Ngc 6188

[Peter Ward]

O.K. subject matter has been touched on before....but here's my H-alpha take on it....

The link is here

[Craig_L]

Lovely detail, contrast and a three-dimensional feel for only 80 mins.

[Paul Haese]

Start of an interesting image. Well detailed.

[troypiggo (Troy)]

Aaaaand, that's how it's done, ladies and gentlemen.

[iceman (Mike)]

Stunning!

[dvj (John)]

Very sharp to the extreme corners. Now that's a scope that appears to be working right out of the box.

[Peter Ward]

Originally Posted by dvj

Very sharp to the extreme corners. Now that's a scope that appears to be working right out of the box.

Thanks John.. I needed to shim the camera faceplate a touch, but otherwise have been very happy with the scope.

Originally Posted by iceman

Stunning!

Ta Mike

Originally Posted by troypiggo

Aaaaand, that's how it's done, ladies and gentlemen.

Well, gee,

Originally Posted by Paul Haese

Start of an interesting image. Well detailed.

Pondering colour...but rain this morning doesn't make me hopeful

Originally Posted by Craig_L

Lovely detail, contrast and a three-dimensional feel for only 80 mins.

I look at it this way:"only" 80 minutes with the RHA is like 320 minutes with the six inch...a much deeper exposure would not have revealed much more detail, but would have pulled down the noise a bit.

[Stevec35 (Steve)]

Very nice Peter, particularly for only 80 minutes. Pity you couldn't get NGC 6164/6165 in. Mosaic?

Cheers

Steve

[Peter Ward]

Originally Posted by Stevec35

Very nice Peter, particularly for only 80 minutes. Pity you couldn't get NGC 6164/6165 in. Mosaic?

Cheers

Steve

Ta Steve. Lack of time as usual, but weather permitting...will look at mosaicing out to 6164

[gregbradley]

A stunning 6188 for sure.

Greg.

[Peter Ward]

Originally Posted by gregbradley

A stunning 6188 for sure.

Greg.

Feed-back appreciated. I'm now seriously thinking "needs colour"

[Mighty_oz (Marcus)]

Originally Posted by Peter Ward

Feed-back appreciated. I'm now seriously thinking "needs colour"

You bet ! LOL Very nice effort as usual. I too have to add that other nebula ? bit

[Phil Hart]

Originally Posted by Peter Ward

Thanks John.. I needed to shim the camera faceplate a touch, but otherwise have been very happy with the scope.

Pic looking nice and sharp indeed. Had SBIG calibrated the sensor alignment in the 16803 in the factory before you started tweaking it with the shims?

Phil

[Peter Ward]

Originally Posted by philiphart

Pic looking nice and sharp indeed. Had SBIG calibrated the sensor alignment in the 16803 in the factory before you started tweaking it with the shims?

Phil

Ta Phil. As a matter of fact, yes, all "big chip" SBIG cameras have their CCD orthogonality set. I've personally seen the calibration bench.

However, small errors in the CFW, 3.5" adapter and focuser all add their part after that. The total error (~5 micron) would probably go un-noticed with smaller sensors and/or slower optical systems.

[gregbradley]

Originally Posted by Peter Ward

Feed-back appreciated. I'm now seriously thinking "needs colour"

You should, it has the potential of being a best ever.

Greg.

[RobF (Rob)]

Stunning vista. Please tell me you've used some high pass filtering or other contrast enhanching processing on just the central "wavefront" however Peter? (worried you'll say "no" most likely). Such incredible tight detail in that central zone courtesy of RHA.

[multiweb (Marc)]

Another corker! The contrast is mind blowing. I can't believe the stars for 40min subs. That's unheard of.

I think you might have a very slight rego error on the top right of the field. Doesn't look like a drift but more like a guiding jump. One small star next to a fatter one. Unless they're all doubles but it seems to be a pattern.

Just noticed pixel peeping the original for a half hour with an older shot of mine seeing how much of my blurry stuff matched your incredible details.

Anyway your shot motivated me enough to get out and image it again last night for the 100th time.

[Peter Ward]

Originally Posted by multiweb

I think you might have a very slight rego error on the top right of the field. Doesn't look like a drift but more like a guiding jump. One small star next to a fatter one. Unless they're all doubles but it seems to be a pattern.

Thanks for the feedback Marc....Im away from home for a few days, but looking at it with my iPad...yes! Looks like a guiding...or possibly registration stuff up. Will investigate next week!

[Peter Ward]

Originally Posted by RobF

Stunning vista. Please tell me you've used some high pass filtering or other contrast enhanching processing on just the central "wavefront" however Peter? (worried you'll say "no" most likely). Such incredible tight detail in that central zone courtesy of RHA.

There is a little global sharpening due MaxImCCD's DDP filter kernel....which I normally avoid, however it worked OK in this instance....But..sorry to disappoint, I didn't apply a local filter to middle bit....just a few global curves and layers.

[stevous67 (Steve M)]

Originally Posted by Peter Ward

Thanks for the feedback Marc....Im away from home for a few days, but looking at it with my iPad...yes! Looks like a guiding...or possibly registration stuff up. Will investigate next week!

You guys have bionic eyes. I can't see it. Looks great to me.

Steve