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Canon 750D / Rebel T6i an unfounded bad reputation?

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#1 SteveCollyer

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Posted 02 December 2023 - 05:22 AM

As a total beginner, I had no idea that this particular camera had such a 'mixed' reputation as far as AP went.  I'm not even particularly experienced at regular photography, to be totally honest.

So, I naively bought a used, astro-modified 750D from an established UK vendor, and was none the wiser.  Only later, as I got more immersed in the world of AP, did I realise my utter stupidity.

 

Make the best of a really bad mistake, was how I went in to this. 

I only used Siril along with Starnet++ for my first fumbling efforts at AP, no GIMP or Photoshop, just Siril and a free online noise reduction tool.

This was used in conjunction with a Star Adventurer Pro 2i

 

Here are my first 3 results as a total newbie, using the dubious(?) 750D

 

 

M31 original

 

 
M45 original
 
 

NGC 1909 original


Edited by SteveCollyer, 02 December 2023 - 05:27 AM.

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#2 Ru4scuba

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Posted 02 December 2023 - 08:05 AM

I have an old Rebel T5i and my main target this next year is Andromeda.  If I can get one half as good as yours...I'll be thrilled.  I had no idea the camera had a bad rap!

 

Great job!


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#3 BQ Octantis

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Posted 02 December 2023 - 08:30 AM

What authoritative source gave it a "mixed" reputation? You've already proven to yourself that you can produce astrophotos with it—and you haven't even shot a target that exploits the astromod! Your "dubious(?)" quote indicates you are doubting the claim.

 

Personally, I would pick a 700D over a 750D for its larger pixel size. But that's mainly for processing time and storage. If I had a 750D, I would use it for AP.

 

BQ


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#4 SteveCollyer

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Posted 02 December 2023 - 08:46 AM

Well I couldn't find anyone who had a good word to say about the 750D.  Seems it is always missing from people's lists of good AP Canons.  The only things I could find were all very negative.

 

I do plan on shooting objects that exploit the mod, but M31 & M45 were chosen to start for ease of capture, and IC 2118 was chosen because a) I think it's an especially cool object and b) I thought I'd give myself (and my kit) a bit more of a test.


Edited by SteveCollyer, 02 December 2023 - 08:47 AM.


#5 BQ Octantis

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Posted 02 December 2023 - 08:54 AM

In AP, I find good words are measured in images.

 

https://app.astrobin...ss-x8i-modified

 

BQ


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#6 sharkmelley

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Posted 03 December 2023 - 07:50 AM

Exposures from the Canon 750D potentially have stripes corresponding to the rows containing the auto-focus pixels.  Unfortunately, I've never seen any reliable information on whether or not these stripes calibrate out.  But even if they don't calibrate out, dithering during acquisition followed by sigma rejection during stacking should certainly prevent the stripes affecting the stacked result.


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#7 ChristopherBeere

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Posted 03 December 2023 - 05:35 PM

Check Todd Stephens out if you wanna see what a crappy old Canon APS-C DSLR can do.

 

Frosty has done stuff with an uncooled dinosaur APS-C that still blows my mind.

 

https://www.astrobin...sers/FrostByte/

 

In my opinion the best Dustbuster in the game, very talented imager.

 

Bottom line, fairly decent skies and a lot of dithered exposure.


Edited by ChristopherBeere, 03 December 2023 - 05:35 PM.

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#8 Ru4scuba

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Posted 03 December 2023 - 09:16 PM

In AP, I find good words are measured in images.

 

https://app.astrobin...ss-x8i-modified

 

BQ

Right?

 

Gives me hope I too can pull off a halfway decent shot with my T5i



#9 BQ Octantis

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Posted 03 December 2023 - 10:55 PM

Gives me hope I too can pull off a halfway decent shot with my T5i

 

Sure, why not? My even older unmodded 600D/T3i does a passable job in Bortle 6/7:

 

Sure Why Not? (click for full size)

med_gallery_273658_21104_1343176.jpg

Canon 200mm f/2.8L II @ ∅52mm, Canon 600D/T3i @ ISO800, 253×30sec

 

BQ


Edited by BQ Octantis, 04 December 2023 - 05:49 PM.


