vdb

6 minutes ago, ollypenrice said:

Is there a mono version? I don't know.

In comparing my NAN and Trunk-to-Bat HaLRGB images with Yves' result I noticed two things: his Ha has actually gone deeper than mine and there is something about the way the Ha emerges from the gas and dust which is more progressive and natural. His camera has give a 'look' which I like very much indeed. And in 90 minutes per panel.

Olly

Of this camera there is no mono version, there is a backlit full frame the QHY600 that has a mono version, but frankly I do not see the need, knowing you have all 3 colors in one go with rich deep reds (I use the Idas D1 filter) is so relaxing. And you can do Ha/OIII in one go with those new Dual band filters .... it’s not as good as a mono camera, but the difference is negligible in my option ...

/Yves

Capturing, about 2 new moon’s processing hard to tell, ones figured out to go about a day, but a week going back and forth as combining such a large set is not trivial.

/Yves

Olly did a terrific job in combining this data set, I took a different approach to this 32 mega panel madness. To be perfect I need to revisit about half of the panels ... now I need to find the courage to do so.

Trunk to Crescent by Yves, on Flickr

Color correction:

M81v2 by Yves, on Flickr

After a remtote HD crash (NVMe???)

an easy target to get everything back up and running.

RC 8 inch / AP 0.67 reducer /ASI 183 / 300x5min LRGB

M81 by Yves, on Flickr

Thanks! It's at Olly's place, that's why a OSC camera works, dark skies make a OSC perform almost equal to a mono.

/Yves

FSQ 106 / RD 645 / QHY 128C

IC348 by Yves, on Flickr

FSQ 106 / RD 645 / QHY 128C 58x5min

IC443 by Yves, on Flickr

FSQ 106 / RD 645 / QHY 128C, 2 panel 80x5min total time

V2 Used APP to do stretch and LP removal, better overall color balance.

M78-Part of Barnard by Yves, on Flickr

Layered in 30 sec core frames and brought out more the background

M42-IC434 by Yves, on Flickr

M42- IC434 2 panel, FSQ 106 / RD 645 /QHY128C. 66x5min in total

M42-IC434 by Yves, on Flickr

Align channels in APP and less saturation makes the corners much better ...

M31v3 by Yves, on Flickr

5 minutes ago, gorann said:

Yes, certainly stunning!

I am a bit curious about the apparent blue/red miss-alignment or cromatic aberration that I see when I look closer at the star field. Do you know what may cause it - the reducer? It does not spoil the overall impression and I am sorry for pixel peeping.......

You just need to stop pixel peeping, it's a full frame sensor with a reducer, the slightest focus drift or tilt will introduce this. I know it's your hobby, it was mine too some years ago 😉, I moved on.

/Yves

I've been reading diagonally this thread, so I'm confused now 😄 

I'm on the verge of reducing my Tec 140 with the AP reducer to F5, I have a 3.7 micron camera ... or do I keep it at the native focal length ... The camera is sensitive and backlit OSC CMOS. Reduced it is 1.1 arcsec native 0.78 ...

/Yves

How far can you go with pure OSC camera.

FSQ 106/RD645/QHY128C 240x5min

M31v2 by Yves, on Flickr

4 hours ago, Tom OD said:

That's a beauty Yves. I like the bright look and the colours of the browns are excellent.

Thanks, I hesitated to make it more dark and maybe I should up the contrast a bit, but by keeping it light it shows depth ...

5 hours ago, alan potts said:

A totally stunning image you have created there. Would you tell me in brief how you join frames as a mosaic, I would like to try say the NA Neb but can't fit it into my FOV at 800mm.

Alan

One word: APP, best software to do mosaics, in this case I stacked all the FSQ frames in one stack! the GSO RC needed to be stacked in 4 different panels, the result of the panels was then stacked again in APP.

Just follow the instructions of Sara W.:

https://www.astropixelprocessor.com/how-to-create-a-mosaic-in-easy-steps-by-sara-wager/

/Yves

Blood, Sweat and Teers. 

4 Panel Mosaic in the FSQ 106 + RD 645 + 128C QHY

+ 4 panel Mosaic for squid GSO RC + ASI 183 astrodon 5nm OIII

The exposure details are:

134 x 5 min in total for the 4 panels of the FSQ wide field

312 x 5 min in total for the 4 panels of the GSO RC Narrow field 

Squid-VS-Bat-VS-Elephant Trunk by Yves, on Flickr

My Biggest mosaic to date in pure RGB which is kind of challenging, Ha this is easy, RGB madness to even try.

16 panel Mosaic, FSQ 106/RD 645/QHY 128/Mesu 200. 15x5min per panel

Mosaic Nan to Crescent by Yves, on Flickr

Was not happy with the "magenta" cast ...

M63-lrgbv3 by Yves, on Flickr

I struggled with this one, L is much to strong ... part of the solution was to take more Red subs, this camera is more sensitive in blue so I could not get the balance to make sense, but even then it was still difficult to process.

GSO RC 8 inch, AP 0.67 reducer, ASI 183, 250x5min LRGB subs

M63 by Yves, on Flickr

Even if it works, I would return it (if no HW fix is offered), today you image with a FSQ 106, tomorrow maybe a Tec, that is a complete different scale ...

And these issues become only worse not better, so in 6 month's from know the play could be so bad that even FSQ territory is a no go.

So either they have a HW fix/retrofit or they accept returns.

/Yves

These formula's will help you to calculate how accurate one needs to be aligned ...

On Polar Axis Alignment

Yves