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Thread started 08 Sep 2009 (Tuesday) 00:57
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Xti to 50d? Need better performance in low light

 
ChrisBreeden
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Sep 08, 2009 00:57 |  #1

I have an Xti and am really ready for an upgrade. Since the Xti cannot go over 400 iso without exceedingly noisy results in low light situations I have to shoot at VERY long exposure. These is especially difficult with models. What I am wondering is how much of an upgrade is a 40d or 50d in situations like this. Do they perform noticably better at higher ISO's. Thanks for the help.




  
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lawlz_xD
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Sep 08, 2009 01:01 |  #2

I'm not sure about the 50D but I made the jump from the XTi to the 30D and ISO use is pretty good up until 1250, I'd image the 40/50D would have better ISO performance than the 30D if anything.




  
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alessandro2009
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Sep 08, 2009 01:56 |  #3

ChrisBreeden wrote in post #8603362 (external link)
...I have to shoot at VERY long exposure. ...

You need:
1) a good tripod
2) minimal ISO
3) maximum aperture of the lens
4) use Bulb
Nothing more, nothing less.




  
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gcogger
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Sep 08, 2009 02:10 |  #4

The noise on the 50D is much the same as the XTi IMHO. If you shoot JPEGs (rather than RAW) you might find the 50D applies more noise reduction in-camera but there's nothing to stop you doing the same to the XTi images in post processing.


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ChrisBreeden
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Sep 08, 2009 03:10 |  #5

alessandro2009 wrote in post #8603502 (external link)
You need:
1) a good tripod
2) minimal ISO
3) maximum aperture of the lens
4) use Bulb
Nothing more, nothing less.

I have and do all of those things but as I said It's hard to get a model to stand completely 100% still for anything over 10 seconds. If I shoot anything above 400 ISO the noise is completely out of control. If the 50D's noise is just as bad as an Xti's at 800 then I find that very disappointing. :cry:




  
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KCY
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Sep 08, 2009 03:23 |  #6

have you considered getting a flash instead? and then you could also play with different lighting aswell?


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Chrazer
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Sep 08, 2009 03:27 |  #7

It is not possible to mention noise and the 50D without invoking controversy. I went 400D to 50D an for me their is no argument the 50D is better. A lot has to do with the high density sensor and 100% views on screen. The controversy was however more between the 40D and the 50D and never between the 50D and an earlier Rebel.

That said ISO 1600 will not really be all that good for you (only you can really say) and a 5D classic will probably serve you better since fast AF is not an issue given what you have written. A used 5D is not all "that expensive"




  
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petersmart
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Sep 08, 2009 03:46 as a reply to  @ Chrazer's post |  #8

I'm not sure why you say the Xt1 (350D) is very noisy over 400 ISO.

At that ISO noise, unless you are vastly underexposing, is no problem at all.

And if you are underexposing you can easily shoot at 1600 ISO or 3200 and still produce "noiseless" pics.

https://photography-on-the.net …php?p=8569131#p​ost8569131


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ebann
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Sep 08, 2009 06:10 |  #9

petersmart wrote in post #8603682 (external link)
I'm not sure why you say the Xt1 (350D) is very noisy over 400 ISO.

At that ISO noise, unless you are vastly underexposing, is no problem at all.

And if you are underexposing you can easily shoot at 1600 ISO or 3200 and still produce "noiseless" pics.

https://photography-on-the.net …php?p=8569131#p​ost8569131

I normally shoot ISO 800 without much noise detectable right off the camera... XTi is a great performer, much like the 30D. Since OP even suggested long exposures of a model?!? It is better to use strobes and increase shutter speed!


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alessandro2009
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Sep 08, 2009 09:21 |  #10

ChrisBreeden wrote in post #8603615 (external link)
... It's hard to get a model to stand completely 100% still for anything over 10 seconds.

What? :shock:
I speak about static subject for very long exposure.

Buy a 50 mm f/1.8, a flash (one or two), radio trigger, built a reflector (using simple aluminum paper), umbrella or better a softbox and you live happy.

Clearly better use f/2.8 (if you have space) or f/4 so you reduce the necessity of strong light.




  
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yogestee
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Sep 08, 2009 11:01 |  #11

ChrisBreeden wrote in post #8603362 (external link)
I have an Xti and am really ready for an upgrade. Since the Xti cannot go over 400 iso without exceedingly noisy results in low light situations I have to shoot at VERY long exposure. These is especially difficult with models. What I am wondering is how much of an upgrade is a 40d or 50d in situations like this. Do they perform noticably better at higher ISO's. Thanks for the help.

I don't understand this.. How about posting a few examples with EXIF intact..


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purelithium
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Sep 08, 2009 11:20 |  #12

Why are you using high ISO's for long exposures? You shouldn't need to, since it's a static subject. Just use ISO 100, and adjust as necessary. No need to push your sensor.


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gjl711
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Sep 08, 2009 11:29 |  #13

As already mentioned, a sample image would help greatly in understanding what you are trying to accomplish. Shooting at ISO400 for a ten second exposure sounds as if your shooting in pitch darkness or under starlight. In any case shooting in those conditions will always lead to noise and your probably better off using film. But again, before drawing a conclusion a sample with EXIF data would be very beneficial.


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merp
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Sep 08, 2009 11:30 |  #14
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These are all good advice/replies Mr.Breeden =)




  
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DC ­ Fan
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Sep 08, 2009 11:43 |  #15

ChrisBreeden wrote in post #8603362 (external link)
Since the Xti cannot go over 400 iso without exceedingly noisy results in low light situations...

Examples of an XTi at ISO over 400.

IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!
Byte size: ZERO | Content warning: NOT AN IMAGE


ISO 1600.


IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!
Byte size: ZERO | Content warning: NOT AN IMAGE


ISO 800.


IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!
Byte size: ZERO | Content warning: NOT AN IMAGE


ISO 1600.

So much depends on what you expect. If you look at every last pixel in a file, any image can seem bad if you look too closely. But if you're looking at a picture, viewing a complete composition, the XTi's high-ISO performance is pretty good.



  
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Xti to 50d? Need better performance in low light
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