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Author Topic: Canon's new 800mm 5.6 lens  (Read 14344 times)
NikosR
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« on: October 17, 2007, 06:32:16 AM »
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Michael thinks that it will be humongous and require a sherpa to carry around but I suspect it won't be any heavier or really larger (maybe somewhat longer) than the 600 f4 lens. Any educated guesses?
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mahleu
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« Reply #1 on: October 17, 2007, 06:51:03 AM »
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I'm pretty sure it will be quite similar to the FD mount 800
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Gregory
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« Reply #2 on: October 17, 2007, 10:22:52 AM »
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I'm just an enthusiast but I suspect that it'd be the fabled 800 DO, lightish and beautiful.
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santa
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« Reply #3 on: October 17, 2007, 11:21:30 AM »
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It's an Alaskan Portrait Lens.
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Monito
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« Reply #4 on: October 17, 2007, 11:28:54 AM »
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It looks like it will be just about the same length and size as the 600 mm f/4.  The 800 mm is at the back (with the 6m minimum focusing distance), the 600 mm is second from the back, and the 200 mm f/2 is up front in this high resolution 5436 x 4080 picture:

Canon 2008 Super Tele Group
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MonitoPhoto (Landscape, Architecture, Portraits: Halifax, Nova Scotia)
Ray
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« Reply #5 on: October 18, 2007, 01:27:11 AM »
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Lenses are usually lighter if the maximum aperture is narrower, so one would expect the extra weight due to the longer focal length to be offset by a 1 stop slower lens, compared to the 600/4.

It's a pity the 40D does not have auto-focussing capability at f8. This 800mm lens plus 1.4x extender would give an effective reach in 35mm terms of 1800mm.
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juicy
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« Reply #6 on: October 18, 2007, 04:43:49 AM »
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Hi!

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It's a pity the 40D does not have auto-focussing capability at f8. This 800mm lens plus 1.4x extender would give an effective reach in 35mm terms of 1800mm.

Yes, that's a pity. Even more pity is that 1200mm f5.6 + 2x + 40D would give you 3840mm eqv but even less autofocus capability.  But I guess that with such magnification you might be able to focus manually. Probably the hardest part would be to figure out what to shoot with these combos...  

Cheers,
J
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BernardLanguillier
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« Reply #7 on: October 18, 2007, 04:54:51 AM »
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Not to mention the Nikkor 1200-1800 that is not an AF lens anyway.

cheers,
Bernard
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sojournerphoto
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« Reply #8 on: October 18, 2007, 04:58:34 AM »
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Lenses are usually lighter if the maximum aperture is narrower, so one would expect the extra weight due to the longer focal length to be offset by a 1 stop slower lens, compared to the 600/4.

It's a pity the 40D does not have auto-focussing capability at f8. This 800mm lens plus 1.4x extender would give an effective reach in 35mm terms of 1800mm.
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I've got an 1800mm telescope (f12 Maksutov). It fills the frame on my 5D with the moon very nicely:)

[a href=\"http://farm2.static.flickr.com/1014/1257210808_2964bfd463_o.jpg]http://farm2.static.flickr.com/1014/125721...964bfd463_o.jpg[/url]

Mike
« Last Edit: October 18, 2007, 05:00:55 AM by sojournerphoto » Logged
juicy
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« Reply #9 on: October 18, 2007, 05:49:48 AM »
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Don't know about the availability or price of the Nikkor 1200-1800mm but last time I saw the Canon 1200mm listed it would have bought 15 pieces of 1Ds2/3-bodies.  
 More seriously, the new 800mm might be better served when married with a better camera than 40D. With the new 1Ds3 you would get aprox similar resolution compared to the 40D if cropped but with much better viewfinder and AF.

