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Archive 2008 · Canon EOS 50D Master thread

tanglefoot47
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p.43 #1 · Canon EOS 50D Master thread

I did run down to the beach low light bumped the ISo to 2000 using my 100-400 to get 1/320. Looks OK but little more noise than I was hoping for. Tomorrow I am hoping for some sun breaks to at least see what it will do with lower ISO

Oct 06, 2008 at 11:39 PM

Dan Martin
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p.43 #2 · Canon EOS 50D Master thread

I did some more testing of the 50D and 30D tonight, this time was with the cameras teathered to my laptop.

I ran through the whole ISO range, shooting RAW, SRAW1, and SRAW2 at each setting. I hate doing these tests, because they're rather tedious and it's nearly impossible to keep all the variables in check. Anyhow, I gave it a try and the results were interesting, although far from conclusive.

In an attempt to level the playing field, I ran both the 50D files and the 30D files through the DNG converter with ACR 4.6 beta, then compared them in Lightroom 2.0. This time the results were not quite as good as what I saw with the DPP conversions I tried earlier. At native resolutions, the noise performance was nearly identical between both cameras at all comparable ISOs. Depending on what scaling method I used, I could get about a 1-stop improvement in noise when reducing the 50D image to 30D dimensions.

At the end of the day, I'm not sure if I'm testing the RAW converter or comparing cameras here. The 50D files out of DPP have less noise and more detail, even when the noise slider is turned down to 1 (out of 20). When using the same DNG converter for the 30D files and 50D files, the per-pixel noise is nearly identical.

Tomorrow I will print a few test strips from both cameras. I'm expecting that when printing to the same fixed size, the 50D prints will appear less noisy due to the relatively smaller pixels. If the final output is better, I don't care about what the pixels look like...

Oct 06, 2008 at 11:45 PM

Ron Hole
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p.43 #3 · Canon EOS 50D Master thread

My 50 *should* arrive Thursday, about 3 hours before I am going to use it to shoot night football under poor lights. I am hoping to be able to shoot at 3200 but may have to bump to 6400 in some areas of the field.

Is there a consensus as to what camera settings relating to high ISO and noise reduction I should be using? Noise reduction on or off? The other one that is new to me, "ALO" I think it was called. Anything else to be aware of?

I typically process RAW files in DPP and then use Neat Image to clean up if need be.

Sorry I don't have time to figure this out before I hit the field so I thought I would draw on the forums experience.

thanks
Ron

Oct 07, 2008 at 12:31 AM

Geert Koning
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p.43 #4 · Canon EOS 50D Master thread

Diary started at Digital Outback Photo:

http://www.outbackphoto.com/CONTENT_2007_01/section_gear_cameras/20081006_Canon_50D/index.html

Oct 07, 2008 at 12:32 AM

SeanKP
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p.43 #5 · Canon EOS 50D Master thread

Jim Victory wrote:
I notice the AF to lock focus quicker than the 40D and comparable to the MKIII. A 100-400 that is somewhat sluggish on the 40D, compared to the MKIII, responds as though it is on a 1 series. This is focus acquisition not AI Servo performance I'm talking about. The focus also appears to be accurate even without MA. I will test AI Servo tomorrow to see if it performs any better than the 40D. I don't expect it to compare to the 1 series though.

Thanks for your comments Jim. Very informative. I'm particularly interested to hear how you have found the AI Servo performance.

Cheers.

Sean

Oct 07, 2008 at 04:32 AM

michael49
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p.43 #6 · Canon EOS 50D Master thread

Dan Martin wrote:
...Tomorrow I will print a few test strips from both cameras. I'm expecting that when printing to the same fixed size, the 50D prints will appear less noisy due to the relatively smaller pixels. If the final output is better, I don't care about what the pixels look like...

That's what its all about; let us know how they turn out.

Oct 07, 2008 at 11:22 AM

clintsmith
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p.43 #7 · Canon EOS 50D Master thread

We got our 50Ds on Friday October 3rd from our local shop. I purchased these for my students to use in my photography class.

From my unscientific test, unless it is a f/2.8 lens or a f/4 L series you dont get anywhere near the 6.3 FPS. Fortunately I have mainly 2.8 glass, but when I tried to use the new 18-200 or the 28-135 kit lenses that my students will use we do not get the performance. Bright ambient light or not.

