M8 at 2900mm

[Peter Ward]

Originally Posted by Paul Haese

Nice Peter, buuuuut, have you considered getting a flattener or reducer for that RCOS? The field curvature really stands out...

Thanks Paul...but re:field curvature... are you kidding?

The edge stars look perfectly round to me

[Peter Ward]

Originally Posted by iceman

I reckon there's more of that field you're not showing us.. like the Uluru pic

Nice one Peter!

Ta.

Ok you got me, the frame has been cropped a tad (bottom right is the real edge...there is evidence of a teeny bit of camera tilt)...but no more frames exist yet....they are on the "to do" list.

[richardo (Rich)]

Vanilla or not Peter, it still is a very nice image!
Good colour and nice defined detail along the HII ridges.
very natural.
Yes, it is a good pick of objects when you want to get a great object in in one night especially when the weather is fickle.

Jeez, some hard markers around these days LoL
I can see that on a whole there is a very slight elongation to the stars toward the 1 0'clock position but as you mentioned, camera tilt. (pretty much a nit pick though)
Stars look good right out to the edges that I can see.

Rich

[Peter Ward]

Originally Posted by richardo

Vanilla or not Peter, it still is a very nice image!
........

Rich

Thanks Rich....

....I guess there are times when a only a full-cream vanilla ice cream, (not some tasteless low-fat version) will do

[Bassnut (Fred)]

At 1st was thinking, thats a bit WW for 3900mm, but its the big cam doing the damage of course ;-) . Excellent then. Cropped interesting bit pics for impact would be the go now, I cant always be bothered zooming in on a casual view.

[Peter Ward]

Originally Posted by Bassnut

At 1st was thinking, thats a bit WW for 3900mm, but its the big cam doing the damage of course ;-) . Excellent then.

Thanks Fred, but it was 2900mm... The big chip is quite difficult to keep orthogonal but the self guide works a treat

[stevous67 (Steve M)]

Hello Peter,

It is simply a beautiful image, a nice range of contrast and depth of colour.

Do you mind sharing your exposure break down for each filter including sub lengths? That would be helpful, especially considering saturation looks just right for this field size. I am terrible at over cooking things.

Bye,

Steve

[Peter Ward]

Originally Posted by stevous67

Hello Peter,

It is simply a beautiful image, a nice range of contrast and depth of colour.

Do you mind sharing your exposure break down for each filter including sub lengths? ........
Steve

Glad you liked the image.

10 minute subs are my "standard" ( about 70:10:30:20:30 mins of HaLRGB ) The Ha blend was very mild...probably only about 15%.

That said you will find there is a vast range of difference between sensors. For example, DSLR's CMOS are notorious for saturating all stars to white if care is not taken to avoid burn-out (i.e use shorter subs as required). Hope that helps.

[stevous67 (Steve M)]

Thanks Peter.

Steve

[Paul Haese]

Originally Posted by Peter Ward

Thanks Paul...but re:field curvature... are you kidding?

The edge stars look perfectly round to me

Yeah maybe you are right Peter, was a little tired when I looked at this. One thing is for certain the image is very sharp. Maybe it was just tilt. Sorry, I am concentrating on stars of late. With all the stuff I went through to get my PME working properly I guess I am a little bit obsessed with star shape of present. Nice anyway.

[Peter Ward]

Originally Posted by Paul Haese

Yeah maybe you are right Peter, was a little tired when I looked at this. One thing is for certain the image is very sharp. Maybe it was just tilt. Sorry, I am concentrating on stars of late. With all the stuff I went through to get my PME working properly I guess I am a little bit obsessed with star shape of present. Nice anyway.

No drama Paul. Another effect that is easy to mis-read is close binary systems... There are more than you think and they often look eggy!

[gregbradley]

Peter does the STX have little thin shims under its faceplate like the STL?

Perhaps you can shift them around to compensate for the tilt or sag. I can push my Proline up a bit by about 1mm so there is a tad amount of sag there (I think its from the FLI adapter or the FLI filter wheel wall which is a bit thin). These cameras are heavy and they hang out there quite cantilevered.

Greg.

[Peter Ward]

Originally Posted by gregbradley

Peter does the STX have little thin shims under its faceplate like STL?...

Greg.

No... but it's a moot point as the tilt changes with various scopes I use. Frankly I find the effect too small to really fuss over. That might change if an AO ever gets released for the STX ...

[Gem (Grant)]

Wow! Nice to see a popular object still looking good!