Next Lens for 50D

[MrT]

Daniel thank you for your reply, sorry for getting back to you so much later. Since then I have been taking more indoor photos and want to ask your opinion on a different approach then my first questions.


I have read some other responses on lens versus bodies and iso and aperture and how each one effects the end results. I need some more help with understanding what are the best choices for my needs.


Would I achieve better results with my current 70-200 4L and a new 5DII for basketball/track and portraits or my current 50D and a new 70-2002.8L? I keep reading that the 50D is not the best at higher iso like 1,600 compared to the 5DII. And without using a flash it seems like I have needed to up the iso to at least 1,600 to get a decent sutter speed. So now I am wondering if it wouldn't be better to go with a new body for iso performance rather then 2.8 aperature lenses for right now. Another factor is shutter speed, is the 5DII fast enough for basketball and track pictures?


I would still want to purchase some additional leness as I see my needs develop with a full frame perspective.

[Daniel Browning]

Would I achieve better results with my current 70-200 4L and a new 5DII for basketball/track and portraits or my current 50D and a new 70-2002.8L?

In low light, if you can fill the frame with the 5D2+f/4, it will blow the 50D+f/2.8 out of the water in terms of noise, contrast, and overall image quality. No contest. But filling the frame with the 5D2 can be hard when you shoot sports, because the 50D at 125mm has an angle of view equivalent to 5D2+200mm.


One option is to use a 1.4X TC on the 5D2 when you shoot sports, and take it off for portraits. 1.4X TC combined with the higher total megapixels on the 5D2 should result in the exact same amount of "reach". You will have to underexpose even *further* (f/2.8 -> f/5.6), but it wont be enough to offset the read noise advantage of the 5D2, IMHO. (The distortion and chromatic aberration added by the TC can be corrected in post production if you have the right software.)


If you crop instead of TC, then global contrast will go down to the same level as the 50D, and pixel resolution will be lower. But it still has an advantage in low light: very low read noise at ISO 1600. Even when cropped to the same angle of view as the 50D, the 5D2 still has lower read noise. But then it will have lower resolution: just 8 MP vs 15 MP on the 50D.


But there are other important issues to consider. The 50D has a much newer and more advanced autofocus system, as well as a much higher frame rate. Furthermore, the f/2.8 lens will activate the f/2.8 center AF sensor, which is 6 times more accurate than the f/5.6 sensors.


Plus the 50D is cheaper. So when the 60D comes out in little while, you can take the $1500 you saved by not buying the 5D2 and spend it on the 60D.


It's a tough choice.

[jusap]

For the 17-55 vs 24-70, it's a wide vs tele. but for your needs, shooting indoor games, i'd go for the 24-70 on your 50D. It gives you the extra reach that you need to take shots.





regarding the 70-200 f4 + 5DMKII vs 70-200 f2.8 + 50D... Umm... I'm not really sure. I'm gunning for full frame bodies and lenses but it will lessen the reach of your 200s compared to having a crop body. but as Daniel suggests, you can get a TC for that but I would pair it with the 70-200 2.8 rather than the f4.