This is what it says about lenses and AF in the manual on page 89.
"In the AI Servo Mode, the continunous shooting speed may become slightly slower depending on the subject and the lens used." I have found this to be true in AI Focus also.

Looks like I will continue to purchase the Tamron Di series for my students, because that is the only cheap glass that seems to work well with this body.

I really hope Canon addresses this with a firmware fix!

Oct 07, 2008 at 03:39 PM

Daan B
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p.43 #8 · Canon EOS 50D Master thread

clintsmith wrote:
From my unscientific test, unless it is a f/2.8 lens or a f/4 L series you dont get anywhere near the 6.3 FPS. Fortunately I have mainly 2.8 glass, but when I tried to use the new 18-200 or the 28-135 kit lenses that my students will use we do not get the performance. Bright ambient light or not.

This is what it says about lenses and AF in the manual on page 89.
"In the AI Servo Mode, the continunous shooting speed may become slightly slower depending on the subject and the lens used." I have found this to be true...Show more →

How is it possible that the lens used has an affect on the FPS

Oct 07, 2008 at 03:47 PM

Gary Petersen
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p.43 #9 · Canon EOS 50D Master thread

How is it possible that the lens used has an affect on the FPS

The lens aperture opens then stops down for each shot in the series. It will slow down the fps even with an "L" series if stopped down a lot.

Oct 07, 2008 at 04:05 PM

Hey.Underpants
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p.43 #10 · Canon EOS 50D Master thread

Gary Petersen wrote:
Not to mention the slower lenses cripple the af.

The lens aperture opens then stops down for each shot in the series. It will slow down the fps even with an "L" series if stopped down a lot.

Oct 07, 2008 at 04:28 PM

EB-1
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p.43 #11 · Canon EOS 50D Master thread

Usually maximum shutter speeds are at two stops down or wider. That is nothing new, as anyone with a 1vHS can attest.

EBH

Oct 07, 2008 at 07:54 PM

skibum5
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p.43 #12 · Canon EOS 50D Master thread

Daan B wrote:
How is it possible that the lens used has an affect on the FPS

some have slower motors and just don't keep up well.

put a tamron 28-75 f/2.8 on a 40D and try AI servo and you get like 2-3fps!

even a 70-200 f/2.8 canon lens if you move it around wildly under tricky conditions it'll occasionally stutter down the fps a bit too.

most lenses allow it to maintain fps pretty well unde rnormal conditions, but some are definitely worse. I think it has all to do with AF and how much light sensor gets or how fast the lens can respond.

Oct 07, 2008 at 11:19 PM

EB-1
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p.43 #13 · Canon EOS 50D Master thread

The effect of aperture on FPS occurs even with AF off.
AF tracking is a separate issue.

EBH

Oct 07, 2008 at 11:23 PM

Arawak420
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p.43 #14 · Canon EOS 50D Master thread

were are the 12800 iso images? turn the NR on as well... prolly not going to upgrade as my 40 broe down twice before the warranty ended..... got it back hte 2nd time just in time to shoot a 800+ picture wedding. she worked well as she is suppose to for that kind of money..

Oct 08, 2008 at 02:12 AM

EB-1
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p.43 #15 · Canon EOS 50D Master thread

High ISO is not so great in the darker, smooth areas. I like ISO 100 and 200 best. ISO 3200 is the highest true sensitivity.

EBH

Oct 08, 2008 at 06:17 AM

Daan B
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p.43 #16 · Canon EOS 50D Master thread

I don't know if it has been posted already, but here is another review with some interesting remarks about noise performance and RAW conversion by DPP and ACR 4.6 (IMHO of course):

http://www.techradar.com/products/cameras-and-camcorders/cameras/digital-slrs/canon-eos-50d-458349/review

Oct 08, 2008 at 03:07 PM

Imagemaster
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p.43 #17 · Canon EOS 50D Master thread

And some interesting comments from Les:

The pictures that I posted were all converted using the ACR beta that has preliminary support for the 50D. Out of curiosity, I took the original RAW files and tried converting them using DPP. Comparing the ACR versions with the DPP versions at 100%, the amount of noise in the DPP versions was somewhat lower than it was in the ACR versions. It was close enough, though, that at anything less than 100%, I wouldn't notice the difference. I thought about posting the DPP versions here, but, because they were relatively relatively close, it didn't seem to be worth the...Show more →

