October 21, 2014, 08:03:16 AM

Author Topic: Develop Announcement for an EF 800 f/5.6L IS II Coming This Fall? [CR1]  (Read 3772 times)

Sabaki

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Re: Develop Announcement for an EF 800 f/5.6L IS II Coming This Fall? [CR1]
« Reply #15 on: March 16, 2014, 02:59:09 AM »
Purely from a technology capability standpoint, I wonder if it's possible to get the same lens + 2X converter performance with an 800mm lens, that photographers are getting with the 300 f2.8 + 2X converter.

Yes, I do know the 1.4X converter delivers better results.
« Last Edit: March 16, 2014, 07:49:24 PM by Sabaki »
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Re: Develop Announcement for an EF 800 f/5.6L IS II Coming This Fall? [CR1]
« Reply #15 on: March 16, 2014, 02:59:09 AM »

rs

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Re: Develop Announcement for an EF 800 f/5.6L IS II Coming This Fall? [CR1]
« Reply #16 on: March 16, 2014, 03:37:34 AM »
Purely from a technology capability standpoint, I wonder if it's possible to get the same lens + 2X converter performance with an 800mm lens, than photographers are getting with the 300 f2.8 + 2X converter.

Yes, I do know the 1.4X converter delivers better results.
I'd have thought that in theory it would be. Having results which look great wide open with the 2x on a ~20MP body would indicate that the bare lens or even lens + 1.4x would look great wide open with a possible future high MP body.

Other than an indicator of the quality of the lens, I can't see much call for using an f5.6 lens with a 2x TC myself. The resulting f11 lens wouldn't AF on any body (excluding DPAF), and it doesn't leave you many options in terms of apertures for maximum detail due to diffraction.
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dolina

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Re: Develop Announcement for an EF 800 f/5.6L IS II Coming This Fall? [CR1]
« Reply #17 on: March 16, 2014, 04:20:51 AM »
2020 is getting closer every moment.  ;D
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garyknrd

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Re: Develop Announcement for an EF 800 f/5.6L IS II Coming This Fall? [CR1]
« Reply #18 on: March 16, 2014, 07:22:25 AM »
If under the 20K range I want one. I started saving 5 Yeats ago for this lens. I tried the 800L and did not like it. Nikon looks sweet also. Wait and see now.
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sanj

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Re: Develop Announcement for an EF 800 f/5.6L IS II Coming This Fall? [CR1]
« Reply #19 on: March 16, 2014, 08:38:39 AM »
2020 is getting closer every moment.  ;D

:)

Vern

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Re: Develop Announcement for an EF 800 f/5.6L IS II Coming This Fall? [CR1]
« Reply #20 on: March 16, 2014, 09:18:15 AM »
As a small bird enthusiast, the MFD will need to come down to compete w the 600II + 1.4X (4.5m). The current 800 MFD is 6m but prior super tele II's cut about 1m off MFD. So, if it has a built in 1.4X and an MFD of 5m plus lowered weight (4 kg) and a little better optics (better than 600II + 1.4X III, esp w the built-in 1.4X), I will buy one.
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Cali_PH

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Re: Develop Announcement for an EF 800 f/5.6L IS II Coming This Fall? [CR1]
« Reply #21 on: March 16, 2014, 11:06:08 AM »
2020 is getting closer every moment.  ;D

Oh, I thought this thread was about the EF 800, not the 7Dmk2... ;D

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Re: Develop Announcement for an EF 800 f/5.6L IS II Coming This Fall? [CR1]
« Reply #21 on: March 16, 2014, 11:06:08 AM »

9VIII

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Re: Develop Announcement for an EF 800 f/5.6L IS II Coming This Fall? [CR1]
« Reply #22 on: March 16, 2014, 11:45:15 AM »
they should make this lens with built in 1.4TC like the 200-400

I was going to say that it would add too much weight, but the 1.4xTC is only 8oz, and if the 800MkII follows the same weight pattern that the MkI did relative to the 500MkI, the 800MkII with TC would still come out lighter than the 600MkII.
And putting that extra weight on the back probably would make it more balanced.
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sanj

