Jump to content


First light on modified Canon 1100d

Recommended Posts

Ok so here is my first light with my recently modified Canon 1100d.

Some background first. From a previous thread I asked for ideas on how to best test the cameras extra IR sensitivity.
It came down to IC1396 which has the Elephant’s Trunk nebula located within it.

Due to my location I fitted a basic Sky Watcher LP filter to the imaging train.
This is a visual filter so not designed for this sort of task but after taking some test shots it looked ok.
I will be looking to purchase an Astronomik CLS Clip filter soon…
Started imaging at around 11pm as it had only just risen above a roof, its elevation was around 31 degrees so not great.
Took 10 subs at 240secs and with an ISO of 800. I could see the subs getting better each time in that the Histogram was getting stronger to the left.
Finished off with IC1396 being around 37 degrees.

Whilst I was in the area I had a quick go at the open cluster M52 as well.
Only six subs of 120secs for this but a couple of things struck me. At first I thought I had some hot pixels in the subs. After stacking the nebulosity was even greater. After running a Plate solver on the image it turns out that Bubble Nebula and NGC7538 had photo bombed the image too!
Definitely recommend having a look at M52 as open clusters are not normally something I am very interested in but with the WO STAR 71 it seems to bring a lot of other items to the image which makes them more dynamic, well at least in my mind it does!

All in all I am pleased with the results. Not quite as much nebulosity as I was expecting but more on that below and nowhere near the level of some of the other examples on the SGL forum.


Firstly the camera is now acting like a star hoover! :grin:  I don’t think I have ever had as many stars in a single image.
IC1396 is vast and to be honest I didn’t really know where the Elephant Trunk was located so I just lined up Mu-Cephei (Garnet Star) in the centre and started imaging. Have to add that I am loving Live-View, it’s so much easier to switch on in Backyard EOS and move the scope in real-time rather than my previous routine of press the controller X amount of times in a certain direction and take a quick image to see if has moved to where I want!

It took me sometime to identify where the Elephant Trunk, so wide is the field of view of the WO Star 71. Clearly it is not visible (it’s right next to the Mu-Cephei) however there is other nebulosity and dark lanes within the image.
The post processing was done pretty quickly so I will rework this soon (went to bed at 2am so you have to forgive me!)
I wonder if I could have increased the ISO, perhaps the LP filter is taking detail away? Certainly more subs would have helped and the elevation in a Light polluted sky did not help. I tried a 10min image and let’s just say the results were not pretty…
Enough waffling. If anymore has any tips, suggestions or comments then that would be great.

IC1396 is on the left and M52 is on the right.



Edited by Droogie 2001
  • Like 4
Link to post
Share on other sites

Are yes I see it now! That's annoying I moved the scope to the left, clearly I should have left it where it was...Never mind it was only really a test.

But yes I was expecting a bit more red but with all of the factors like the visual LP filter and number of subs felt this maybe the reason. I am sure I switched the camera to the correct settings, though will check again tonight.

Link to post
Share on other sites

it's a good start, IC1396 is fairly faint.

This is it I did a few nights a go.

I did 5minute subs at f/2.8 with a Canon EF 200mm L lens

Excuse the processing as it was quite low down and I'm not going to bother to much with it.

This is 14 subs and my guiding was messing around.


Link to post
Share on other sites

Well done, that's a nice looking starfield with the trunk peeking out on the right hand side. Not a great deal of nebulosity showing as you say but the LP filter will be blocking some of it (not sure how much) and you're also fighting against a lack of full astronomical darkness.

  • Like 1
Link to post
Share on other sites

Very nice. I quickly checked the specs on the Sky Watcher LP filter and it does appear to allow the IR/ HA wavelengths through so it does not appear to be blocking anything but you never know...I think the next attempt will be without a filter to see if this helps.

Link to post
Share on other sites

I found IC1396 to be quite faint even from a fairly darkish site. Something like Rosette is much, much brighter.

Taking longer subs is the way to go...and as mentioned it isn't getting truly dark until very late.

Link to post
Share on other sites

Thanks Stuart that's good to know. I am going to have another crack tonight. An extra minute on the subs and more of them with out the LP filter. May as well try whilst we have some clear nights and the moon is not too intrusive.