Cheers,
J
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Ray
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« Reply #10 on: October 18, 2007, 06:24:29 AM »
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Don't know about the availability or price of the Nikkor 1200-1800mm but last time I saw the Canon 1200mm listed it would have bought 15 pieces of 1Ds2/3-bodies.  
 More seriously, the new 800mm might be better served when married with a better camera than 40D. With the new 1Ds3 you would get aprox similar resolution compared to the 40D if cropped but with much better viewfinder and AF.

Cheers,
J
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That's probably true. The 1Ds3 has the pixel density of a 20D and there's not much resolution difference between a 20D and the 40D; probably only noticeable on test charts.
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luong
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« Reply #11 on: October 19, 2007, 01:06:39 PM »
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Michael thinks that it will be humongous and require a sherpa to carry around but I suspect it won't be any heavier or really larger (maybe somewhat longer) than the 600 f4 lens. Any educated guesses?
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Think of it as a 600 f4 with a built-in TC 1.4x and it sounds quite reasonable.

What is a pity, though is that the pro Canon bodies seem to need f2.8 to use all their AF sensors.
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madmanchan
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« Reply #12 on: October 19, 2007, 02:59:31 PM »
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You must be referring to the cross-type behavior of some of the AF sensors.

All of the AF sensors of all 1-series bodies are horizontal-line sensitive at f/5.6, so AF can be used with the 800 f/5.6 for all sensors. However, only the central one will be vertical-line sensitive as well.
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seberri
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« Reply #13 on: October 21, 2007, 03:23:13 AM »
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Lenses are usually lighter if the maximum aperture is narrower, so one would expect the extra weight due to the longer focal length to be offset by a 1 stop slower lens, compared to the 600/4.

It's a pity the 40D does not have auto-focussing capability at f8. This 800mm lens plus 1.4x extender would give an effective reach in 35mm terms of 1800mm.
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normally if you can afford a 800mm, you have another body than the 40D
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John Sheehy
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« Reply #14 on: October 21, 2007, 06:40:10 PM »
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normally if you can afford a 800mm, you have another body than the 40D
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I know of at least one person using a $6k tele and a 40D.

The 40D resolves the center of the lens better than any Canon DSLR except the 400D.
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juicy
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« Reply #15 on: October 22, 2007, 01:01:52 PM »
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I know of at least one person using a $6k tele and a 40D.

The 40D resolves the center of the lens better than any Canon DSLR except the 400D.
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Hi!

Maybe 40D has better AF-performance than it's predecessors. 1-series bodies are light-years ahead of 10D and 20D when tracking moving subjects, flying birds for example.

Cheers,
J
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mahleu
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« Reply #16 on: October 22, 2007, 01:17:43 PM »
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normally if you can afford a 800mm, you have another body than the 40D
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You can't buy another stop of light. If I needed the range i'd put my long lens on a crop body.
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Tim Gray
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« Reply #17 on: October 22, 2007, 01:41:20 PM »
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You can't buy another stop of light. If I needed the range i'd put my long lens on a crop body.
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Depends on the "crop" factor and difference in resolution.  Eg: I could crop a 1ds3 down to the effective crop of my 1d3 at 1.3 and still have more resolution (if I recall crop on 22 mpx down to 1.3 is about 16 mpx, compared to the 10 for a 1d3.
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Lin Evans
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« Reply #18 on: November 15, 2007, 06:22:32 PM »
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Tim,

The 1DS3 is 21 megapixels - cropped to a true 1.3 that would give 14.7 mp. I think the 1d3 is actually a 1.27 crop (I'm not certain on this) and if so then cropping to that from the 1DS3 would give you about 15mp.

Lin

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Depends on the "crop" factor and difference in resolution.  Eg: I could crop a 1ds3 down to the effective crop of my 1d3 at 1.3 and still have more resolution (if I recall crop on 22 mpx down to 1.3 is about 16 mpx, compared to the 10 for a 1d3.
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Lin
macgyver
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« Reply #19 on: November 15, 2007, 07:57:42 PM »
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You can't buy another stop of light. If I needed the range i'd put my long lens on a crop body.
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Spoken like someone who knows what they are talking about.
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