August 20, 2014, 10:58:43 PM

Author Topic: Development Announcement of a New 800mm f/5.6L IS II [CR1]  (Read 2566 times)

jrista

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Re: Development Announcement of a New 800mm f/5.6L IS II [CR1]
« Reply #30 on: Today at 01:45:04 PM »
For me, the maximum focal length that still allows autofocus is important.
I have the 600 II with a 5D3 so can use autofocus at 1200mm at f/8 with a 2x extender. The 800mm f/5.6 can only autofocus with the 1.4 extender (1120 mm at f/8). All things considered, I like the flexibility offered by the 600 f/4 versus the 800 f/5.6.

Same here, I like being able to use 1200mm f/8 when I need to, and for a lot of the birds I shoot, it's necessary.

However, I do suspect that the 800/5.6 + 1.4x will produce better IQ than the 600/4 + 2x...and for some people, having that extra bit of IQ is everything. I know of some bird photographers who refuse to use teleconverters, ever, period, because they don't like how it affects their sharpness.
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Re: Development Announcement of a New 800mm f/5.6L IS II [CR1]
« Reply #30 on: Today at 01:45:04 PM »

FEBS

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Re: Development Announcement of a New 800mm f/5.6L IS II [CR1]
« Reply #31 on: Today at 02:13:47 PM »
Hi raptor3x, jrista and macguyver thanks a lot for your detailed explanations of IS and tripod. Learned again from CR.
Camera: 1Dx, 5D3, 7D, 300D  | Prime:14 2.8Lii, 24 1.4Lii, 50 1.4, 85 1.2Lii, 100 2.8Lmacro, 300 2.8Lii | Zoom: 16-35 4.0L, 24-105 4.0L, 70-200 2.8Lii, 200-400 1.4x L | TS-E 24 3.5Lii | Other: 1.4xIII, 2.0xIII, Yongnuo, CamRanger

mackguyver

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Re: Development Announcement of a New 800mm f/5.6L IS II [CR1]
« Reply #32 on: Today at 02:39:32 PM »
For me, the maximum focal length that still allows autofocus is important.
I have the 600 II with a 5D3 so can use autofocus at 1200mm at f/8 with a 2x extender. The 800mm f/5.6 can only autofocus with the 1.4 extender (1120 mm at f/8). All things considered, I like the flexibility offered by the 600 f/4 versus the 800 f/5.6.
Same here, I like being able to use 1200mm f/8 when I need to, and for a lot of the birds I shoot, it's necessary.
I didn't find 1600mm at f/11 to be too great with the 800mm, but I didn't have my loaner long enough to really play with it.  Also, with the 7D, the 2560mm effective focal length made finding your subject in the VF just about in impossible, and even with IS, manual focusing was a guess.

Also, when you get into these extremes, you need to be shooting in cold, clean alpine air, or humidity and other environmental conditions will wreck your image.
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jrista

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Re: Development Announcement of a New 800mm f/5.6L IS II [CR1]
« Reply #33 on: Today at 04:35:22 PM »
Also, when you get into these extremes, you need to be shooting in cold, clean alpine air, or humidity and other environmental conditions will wreck your image.

Depends on what your shooting. I have no need to shoot wildlife at 1200mm, 600mm is actually more than plenty. Sometimes deer and the like get so close out of curiosity that I can't even get a shot.

With waders and other larger, shy birds, that might be a problem. Depends on whether where you live is humid or not. I live in Colorado. We've had some hot years, but most of the time it's not blistering (80 degrees or cooler) and it's pretty dry up here in general. The only time I've had problems with water vapor being a problem was when the temperature was near or over 100 degrees...then it's a problem even at 600mm.

The real benefit of 1200mm comes into play when your photographing small birds. With just the 600mm, even at a relatively close distance, with a full frame, they are quite small. Moving to 1200mm with passerines isn't because they are far away...it's just to increase their size relative to the frame, but your still relatively close. More than close enough that water vapor in the air isn't going to be a problem between lens and subject (it might wreck your background boke...but that's a whole different deal.)
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mackguyver

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Re: Development Announcement of a New 800mm f/5.6L IS II [CR1]
« Reply #34 on: Today at 04:46:09 PM »
Also, when you get into these extremes, you need to be shooting in cold, clean alpine air, or humidity and other environmental conditions will wreck your image.

Depends on what your shooting. I have no need to shoot wildlife at 1200mm, 600mm is actually more than plenty. Sometimes deer and the like get so close out of curiosity that I can't even get a shot.

With waders and other larger, shy birds, that might be a problem. Depends on whether where you live is humid or not. I live in Colorado. We've had some hot years, but most of the time it's not blistering (80 degrees or cooler) and it's pretty dry up here in general. The only time I've had problems with water vapor being a problem was when the temperature was near or over 100 degrees...then it's a problem even at 600mm.

The real benefit of 1200mm comes into play when your photographing small birds. With just the 600mm, even at a relatively close distance, with a full frame, they are quite small. Moving to 1200mm with passerines isn't because they are far away...it's just to increase their size relative to the frame, but your still relatively close. More than close enough that water vapor in the air isn't going to be a problem between lens and subject (it might wreck your background boke...but that's a whole different deal.)
Agreed, and that must be nice to have few issues with humidity. I lived in CO for a while and certainly miss a lot or things about it.  Here in Florida, the humidity is highest during the best light, and is usually over 80%, so shots beyond 50 feet or so start getting soft.  With birds, it seems like you need every millimeter you can get and I'm sure 1200mm helps a lot for the little birds in particular.  I didn't feel like 800mm was enough for a lot of birds.  Sometimes, you need millimeters to shoot from further away (gators for me, grizzlies for you), though, and that's when air quality, temperature (shimmer), and humidity become a real pain.
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scyrene

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Re: Development Announcement of a New 800mm f/5.6L IS II [CR1]
« Reply #35 on: Today at 05:45:04 PM »
The real benefit of 1200mm comes into play when your photographing small birds. With just the 600mm, even at a relatively close distance, with a full frame, they are quite small. Moving to 1200mm with passerines isn't because they are far away...it's just to increase their size relative to the frame, but your still relatively close. More than close enough that water vapor in the air isn't going to be a problem between lens and subject (it might wreck your background boke...but that's a whole different deal.)

Absolutely. As I've said, I use 1000mm as my normal birding focal length now, and it's often not quite enough. Passerines are tiny and skittish, and getting them with good feather detail requires a long focal length coupled with a fairly close distance - I suppose under 50 metres. I've included some shots I took this year at 1000mm - all will be cropped. Any extra focal length is welcome! See my Flickr for better/more details.
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Former lenses include: 70-200L f/4 non-IS, 200L 2.8, 400L 5.6

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Re: Development Announcement of a New 800mm f/5.6L IS II [CR1]
« Reply #35 on: Today at 05:45:04 PM »