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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 20 Jan 2011 (Thursday) 20:25
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Website for showing FL difference?

 
huntersdad
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Jan 20, 2011 20:25 |  #1

Anyone know of a website that you can plug in distance from subject, crop factor, FL and TC factor and see the differences? For example, if I wanted to look at one picture and see it as a 1.6 sensor with a 400 vs a 1.3 sensor with a 400 and 1.4 TC would see it.

Anyone know of something like that?


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steve ­ o ­ 77
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Jan 20, 2011 20:30 |  #2

Never heard of one.

well you could pretty easily do it in photoshop or any other photo editing software. You would just have to do a bit of math first to find how much to crop.


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folville
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Jan 20, 2011 21:20 |  #3

This would be very helpful. I work with a lot of young photographers, and having this kind of tool would make my life a lot easier (as I recall, there's a third-party manufacturer with this info on its website, but I can't remember which one).


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DreDaze
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Jan 20, 2011 21:23 |  #4

sort of:
http://lens-reviews.com …w-visualisation-tool.html (external link)

also this one...but it doesn't have 1.3X...just 1.6(digital) i think, and FF
http://www.tamron-usa.com …cal-length-comparison.php (external link)


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folville
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Jan 20, 2011 21:28 |  #5

Thanks, it's the Tamron one I was thinking of. These are very useful.


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OneyedJack
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Jan 20, 2011 21:38 |  #6

DOF masters might be of some help.

http://www.dofmaster.c​om/dofjs.html (external link)


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juanpafer
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Jan 20, 2011 21:46 |  #7

Not exactly what you are looking for but this might help:
Juzaphoto (external link)


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huntersdad
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Jan 21, 2011 07:21 |  #8

juanpafer wrote in post #11682636 (external link)
Not exactly what you are looking for but this might help:
Juzaphoto (external link)

That is getting very close. I'll have try it with a picture this weekend. I think that might show me what I want to see.

Quick question though, Juan: If I am using a 1.4x TC on a lens, should I go ahead and put the apparent FL (i.e., 400 * 1.4 = 560 FL)?


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juanpafer
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Jan 21, 2011 10:23 |  #9

huntersdad wrote in post #11684539 (external link)
That is getting very close. I'll have try it with a picture this weekend. I think that might show me what I want to see.

Quick question though, Juan: If I am using a 1.4x TC on a lens, should I go ahead and put the apparent FL (i.e., 400 * 1.4 = 560 FL)?

Correct.


Juan

  
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Website for showing FL difference?
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