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Canon 200 f/2 vignetting?
#1
Hi all,

 

Does anyone have information on the vignetting of the Canon 200 f/2 lens?

I am looking for something similar to that provided for the Nikon 200 f/2:

http://www.opticallimits.com/nikon_ff/49...ff?start=1

to compare the two.

 

Regards,

Sapkas

#2
The Canon vignets more gradually (less noticable because of the more gradual character). In the extreme corners the vignetting is about the same.

http://www.the-digital-picture.com/Revie...nsComp=751

Whether that is a good thing for your application, no idea.

Since you use such a large sensor, maybe you should look for a medium format lens?
#3
Quote:The Canon vignets more gradually (less noticable because of the more gradual character). In the extreme corners the vignetting is about the same
Quote:http://www.the-digital-picture.com/Revie...nsComp=751
 

Great link! Thanks, Brightcolours.

 

One thing is unclear from the figures: what is the size of the entire box, and what is the size of the light gray rectangle inside?

Axis labels, tickmarks, explanation are missing, plus the "?" link at  the top of the page is broken.

 

 

Quote:Whether that is a good thing for your application, no idea.

Since you use such a large sensor, maybe you should look for a medium format lens?
 

There isn't any medium format lens I know of (in production) at the f/2 or faster range and ~200mm focal length.
#4
Since speed seems to be important for your application: are you aware that the current Canon 200/2 IS replaced an even faster lens, the EF 200/1.8 L USM?

 

-- Markus

Editor
opticallimits.com

#5
Since the f/1.8 is discontinued, I'm not sure how easy it would be to source.

These guys seemed to like it though, on an approx. 27.6mm square sensor.
http://en.wikipedia.org/wiki/SuperWASP

I'd love one to try something similar but it is a bit beyond my budget.
<a class="bbc_url" href="http://snowporing.deviantart.com/">dA</a> Canon 7D2, 7D, 5D2, 600D, 450D, 300D IR modified, 1D, EF-S 10-18, 15-85, EF 35/2, 85/1.8, 135/2, 70-300L, 100-400L, MP-E65, Zeiss 2/50, Sigma 150 macro, 120-300/2.8, Samyang 8mm fisheye, Olympus E-P1, Panasonic 20/1.7, Sony HX9V, Fuji X100.
#6
Quote:Great link! Thanks, Brightcolours.
 
One thing is unclear from the figures: what is the size of the entire box, and what is the size of the light gray rectangle inside?
Axis labels, tickmarks, explanation are missing, plus the "?" link at  the top of the page is broken.
The size of the entire displayed area should be a nominal 36mm x 24mm which is the sensor size used in the test cameras. I presume the inner box shows the nominal area of an APS-C sized sensor, but this will vary slightly between models and I don't know what value they may have used. It is in the range of 1.5x to 1.6x smaller on each axis than the overall area.


Also, I had one more thought. Again I don't know what the original application is, but would a hyperstar arrangement be any use?
https://starizona.com/acb/hyperstar/specs.aspx
In short, you need to buy a compatible telescope and the matching hyperstar module. This can give you insane focal ratios at longer focal lengths. Want 675mm f/1.9? You can, if you can handle a physical aperture of 14" with a wallet to match! Smaller sizes are available too. However in terms of light gathering ability and overall contrast, there will be some reduction as the sensor needs to be placed in front of the optics. A DSLR would be at best inappropriate if it would even work at all in this scenario. To properly make use of this you would be looking at astronomical or industrial imaging cameras.
<a class="bbc_url" href="http://snowporing.deviantart.com/">dA</a> Canon 7D2, 7D, 5D2, 600D, 450D, 300D IR modified, 1D, EF-S 10-18, 15-85, EF 35/2, 85/1.8, 135/2, 70-300L, 100-400L, MP-E65, Zeiss 2/50, Sigma 150 macro, 120-300/2.8, Samyang 8mm fisheye, Olympus E-P1, Panasonic 20/1.7, Sony HX9V, Fuji X100.
#7
Hi folks,

 

RE:

Quote:Since speed seems to be important for your application: are you aware that the current Canon 200/2 IS replaced an even faster lens, the EF 200/1.8 L USM?

 

-- Markus
 

Yes, I know that there was this 200/1.8 lens. In fact, I have some of those, but they are getting impossible to

buy, and the used ones (by now, i.e. 2013) are often in mediocre condition.

 

 

Quote:The size of the entire displayed area should be a nominal 36mm x 24mm which is the sensor size used in the test cameras. I presume the inner box shows the nominal area of an APS-C sized sensor, but this will vary slightly between models and I don't know what value they may have used. It is in the range of 1.5x to 1.6x smaller on each axis than the overall area.



Also, I had one more thought. Again I don't know what the original application is, but would a hyperstar arrangement be any use?
https://starizona.com/acb/hyperstar/specs.aspx
 

Yep, know of it, and using this for a 40cm f/2 arrangement, but that is a whole different story.

Here I need roughly 200mm focal length, f/2 or better, compact design, and no central obstruction.

 

 

Quote:In short, you need to buy a compatible telescope and the matching hyperstar module. This can give you insane focal ratios at longer focal lengths. Want 675mm f/1.9? You can, if you can handle a physical aperture of 14" with a wallet to match! Smaller sizes are available too. However in terms of light gathering ability and overall contrast, there will be some reduction as the sensor needs to be placed in front of the optics. A DSLR would be at best inappropriate if it would even work at all in this scenario. To properly make use of this you would be looking at astronomical or industrial imaging cameras.
 

Thanks for the very creative ideas!

I will keep bombarding the list with lens-related questions, probably by opening a new thread for each topic.
#8
Now I'm really curious what you're using all this kit for, but I guess you can't or don't want to say...

There's only one other option I can think of, although it probably wont offer much over a native 200mm f/2 other than possible lower cost. Pick up a 300mm f/2.8 class lens of your choice, and run it though one of these: http://www.metabones.com/sony/ef-e-speed-booster giving 213mm f/2.

Now there will be drawbacks here. The image will only cover APS-C sensor size, and I don't think it will improve vignetting over the native lens. Also the distance remaining between mount and sensor wont be much...
<a class="bbc_url" href="http://snowporing.deviantart.com/">dA</a> Canon 7D2, 7D, 5D2, 600D, 450D, 300D IR modified, 1D, EF-S 10-18, 15-85, EF 35/2, 85/1.8, 135/2, 70-300L, 100-400L, MP-E65, Zeiss 2/50, Sigma 150 macro, 120-300/2.8, Samyang 8mm fisheye, Olympus E-P1, Panasonic 20/1.7, Sony HX9V, Fuji X100.
  


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