Sent from my iPhone using Tapatalk

Link to post
Share on other sites

Ok now you peaking my interest. Will take another set of subs of M52 and then move onto the North American nebula around midnight. I have always tried to view the nebula but my skies are too LP'd so it will be interesting to see what happens...[emoji3]

Sent from my iPhone using Tapatalk

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Recently Browsing   0 members

    No registered users viewing this page.

  • Similar Content

    • By VilleM
      Hi! I shot this during six diffrent nights in March and April. I had to throw lots of subs out the window due to high clouds but I managed to pull off 13 hours of good quality data from those nights.

      Technical details:
      SkyWatcher Esprit 100mm f/5.5, ZWO ASI1600MM-C, SkyWatcher EQ6 guided with ASI224MC, TS Optics LRGB and Baader narrowband filters.
      Ha 60x300s, OIII 32x300s, SII 53x300s, R/G/B 10x120s. Total integration time is ~13 hours.

      Larger image can be seen on my blog. www.evenfall.space/post/the-elephant-s-trunk-nebula

    • By alexbb
      This is one of the first targets I shot and was happy with since the beginning of my astrophotography journey
      Almost 4 years later, I decided to shoot again this nebula, this time with better gear and traveling to darks skies for most of the data.
      Even though it resembles the old image's colours, this new one is more accurate from the real colours point of view.
      Most of this nebula is made of ionized gases which emit light at certain wavelengths. Most of the emission of the hydrogen comes out as deep red, whilst oxigen emits a blue-green light mostly.
      But, besides the emissions in this area, the region here contains also dark nebulae (dust blocking the light behind) and reflection nebulae (easily visible at the trunk's tip).
      Named by its appearance in visible light as Elephant trunk, it is also described by many as a lady with long hair seen from the back.
      This whole region spawns over more than 3 degrees on the sky at over 3000 light years away. In comparison, the moon seems only 0.5 degrees wide.
      Another star in this show (pun intended) is Herschel's Garnet star, or Mu Cephei, the brightest star in the image. It's about 100000 times brighter than our sun and it's also one of the largest known stars. Its radius is larger than the orbit of Jupiter around our Sun.
      I started capturing data for this image early this year and ended this summer. I shot 2 panels in order to capture the whole area and I exposed more than 40h in total. I've been quite inactive lately unfortunately.
      You can watch the image at full resolution on astrobin or on Flicker.
      And the old image here.

    • By MartinFransson
      This has been my project since the start of this season and now I think I´ll just leave it... for now 😉
      I started last season (with a longer FL) but didn´t like how my Baader O3 filter matched the Astrodon Ha filter, so now I had to get a 3nm O3 as well.
      This is a total of:
      60*5 minutes of 3nm Ha
      114*5 minutes of 3nm O3.

      Shot with a ZWO ASI1600MM-Cool and a Canon 300/4L IS tele lens. The lens suffers from bad star shapes in the corners but I managed to get it decent anyway. Didn´t want to stop it down from f/4 either.
      Combined as a semi-RGB (or what to call it) from R=Ha, G=70%O3+30%Ha, B=O3. Processed it as LRGB using a combined Lum from 60% Ha L and 40% O3 L.
      I am really happy that I finally feel satisfied with a target! Usually I just get restless and move on when half of the data is collected.
      Hope you like it!

    • By widotje
      Here's my take on IC1396, let me know what you think.
      In total 7.5 hours exposure time using narrowband Ha, Sii, Oiii.
      Post processing in photoshop and lightroom.
      Thanks for watching, clear skies!

    • By Lead_weight
      I shot this over 6 nights. We had an amazing go of clear nights in a row. Now it's all rain until next week. But while it was clear, I managed two nights per filter on my newest scope. A total of ~ 760 3 min images. I think the total imaging time was 37.8 hours. Shot it through my newest scope the RedCat 51mm. It did well, but could have used a belt focuser. I managed to get one together from Moonlite, but only just after imaging this. The scope was able to hold focus a good bit of the night, but the quality curve looked like a swan dive towards the end as the scope lost focus at the end of the night each night. I got out my old trusty AVX to manage the aiming parts of the setup. Guided by an old Orion SSAG I had lying around and a recently acquired ZWO Mini guide scope since it matches the RedCat so well. But I think I'm going to need to swap out the guide cam for something with smaller pixels. Overall though, it worked.  Main camera was ZWO ASI 1600 MMC. I used 5nm Astrodon filters.

  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.