Canon is 5d mark iv purple patches

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kulu400

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So currently having a bit of a saga after shutter broke on my 5d. It was under warranty so today was sent a replacement. Tested it on some shots in garden and there’s a weird purple tinge almost psychedelic. I then went in street and in better light against lighter background it actually looks fine. But then went back to darker background and purple is still there. I’m guessing it’s sensor ? It can’t surely be a setting ? I did think memory card but the light shot is fine. I will add pictures.
 
The first 3 show the purple tinge. The shot in better light is clear. And definitely nothing to do with lens.
 

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This is also really weird. If I go to edit on phone it goes even more purple.
 

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Just wondering if anyone had any thoughts on this. Overnight I had a feeling might be corrupted SD card. But checked this morning and isn’t.
 
No expert here, so please take my remarks with caution.

I'd check they haven't messed up your colour balance settings (but just as a precaution, I don't think that is likely to be responsible).

I seem to recall that the sensor of a digital camera is behind some filters - I think there is a UV/IR one which they remove in a conversion to an infrared camera. If they had missed something out, might that explain it?

You might be able to test that theory by comparing a shot of a plant outdoors (even if it is a bit cloudy), versus indoors illuminated by flash. If the outdoor shot has the weird colours, that might confirm it is responding to infrared.

The fact that in your sample shots it is the leaves of plant that have this colour shift, seems to support an IR problem, because almost glowing foliage is a typical feature of IR photographs.
 
What you have shown appears to be isolated to under exposed foliage areas. NB can you confirm that the 5D is the original i.e. not the mk2 or above?

As this is a second hand body there is no way of knowing specifically what a previous owner did to the various settings. Therefore I suggest you do a camera reset to return it to 'out of box ' condition and that should eliminate any oddness as a result of the previous owners settings.
 
Resetting the camera. ...

Support

support.usa.canon.com support.usa.canon.com
 
Thanks for feedback. It’s not just the leaves that are weird. If you look at the building it’s on the windows pipes. The camera is a replacement sent by a 2nd hand dealer. So I’d presume they would have reset everything to factory settings. Looking over the settings everything looks to be at default setting.

And did say in title it’s the Mark iv.
 
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I dont think thats an IR conversion, the sunlit leaves look fine. I'd be guessing and say the sensor or processer have an issue. Personally I'd be returing it and shopping elsewhere if i'd had two duds from the same dealer.
 
I’d send it back too. The cause of the issue could also be:

1. Sensor Damage or Improper Sensor Alignment
  • Since the shutter was recently replaced, it’s possible the sensor was affected or misaligned during the repair.
  • Test: Take RAW + JPEG shots in the same lighting conditions and review them on your computer. If both formats show the color cast (especially in RAW), it’s likely hardware-related.
2. Sensor Heat Damage or EMI Interference
  • If the camera was refurbished quickly or handled improperly, it may have developed a sensor heat spot or electromagnetic interference affecting the color channels.
  • Test: Shoot a uniform grey card or white wall in even lighting at different ISOs and compare results. If color shifts persist only in shadows, this may be the issue.
 
kulu400 said:
Thanks for feedback. It’s not just the leaves that are weird. If you look at the building it’s on the windows pipes. The camera is a replacement sent by a 2nd hand dealer. So I’d presume they would have reset everything to factory settings. Looking over the settings everything looks to be at default setting.

And did say in title it’s the Mark iv.
Click to expand...
Ah! my apologies for missing the version number in the title :(

IMO you can never assume that a dealer has done a factory reset. . ....as I once had someone look me up and reach out to me, having found my inadvertently left copyright info left in a camera. Thereafter I did a factory reset before selling.

So IMO it cannot hurt to do a factory reset just in case that corrects the issue?!! As you have nothing to lose by doing so (on the surmise that you have records on 'your changes').
 
swanseamale47 said:
I dont think thats an IR conversion, the sunlit leaves look fine. I'd be guessing and say the sensor or processer have an issue. Personally I'd be returing it and shopping elsewhere if i'd had two duds from the same dealer.
Click to expand...

