Ngc253

peter_4059 (Peter) · #1 14-10-2007, 12:42 PM

Had another go with the DSI at NGC253 last night before the clouds rolled in. This time I saved image in three formats (JPEG, FITS and TIFF). I suspect Envisage is not saving the TIFF format properly but the FITS worked. This is 100 x 8 sec images stacked on the fly.

Lee · #2 14-10-2007, 12:56 PM

8 second exposures??? What aperture scope are you using??? Looks great for such short exposures!

dcalleja · #3 14-10-2007, 03:52 PM

Peter
What DSI model are you using? Nice image for such short exposures

peter_4059 (Peter) · #4 14-10-2007, 04:29 PM

This was taken with a DSI pro II with a 10" GSO f5 Dob on an EQ6 mount. I haven't worked out how to use the long exposure yet and since I don't have a guide scope I'm quite impressed with the software alignment that Envisage does.

ballaratdragons (Ken) · #5 14-10-2007, 04:34 PM

Onya Peter.

Keep pumping that DSI

See how far you can push without guiding (15sec, 20sec,). Envisage will reject them from the stack if they get star trails.

peter_4059 (Peter) · #6 14-10-2007, 06:01 PM

Thanks Ken. I notice you have a DSI - is it the monochrome version and do you have any RGB imaging experience with it?

Peter

ballaratdragons (Ken) · #7 14-10-2007, 06:02 PM

Quote:

Originally Posted by peter_4059

Thanks Ken. I notice you have a DSI - is it the monochrome version and do you have any RGB imaging experience with it?

Peter

Nah, I've got the basic DSI-c.
It is the colour version, old model. I am only just learning how to use it myself.

h0ughy (David) · #8 14-10-2007, 09:54 PM

hey thats a good result given the data

Ric · #9 15-10-2007, 02:22 PM

Hi Peter, a very sound result with 8 second subs. I'm sure you should be able to push to 12-15 second images with no real problem.

Looking forward to seeing more.

peter_4059 (Peter) · #10 15-10-2007, 06:43 PM

Ric,

I haven't worked out how to use the long exposure mode - have you?

Ric · #11 15-10-2007, 07:22 PM

Hi Peter, I am currently imaging in Alt/Az and work of the scopes tracking which gives good imaging up to around 30 seconds before trailing of the stars sets in. with my scope I need a wedge and go equatorial for longer exposures.

I also use the Drizzle mode and save in Fits3p. That seem to work the best for me when processing in either MaximDL or AutostarIP