexure based guide errors.

Itchy · #68 07-01-2006, 07:43 PM

Hi Guys,

Bert sent me some RAW files from the 5DH. He also sent some flat frames for his 300mm f2.8 lens. So far I have only processed his 4x60sec Orion shots. Here is the result when corrected with the flats. With such a large sensor, I figured it could take a crop too.

I am stilled stunned with the sensitivity of the camera.

.

beren · #69 07-01-2006, 08:06 PM

WOw