TimHughes said:
I’d send it back too. The cause of the issue could also be:

1. Sensor Damage or Improper Sensor Alignment
  • Since the shutter was recently replaced, it’s possible the sensor was affected or misaligned during the repair.
  • Test: Take RAW + JPEG shots in the same lighting conditions and review them on your computer. If both formats show the color cast (especially in RAW), it’s likely hardware-related.
2. Sensor Heat Damage or EMI Interference
  • If the camera was refurbished quickly or handled improperly, it may have developed a sensor heat spot or electromagnetic interference affecting the color channels.
  • Test: Shoot a uniform grey card or white wall in even lighting at different ISOs and compare results. If color shifts persist only in shadows, this may be the issue.
Click to expand...

Other than further tests to clarify it's issues.....I would concur that it should be returned for a refund. Two bodies in row with faults is a bad omen for whatever reason from that unnamed supplier :(
 
Just to clarify it’s 2 separate cameras. The first camera usage was pretty acceptable I had it for 18 months and took a lot of shots so tbh was expecting it to go this summer so was no surprise. I do mainly fashion and can shoot 500-800 shots in a day and summer is very busy.

The dealer essentially is not a camera specialist so if something breaks under warranty they tend to offer a refund to its today value or a replacement. So this was a completely different camera.

I’ve used this outlet as they are good prices and offer a 2 year warranty, which is now 5 years which is totally crazy on a used camera. But you live and learn going forward I’ll definitely use a more camera specific outlet.

I actually had 3 options after shutter on original broke which had been a great camera. Get it repaired probably £300/400, get a new/used mark iv £700/800. Or take the replacement which cost £0 and I still had 6 months warranty. Seemed a no brainer decision however in hindsight haha.
 
kulu400 said:
Just to clarify it’s 2 separate cameras. The first camera usage was pretty acceptable I had it for 18 months and took a lot of shots so tbh was expecting it to go this summer so was no surprise. I do mainly fashion and can shoot 500-800 shots in a day and summer is very busy.

The dealer essentially is not a camera specialist so if something breaks under warranty they tend to offer a refund to its today value or a replacement. So this was a completely different camera.

I’ve used this outlet as they are good prices and offer a 2 year warranty, which is now 5 years which is totally crazy on a used camera. But you live and learn going forward I’ll definitely use a more camera specific outlet.

I actually had 3 options after shutter on original broke which had been a great camera. Get it repaired probably £300/400, get a new/used mark iv £700/800. Or take the replacement which cost £0 and I still had 6 months warranty. Seemed a no brainer decision however in hindsight haha.
Click to expand...
If you rely on your gear to contribute to your living (based on what you say.....I surmise you are talking about paid work?) then what you say about your buying process on secondhand kit, speaks of being "penny wise but pound foolish"

Yes, if you hit lucky it works out but if goes wrong it just costs more in time spent sorting it out and ultimately paying that bit more?

By reputation MPB is one outlet to give serious consideration to.
 
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It might be a full spectrum conversion or the IR filter in front of the sensor has something wrong with it. Try it on auto white balance (no adjustments) and compare it to the pictures half way down and in the right hand column here:

kolarivision.com

Choosing The Perfect Infrared Filter - Kolari Vision

Learn more about infrared filter choices we offer, their pros and cons, and which one is the right for you. Everything you need to know in one place!
kolarivision.com kolarivision.com

Trees let quite a lot of IR light through their leaves (like a giant soft box) so it might be the purple in the shadows is IR light. It only shows up in the darker areas because in direct light the normal light dominates. IR will mainly show up on a sensor in the red and some in the blue band, making purple.

I guess a full spectrum conversion is probably the opposite of what anyone would want for any commercial fashion work.
 
Yes my guess is something to do with IR.

Although in future I’ll definitely check somewhere like MPB.

I must say it does seem really weird that the picture taken in better light looks perfect there’s not a hint of anything wrong.
 
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