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Re: Develop Announcement for an EF 800 f/5.6L IS II Coming This Fall? [CR1]
« Reply #23 on: March 16, 2014, 01:49:35 PM »
2020 is getting closer every moment.  ;D

Oh, I thought this thread was about the EF 800, not the 7Dmk2... ;D

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9VIII

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Re: Develop Announcement for an EF 800 f/5.6L IS II Coming This Fall? [CR1]
« Reply #24 on: March 16, 2014, 03:57:22 PM »
Other than an indicator of the quality of the lens, I can't see much call for using an f5.6 lens with a 2x TC myself. The resulting f11 lens wouldn't AF on any body (excluding DPAF), and it doesn't leave you many options in terms of apertures for maximum detail due to diffraction.

On that subject, the other day I was wondering if they couldn't incorporate Contrast Detect AF at the same time as using Phase Detect AF in an SLR design? All they would have to do is lay a few stripes of pixels somewhere in either the optical path of the AF sensor or even the viewfinder, and everything would function normally except with the added Contrast Detect AF.
Alternatively they could just put single pixel wide slots in the AF mirror (or both, a few microscopic lines in the viewfinder wouldn't kill its functionality) so that some light that would have gone to the AF sensor just hits the main sensor instead, and they could put colourless microlenses in just those spots to improve light gathering. The only downside to using pixels on the imaging sensor itself is I have noticed more sensor noise when using live view. If a sensor has the capability to activate and read only select lines of pixels (or individual pixels) I guess that would be fine.

If you put hybrid AF in an SLR then a person could seamlessly continue to use AF at any aperture they want (in the case of flipping a TC on during use), it would potentially improve AF accuracy overall, and could even auto correct AF calibration.
« Last Edit: March 16, 2014, 04:00:24 PM by 9VIII »
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Steve

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Re: Develop Announcement for an EF 800 f/5.6L IS II Coming This Fall? [CR1]
« Reply #25 on: March 16, 2014, 04:02:50 PM »
perhaps the new lens will have a built-in 1.4

This should be mandatory design for all new superteles industry wide.  There's really no reason not to at this point. 

Bob Howland

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Re: Develop Announcement for an EF 800 f/5.6L IS II Coming This Fall? [CR1]
« Reply #26 on: March 16, 2014, 05:36:34 PM »
perhaps the new lens will have a built-in 1.4

This should be mandatory design for all new superteles industry wide.  There's really no reason not to at this point.

Mandatory?!?!

9VIII

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Re: Develop Announcement for an EF 800 f/5.6L IS II Coming This Fall? [CR1]
« Reply #27 on: March 16, 2014, 08:57:20 PM »
perhaps the new lens will have a built-in 1.4

This should be mandatory design for all new superteles industry wide.  There's really no reason not to at this point.

Mandatory?!?!

On pain of death.
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Re: Develop Announcement for an EF 800 f/5.6L IS II Coming This Fall? [CR1]
« Reply #27 on: March 16, 2014, 08:57:20 PM »

jrista

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Re: Develop Announcement for an EF 800 f/5.6L IS II Coming This Fall? [CR1]
« Reply #28 on: March 16, 2014, 09:03:13 PM »
The 300-600 MkII supertele lenses were something like 18 months from development announcement to launch.  Hopefully Canon can do better...

Canon did have earthquakes, tsunamis and melting nuclear power plants to contend with during the creation of the Mark II series as well. Gotta take that into account. ;)

sanj

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Re: Develop Announcement for an EF 800 f/5.6L IS II Coming This Fall? [CR1]
« Reply #29 on: March 17, 2014, 07:44:12 AM »
The 300-600 MkII supertele lenses were something like 18 months from development announcement to launch.  Hopefully Canon can do better...

Canon did have earthquakes, tsunamis and melting nuclear power plants to contend with during the creation of the Mark II series as well. Gotta take that into account. ;)

True.

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Re: Develop Announcement for an EF 800 f/5.6L IS II Coming This Fall? [CR1]
« Reply #29 on: March 17, 2014, 07:44:12 AM »