#10 SteveCollyer

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Posted 06 December 2023 - 02:56 AM

A couple of hours worth of break in the clouds gave me the chance to capture the rich star and hydrogen alpha fields in Cygnus.

 

Deneb to Sadr in Cygnus

 

Skywatcher Star Adventurer 2i Pro
Canon 750D (astro modified) ISO 1600
Samyang 135mm f2 (set at f2.8)

175 x 30 second lights
50 flats
50 biases
50 darks
I used Siril 1.2.0 along with Starnet++

 

Cygnus Deneb To Sadr V1


#11 sharkmelley

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Posted 06 December 2023 - 03:18 AM

A couple of hours worth of break in the clouds gave me the chance to capture the rich star and hydrogen alpha fields in Cygnus

It looks great.  I'm not seeing any evidence of the stripes related to auto-focus pixels.


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#12 BQ Octantis

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Posted 06 December 2023 - 03:53 PM

A couple of hours worth of break in the clouds gave me the chance to capture the rich star and hydrogen alpha fields in Cygnus.

Sweet! waytogo.gif

 

Glad you tried for yourself…

 

BQ


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#13 SteveCollyer

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Posted 09 December 2023 - 10:17 PM

Orion's belt & nebulae.
Plenty to see here, including the Flame Nebula, Horsehead Nebula, and of course M42 - the Great Orion Nebula.
Considering how low Orion is at the moment, and how windy it was when taking the subs, I'm very pleased with the end result.
Skywatcher Star Adventurer 2i Pro
Canon 750D (astro modified) ISO 1600
Samyang 135mm set at f2.8
343 x 30 second lights
50 flats
50 biases
50 darks
I used Siril 1.2.0 along with Starnet++
Stacking took 8m 8s.

 

Orion M42v1


#14 BQ Octantis

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Posted 09 December 2023 - 10:54 PM

Looking good…you're making great progress on your skillz! waytogo.gif

 

With that much integration time, I'll bet you've got a lot more data in the shadows. I got this with 15 minutes on the same target from my unmodded 600D/T3i:

 

Colorized M42 (click for full size)

sml_gallery_273658_7587_4409.jpg

 

BQ


Edited by BQ Octantis, 09 December 2023 - 10:55 PM.

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#15 SteveCollyer

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Posted 10 December 2023 - 04:24 AM

Looking good…you're making great progress on your skillz! waytogo.gif

 

With that much integration time, I'll bet you've got a lot more data in the shadows. I got this with 15 minutes on the same target from my unmodded 600D/T3i:

 

BQ

Cool image.

I wasn't clipping any blacks on my image & I was only using Siril for processing.

I'm not sure if I could ever get that much detail on a Samyang 135mm as it's a very widefield lens.  Well, perhaps I could if I spent several days on the target!


Edited by SteveCollyer, 10 December 2023 - 04:25 AM.


#16 BQ Octantis

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Posted 10 December 2023 - 08:05 AM

Cool image.

I wasn't clipping any blacks on my image & I was only using Siril for processing.

I'm not sure if I could ever get that much detail on a Samyang 135mm as it's a very widefield lens.  Well, perhaps I could if I spent several days on the target!

I used several iterations of very careful histogram manipulation in Photoshop. Not sure I could do it in Siril alone, though…

 

BQ



#17 asanmax

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Posted 12 December 2023 - 12:53 AM

 

As a total beginner, I had no idea that this particular camera had such a 'mixed' reputation as far as AP went.  I'm not even particularly experienced at regular photography, to be totally honest.

So, I naively bought a used, astro-modified 750D from an established UK vendor, and was none the wiser.  Only later, as I got more immersed in the world of AP, did I realise my utter stupidity.

 

Make the best of a really bad mistake, was how I went in to this. 

I only used Siril along with Starnet++ for my first fumbling efforts at AP, no GIMP or Photoshop, just Siril and a free online noise reduction tool.

This was used in conjunction with a Star Adventurer Pro 2i

 

Here are my first 3 results as a total newbie, using the dubious(?) 750D

 

 

 

Interesting, this is the first time I hear about the mixed reputation of the T6i. To me, it's a fine camera with a good sensor. I've just pulled a bunch of test dark frames taken with different T6i cameras and I couldn't find any issues.

Your images look pretty good. Am I missing anything?




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