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ZEISS DTI thermal imaging cameras. For more discoveries at night, and during the day.

Which one - Canon Prime 400mm F5.6 or canon 100 - 400 IS L (1 Viewer)

You wont regret getting the 400, I got this shot of a song thrush on my first day out with the lens. Its been cropped, resized and compressed but it still shows how incredibly fast the autofocus can lock onto moving targets.
 

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Wow, if I get shots as good as that, Kevin, I'll be very happy indeed.

Just a comment how far you can push the 400 mm f 5.6 and still get reasonable shots - the photograph of a Pine Martin below was taken on an old 350D body and the 400 lens, it was taken in the very dark Bielowieza Forest, it was late evening and raining. As a consequence light was awful - I had to hike it up to ISO 1600 (which is not perfect on that body) and even then could only use 1/60th second speed. The animal was in the canopy above my head and the shot was handheld, pointing directly upwards. Considering all, I would say I am happy with this picture.

Picture two, of the shrike, was in much better light this weekend, but from my slowly moving car.
 

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Those pics are certainly a lot better than those I can get with my Sigma 170-500mm (which I use on a Nikon D80 - both of which I'll be selling to fund the purchase of a Canon 40D to go with my 20D once I get my new lens).

I'm getting a little twitchy in case the 400mm f/5.6 suddenly stop being made or sell out before I can get one! ;) :-O
My bank loan should go in over the weekend so I am going to order one in the next couple of days. B :)
 
Those pics are certainly a lot better than those I can get with my Sigma 170-500mm (which I use on a Nikon D80 - both of which I'll be selling to fund the purchase of a Canon 40D to go with my 20D once I get my new lens).

I'm getting a little twitchy in case the 400mm f/5.6 suddenly stop being made or sell out before I can get one! ;) :-O
My bank loan should go in over the weekend so I am going to order one in the next couple of days. B :)

Check with Ian Kerr, I got mine from him this week best price UK I think.
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Jos ,

when shooting outside in low light you often get a blue cast with slow shutter speeds. I lifted your image (hope you don't mind) went to levels and clicked on blue scale on RGB and slid the left-hand slider to the right to get 34, mid tone 0.78 and right hand 255. I imagine many who use the canon 100-400 (I know yours on this occasion was the prime) may get this a lot and have not figured it out and blame the lens. Others may have be able to improve it further. Unfortunately I don't have all the bells and whistles...but I'm cool about that.:t:
 

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Jos, nice pics ,...when you say 'my slowly moving car'...were you driving it?:smoke:

Guilty, I frequently do this. I have found that stopping often causes the bird to fly, but slowly cruising past, it just sits there ...so steer with your knee, hold the lens in position in advance and click click click as you pass. Technique not recommended on the M25. etc ;)

Below picture done the same way.
 

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You wont regret getting the 400, I got this shot of a song thrush on my first day out with the lens. Its been cropped, resized and compressed but it still shows how incredibly fast the autofocus can lock onto moving targets.

Image attached snapped today with the slow Canon 100-400 zoom not much crop. I admit the settings were wrong for the shot since I was prepared for a different shot:-C. I've done peregrines for the last three years and the lens does the job;)...peregrines are pretty fast!:t: as is the focus on my zoom :king:which others would have you believe works with a hand winding mechanism:'D:'D:'D
 

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My own newly-ordered 400/5.6 has arrived and is sitting at home, waiting for my return. At some point, I'll do an A/B with the 100-400 and the 300/4 + TC. Long term, I think the 300/4L IS will be going on sale soon after.

Vandit.
 
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