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Topics - Ayelike

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Lenses / Canon 2x Extender III AF Performance
« on: August 04, 2012, 07:12:05 AM »
Hello,

I took my new 5D3 out for a field test at a motor sport event and was very impressed with the subject tracking capabilities. I was using my 70-200mm and the AF Servo maintained focus from the cars coming into view all the way to flying past me. Perfect.

After just going full-frame I'm thinking about getting a little more reach and am thinking about the 2x extender. I'm happy to take the hit on aperture and IQ (extender III with 70-200 IS II seem to work pretty well together) but my question is about the drop in AF speed.

I read somewhere that AF speed is reduced by 75% but what does that mean in the real world? The lens I want to use it on focuses pretty quickly so is quarter of the speed still ok or an age?

Also, once focus is acquired, will the 5D3 still be able to track the subject or will it drop out due to the AF slower speed?

I'd love to hear from anybody that has this combo and has used it for motor sports. Is the extender mainly for static subjects or those moving across the way - rather than subjects whizzing towards you with speed.

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Lenses / 70-200mm f2.8 to 70-200mm f2.8 IS II worth it?
« on: June 26, 2012, 03:21:38 PM »
I'm just looking at the lenses I own and wondering if upgrading my 70-200mm f2.8 to the IS II version would be worth it. Now I've upgraded to the 5D3 I'm doing more low light work and I'm thinking the IS will be a bonus.

The test shots make the IS II look a little sharper and also it seems to work better with extenders. I just wondered if anybody on here had used both and what their thoughts were.

I think by the time I've sold my old one and bought a new one it'll cost me about £1,000. For that money I could extend my reach and options by getting a 7D or put the money towards a 300mm or 400mm.

Thoughts please?

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Lenses / Going full frame and needing more reach. Suggestions please?
« on: June 01, 2012, 12:17:54 PM »
I'm moving from a crop sensor to a full-frame and I'm getting worried that my 70-200 f/2.8 isn't going to get me close enough to the action anymore. I do a lot of motor sport photography so have been enjoying a fast lens with 320mm equivalent reach.

The 400mm f/5.6 has caught my eye as an affordable option. I'm getting the Canon 5D3 so I'm thinking I just ramp up the ISO to maintain the shutter speeds I usually use. I've managed to live ok without IS as my subjects are moving faster than I shake the camera anyway.

Everybody seems to end up suggesting the 100-400mm IS but I won't be using that 100-200mm end, not sure about how much IS I'll end up using, and it's not as sharp as the prime.

I guess I want to know, does anyone use the 400mm prime for this type of thing or is it really designed for sitting on a tripod looking at birds?

Also, extenders... are these as foggy as some of the examples photos make them look or are they ok? Fast auto-focus is pretty important in this environment too so I don't want to compromise on that too much. Is there much difference between using an extender and just cropping a shot?

Thanks for any comments you can give.

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EOS Bodies - For Stills / Quick Tests for Canon 5D MKIII
« on: May 31, 2012, 06:42:57 PM »
So after a year plus of waiting, I'm finally getting my hands on a 5D3 in two weeks time. I'm from the UK but to save some cash I'm picking it up when I have a trip over to Germany to see a friend - customs are fine with the import as it's purchased within the EU for personal use so no issues there.

My question for you guys is, I've basically got one day with the camera in Germany before I head back to the UK so I want to make sure I've got a good copy while I'm over there. I don't know if I've spent too long in this forum to get a bit paranoid about bad copies but what kind of tests can I do to make sure I've not got any of the issues people have been sending dud copies back for? High ISO shots to check noise levels? Long exposures of light and dark scenes to check for dead/hot pixels etc? Is there a way of mapping out hot pixels?

I'm guessing my copy is a post-light-leak model as it has only come into stock this week but I'll check for the xxxxx1xxxxxx or xxxxx2xxxxxx serial numbers.

Any tips would be gratefully received!

Oh and if it helps, although I'm getting body only, I'll be taking my Canon 24-70mm f2.8 L for the tests.

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