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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 22 Jun 2012 (Friday) 17:05
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Lens with best magnification at 3-4 feet

 
kawi_200
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Jun 23, 2012 02:44 |  #16

^ Only missing the fact that you don't want to be 18" away from a rattle snake :) But, yes 180mm from 3-4ft away would be pretty good.

noisejammer: To find MM of a lens do you take the MFD in inches and divide by the mm? Your example is 4ft @ 200mm, so 36"/200mm??? Or should you convert the 36" to metric also, to keep the unit of measurement the same?


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Canon ­ Bob
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Jun 23, 2012 02:59 |  #17

kawi_200 wrote in post #14619719 (external link)
noisejammer: To find MM of a lens do you take the MFD in inches and divide by the mm? Your example is 4ft @ 200mm, so 36"/200mm??? Or should you convert the 36" to metric also, to keep the unit of measurement the same?

I was going to run your post through a translation program but there wasn't an option to convert "gibberish" to English" ;)

Bob


1Dx2 (2), 5DSR, 1Ds3, 1D4, 5D2(590nm), 5D2(720nm) EF600 EF400 EF300-II EF300 EF200 EF200-II EF180L EF135L EF100 EF85-II EF50L TS-E17/4 TS-E24L-II TS-E45 TS-E90 MP-E65 EF70-200-II EF24-70/2.8-II EF16-35/4 EF8-15/4 EF11-24/4 Zeiss 15/2.8 21/2.8 25/2 28/2 35/1.4 35/2 50/2 85/1.4 100/2 135/2 T/C's L-SC & a WIFE!

  
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arentol
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Jun 23, 2012 03:37 |  #18

This seems like the perfect option....

http://www.bhphotovide​o.com/c/product/539396​- (external link)
REG/Tamron_AF001C_700_​70_200mm_f_2_8_Di_LD.h​tml

70-200 f/2.8 MFD is 3.12' for 1:3.1 magnification. Add a 1.4TC and you should be in really good shape.


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kawi_200
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Jun 23, 2012 04:31 |  #19

Canon Bob wrote in post #14619741 (external link)
I was going to run your post through a translation program but there wasn't an option to convert "gibberish" to English" ;)

Bob

How would you phrase the question "To find maximum magnification of a lens?" Canon Bob? Because if you keep the unit of measurement the same (metric) then you'd end up with 1219.2mm (4ft) at 200mm. 200/1219.2 equals roughly 0.164, so which is the correct formula? Inches divided by millimeters, or millimeters divided by millimeters? You don't calculate MPG by taking how many kilometers you drive and dividing by how many gallons you used..... dick


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Canon ­ Bob
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Jun 23, 2012 06:13 as a reply to  @ kawi_200's post |  #20

Kawi, you lost me in your first post with ....."Your example is 4ft @ 200mm, so 36"/200"

I can only assume you have smaller feet than me?

I think it's safe to work on the publicised figures which give a maximum magnification of 0.21x (ie, 1/5 life size appx) at MFD

Bob


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swldstn
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Jun 23, 2012 06:18 |  #21

I now it's all ready been suggested but I also think the 180mm macro would work here.


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jimewall
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Jun 23, 2012 07:00 as a reply to  @ post 14619344 |  #22

I believe any of the following would work mor3 than satisfactory - a good 1.4X, a 25mm extension tube, any 180 macro, or the 300mm f/4.0L IS.


Thanks for Reading & Good Luck - Jim
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pwm2
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Jun 23, 2012 07:09 |  #23

kawi_200 wrote in post #14619719 (external link)
^ Only missing the fact that you don't want to be 18" away from a rattle snake :) But, yes 180mm from 3-4ft away would be pretty good.

noisejammer: To find MM of a lens do you take the MFD in inches and divide by the mm? Your example is 4ft @ 200mm, so 36"/200mm??? Or should you convert the 36" to metric also, to keep the unit of measurement the same?

Note that a 200mm lens need not be 200mm for the full distance range. It can be a lot less than 200mm at minimum focus distance.


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chrismarriott66
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Jun 23, 2012 09:21 |  #24

Having just re-read the original post, the OP doesn't want to get closer than 3-4 feet, and the mfd of the 70-200 f4 non-IS is pretty much 4ft...

Therefore, the only option really is to use a TC or buy a larger focal length (> 200) lens. As people have suggested, a longer lens will give a larger mfd, but you could add an extension tube to get back to around 4ft.

