Show us your subs!

[Knight of Clear Skies]

45 minutes ago, JOC said:

Yes, I've got a Canon T3 Rebel (which is an 1100D) and still have the Canon Utilities CD's that came with it.

You could also focus off the camera screen itself by selecting liveview, this is pretty easy to do if you use a Bahtinov mask and a reasonably bright star.

[JOC]

Knight of Clear Skies - I'll try that too then - I didn't know if a single bright star would show up sufficiently on the camera screen to do that, but you seem to suggest that would be so I'll give it a try - I'd love to contribute a photo to this thread.

[Guest Tuomo]

2 hours ago, JOC said:

Knight of Clear Skies - I'll try that too then - I didn't know if a single bright star would show up sufficiently on the camera screen to do that, but you seem to suggest that would be so I'll give it a try - I'd love to contribute a photo to this thread.

Remember to use zoom function in live view to get the best possible result.

[laser_jock99]

On 16/01/2017 at 15:38, symesie04 said:

Laser Jock im stunned at your single sub result crazy. Im also very impressed at how much fluffy stuff results from what appears to be zero nebula signal in the M45 shots.

My NGC7000 'Wall' image was an example of a sub being overexposed. Not ideal as it's noisy and results bloaty stars etc.

Ideally I'd be aiming to get lots of subs like this more sensible 150s NGC7000 and stacking as many as possible.

 

A process of the above single sub shows how much data is actually in there.

And the result of stacking 15x 150s subs- less noisy- possible to extarct more detail.

[iapa]

Bode's Nebulae M81/82, ISO 800, 300s. Modded Canon 600D, 80mm ED, guided AVX mount.

1. RAW image opened in Nebulosity 4 and saved as JPG for upload
2. RAW image opened in Nebulosity 4, stretched and de-mosaiced and saved as JPG for upload

Im not a good as the experts above so, not that much there - but proof there is something usually.

 

 

BODES_LIGHT_300s_800iso_+9c_20161126-04h15m24s880ms.tif

[Guest Tuomo]

Nice, there is something.

[iapa]

On 17/01/2017 at 10:52, JOC said:

Yes, I've got a Canon T3 Rebel (which is an 1100D) and still have the Canon Utilities CD's that came with it.

You need to use a USB cable to control the camera and see what is is looking at not the HDMI connector.

i can't  speak for the 1100D, but I expect  the EOS utility will allow you to see 'live view' on the PC screen - it does on the 600D/700D and 70D

one you can see on the laptop what the camera 'sees' you can focus in

[Victor Boesen]

Now for some widefields!

Nikon d3300, nikkor af-s 50mm, f/1.8g 6sec (8sec on m31+m33 and the shot with the milky way through cassiopeia) f/2.5 iso 800.

And that's it.

[spillage]

This is one of my subs from last night on the rosette nebula. 10 min sub without coma corrector or filters.

L_0060_ISO800_600s__8C.TIF

 

This is the same sub with a slight adjustment with canon digital photo pro and saved as jpeg.

 

needs loads more subs and probably someone who is better than me at processing. I also have some eggy stars and all sorts of issues going on. But here is my first attempt with 16 subs.

[Guest Tuomo]

Holy moly! I think I need to figure how to guide...

[Uranium235]

IC1805

Single 600s sub, raw:

Same image, three curves applied:

[symesie04]

Great thread this and very illuminating no pun intended. All we now is a sub repository so even those who dont have the ability to image could practice their processing skills.

[tooth_dr]

Here is a quick example of single sub versus 8 stacked subs.  All I did was bring up the levels on the sub to make it less white, no other adjustments.

 

[alacant]

Hi. Some amazingly clear and colour balanced light frames here. With an astro-modified Canon from a dark site this is what I get:

[tooth_dr]

59 minutes ago, alacant said:

Hi. Some amazingly clear and colour balanced light frames here. With an astro-modified Canon from a dark site this is what I get:

What exposure time and ISO did you use here and what scope?

[tooth_dr]

Here are a couple more completely unedited subs and final edited stacked images.

 

[Alien 13]

I have taken subs that are even more exposed than the examples above (almost white) and still got decent images out of them..

Alan

[alacant]

51 minutes ago, tooth_dr said:

exposure time and ISO did you use here and what scope

90s, 800, 254mm f4.7. But it doesn't matter. All the RAW images I take look similar. To make comparison useful, I think we'd all have to use the same camera, same software and in the case of oscs and dslrs, the same debayer algorithm.

Cheers and clear skies.

[tooth_dr]

7 minutes ago, alacant said:

90s, 800, 254mm f4.7. But it doesn't matter. All the RAW images I take look similar. To make comparison useful, I think we'd all have to use the same camera, same software and in the case of oscs and dslrs, the same debayer algorithm.

Cheers and clear skies.

Well I don’t know the technicalities! I just opened up the DSLR RAWs in PS, and saved as JPEGs.  They just seem pretty bright for 90?

[alacant]

47 minutes ago, tooth_dr said:

 They just seem pretty bright

Hi. Dunno. The RAW frame is just squares of grey, so when you open it in PS or your on-camera preview, you're looking at whatever has been done to it for human beings to make sense of; colour, brightness, contrast and while balance and WHY.

For me, colour is the most difficult impossible part of processing!

[tooth_dr]

6 minutes ago, alacant said:

For me, colour is the most difficult impossible part of processing!

I’ve found colour impossible to get right at times too. You see the M42 image was taken with a LPF, almost processed looking out of the camera. The other two are same exposure settings but without LPF. 

Anyways good luck with it all

CS

[Z3roCool]

Hi - only just started Astrophotography in Feb this year. Loving it. Only had a chance to get Orion and Andromeda and a few others but not enough time on them. Here are some subs on Orion - 5sec, 20sec, 60sec & 180sec - Taken with Canon 7D (Unmodded) & Canon 400mm 5.6 lens.

And then the final image. Stacked with about an hours worth of data and some darks.