Oct 08, 2008 at 06:13 PM

tonyhart
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p.43 #18 · Canon EOS 50D Master thread

So I got my 50D in the post the other day and used it in anger for the first time yesterday while shooting a uni rugby match. It now complements a 20D in the bag and here are some initial impressions based on one shoot:

The 50D seemed to offer me a much higher percentage of keeper shots with far fewer errant OOF frames while tracking in AI servo. In one particular sequence, I had a center running straight at me on his way to the tryline as I was stood behind it. Shooting at high speed continuous I found the camera noticeably faster through the frames than the 20D while using a 135mm f2L. Add to this that each frame was crisp and sharp, something that I've found less achievable on the 20D and this immediately seemed like a big improvement.

To give you some idea of how I had the camera setup, I was shooting at F3.2 ISO 100 with AI servo on the centre spot. I have the CF4 Shutter button/AF-On button set to (2) Metering Start/Meter+AF Start and had the AE Lock and AF-ON button switched. Therefore, back button focusing, exposure on the shutter release.

This works great for me, but there is one downside to the setup which makes me like the 20D configuration more. The 20D doesn't have an AF-ON button, so you can use the AE lock button as a focus button without having to set it to switch with another button. This is better for two reasons:

- Firstly, on the 50D, if you don't switch the AF-ON with the AE Lock then when you go to use the grip, there is no focus button. The WiFi grip apparently includes an AF-ON button, but this is not the ideal tool for me.

- The second issue raises its ugly head while reviewing photos on the rather lovely screen. The AF-ON / AE Lock switch CF switches ALL functions of these buttons, not just the ones related to focusing. So, when viewing a photo, you zoom in to check sharpness and with the AF point selector button, which in this mode doubles as a zoom in. Then you want to zoom out so you press it's neighbour to the left, which is the AE lock button and has a zoom out icon beneath it. But of course, as you've switched it's functionality with it's neighbour one further to the left this just takes you back to a 'ready to shoot' state.

It's seriously annoying. There's no way to have the AF on a back button and the grip at the same time without messing up the intuitiveness of the zoom-in/zoom-out controls. I'd like to see a fix for this in a firmware update. It might seem like a small thing, but it's software that's letting the camera down here.

The camera did wig out on my halfway through the first half giving me a 'Busy' message whenever I tried to take a shot. It was as if it was clearing the frame buffer, but it wasn't as the red light wasn't on and I hadn't shot a picture for some minutes. It took a removal of the batteries for about 10seconds to resolve the problem. It should be noted that I am shooting with a BG-E2N grip, though whether this had anything to do with it remains to be seen.

The one other observation I have is that using LR2.1 and ACR4.6 the sRAW files I shot (due to limited card space) seem slightly richer in the blues and purples on import than suits my eye. This is probably just how LR is dealing with the initial render and can probably be easily corrected, but it was an observation rather than a criticism. Picture styles are new to me, and I had the camera set to 'standard' the whole time, but I assume these only apply if shooting in JPEG anyways.

Anyone, those are the thoughts so far, if you have any questions let us have them and I'll do my best to answer.

Oct 09, 2008 at 05:35 AM

Ron Hole
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p.43 #19 · Canon EOS 50D Master thread

tonyhart wrote:
- The second issue raises its ugly head while reviewing photos on the rather lovely screen. The AF-ON / AE Lock switch CF switches ALL functions of these buttons, not just the ones related to focusing. So, when viewing a photo, you zoom in to check sharpness and with the AF point selector button, which in this mode doubles as a zoom in. Then you want to zoom out so you press it's neighbour to the left, which is the AE lock button and has a zoom out icon beneath it. But of course, as you've switched it's functionality with...Show more →

It took me about 5 mins to get used to using the AF-ON button to zoom out. Time to buck up for the new grip if you want it in vertical as well.

Ron

Oct 09, 2008 at 01:15 PM

nctemper
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p.43 #20 · Canon EOS 50D Master thread

I have firmware version 1.0.1 and others have a later version 1.0.2 already

Link: http://www.diwa-labs.com/wip4/detail.epl?id=274386

Oct 09, 2008 at 02:07 PM

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