Do you have a budget in mind OP?


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artyH
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Jun 23, 2012 09:31 |  #25

Sigma
Sigma 70-300mm f/4-5.6 APO DG Macro Tele Zoom Lens for Canon EOS Cameras - USA Warranty
This one goes to 1/2 life size and is $200 or so. I have the cheaper one. Quality doesn't compare to the Canon 70-200F4L, but the 2 cheap Sigma lenses does give you 1/2 life size and works pretty well close up. The price is about that of a good set of extension tubes, and might be worth trying.
Mine sits in a closet, but you can try out the APO version, as it is reported to be better than the less expensive model ($160).
The new models with OS don't give this same magnification, so don't bother with them.




  
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Canon ­ Bob
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Jun 23, 2012 09:38 |  #26

chrismarriott66 wrote in post #14620429 (external link)
Therefore, the only option really is to use a TC or buy a larger focal length (> 200) lens.

I still think the Life-Size-Converter would be perfect for this scenario. I've just tried it on my 70-200/2.8 (probably a close match for the f/4 in temrs of MFD and magnification).
At 200mm indicated, the focus range is from 1m to 4m (3'-16') approx and an equivalent FL of about 300mm.

Bob


1Dx2 (2), 5DSR, 1Ds3, 1D4, 5D2(590nm), 5D2(720nm) EF600 EF400 EF300-II EF300 EF200 EF200-II EF180L EF135L EF100 EF85-II EF50L TS-E17/4 TS-E24L-II TS-E45 TS-E90 MP-E65 EF70-200-II EF24-70/2.8-II EF16-35/4 EF8-15/4 EF11-24/4 Zeiss 15/2.8 21/2.8 25/2 28/2 35/1.4 35/2 50/2 85/1.4 100/2 135/2 T/C's L-SC & a WIFE!

  
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chrismarriott66
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Jun 23, 2012 09:47 |  #27

Canon Bob wrote in post #14620482 (external link)
I still think the Life-Size-Converter would be perfect for this scenario. I've just tried it on my 70-200/2.8 (probably a close match for the f/4 in temrs of MFD and magnification).
At 200mm indicated, the focus range is from 1m to 4m (3'-16') approx and an equivalent FL of about 300mm.

Bob

Good point... I had forgotten you mentioned that.

What I essentially meant was that the current lens configuration is about as close as he's willing to get, so whilst the suggestion of macro lenses would be cool and give some awesome results, Mr Snake might not get so happy about it :p


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jimewall
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Jun 23, 2012 09:53 as a reply to  @ chrismarriott66's post |  #28

Canon-Bob & OP. The Life Size Converter is just a combination teleconverter with extension. Its use on the 50CM turned it into a 70ish or 90ish (somewhere in that range) with a loss of infinity focus 1 to 1 macro - at a very expensive price. Just as good (beter?) results would result from the use of just a good 1.4X teleconverter or 25mm worth of extension.


Thanks for Reading & Good Luck - Jim
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Canon ­ Bob
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Jun 23, 2012 10:16 |  #29

jimewall wrote in post #14620532 (external link)
....Just as good (beter?) results would result from the use of just a good 1.4X teleconverter or 25mm worth of extension.

If that's your experience Jim then it's worthy option. Personally, I find the LSC better than a TC when working near MFD.

Bob


1Dx2 (2), 5DSR, 1Ds3, 1D4, 5D2(590nm), 5D2(720nm) EF600 EF400 EF300-II EF300 EF200 EF200-II EF180L EF135L EF100 EF85-II EF50L TS-E17/4 TS-E24L-II TS-E45 TS-E90 MP-E65 EF70-200-II EF24-70/2.8-II EF16-35/4 EF8-15/4 EF11-24/4 Zeiss 15/2.8 21/2.8 25/2 28/2 35/1.4 35/2 50/2 85/1.4 100/2 135/2 T/C's L-SC & a WIFE!

  
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FEChariot
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Jun 23, 2012 10:18 |  #30

studlymonkey wrote in post #14619177 (external link)
This is what I am getting from my 70-200 f4 non is

Im really pleased with the results, but on smaller snakes, I can't get as close as I want

Looking at this shot, I would think you may want a stabilized option to allow you to stop the lens down more and get more of the snake in focus while still handholding it. That is unless you are crazy enough to take the time to set up a tripod next to a rattler.

What kind of budget do you have for this?


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Lens with best magnification at 3-4 feet
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