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Thread started 29 Jun 2006 (Thursday) 10:49
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Canon EF 50mm f/1.8 II - Nifty Fifty

 
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Salman1
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Jan 19, 2008 18:26 as a reply to  @ post 4736321 |  #1831

The photo's look great. I guess I'm more concerned because the 50mm is more like a 75mm-80mm isn't it as far as a digital lens is concerned?




  
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mellowd
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Jan 19, 2008 18:28 |  #1832

Salman1 wrote in post #4738402 (external link)
The photo's look great. I guess I'm more concerned because the 50mm is more like a 75mm-80mm isn't it as far as a digital lens is concerned?

On a crop body, yes. Your FOV would not match a 50mm on FF


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Salman1
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Jan 19, 2008 19:19 as a reply to  @ mellowd's post |  #1833

Okay, now I'm confused. On a crop body, which I thought the 40D was, 50mm is not really 50mm, but on a FF it is right?




  
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S-S
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Jan 19, 2008 19:23 |  #1834

Salman1 wrote in post #4738704 (external link)
Okay, now I'm confused. On a crop body, which I thought the 40D was, 50mm is not really 50mm, but on a FF it is right?

thats right, on a 1.6 crop it is really 80mm




  
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Salman1
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Jan 19, 2008 21:49 as a reply to  @ S-S's post |  #1835

I guess for the price its and awesome deal but maybe a 21 or 24mm would be better but that could be expensive unless there is one out there in the similar price range but not the price of an IS or L lens.




  
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tonylong
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Jan 19, 2008 22:03 |  #1836

Salman1 wrote in post #4738704 (external link)
Okay, now I'm confused. On a crop body, which I thought the 40D was, 50mm is not really 50mm, but on a FF it is right?

You don't need to worry about it unless you're coming from shooting film and have worked with lenses and famiaiarized yourself in dealing with specific focal lengths, or have a full-frame digital body and want to match the field of view between the two cameras and your lenses.

On a crop body 50mm is really 50mm physically (the lens still has a 50mm focal length), but the smaller sesnor physically pics up the center portion of the image, hence the term crop. So, the field of view captured by the crop sensor is like the field of view you would get using a longer lens on a 35mm film or full frame sensor.

If you're trying to match focal length equivalence between a film or full frame camera and a 40D "crop" camera, you can just figure that to get an equivalent field of view of, say a 50mm lens on the FF you multiply the 50x1.6 and reach for a lens that is in that range.

In normal use, I think it's easier if I just get to know my lenses and what I want to shoot with a given camera, knowing that wide is wider on full frame, long is longer on crop, but it's the field of view that changes, not the physical focal length: 50mm is really still 50mm, but visually gives the field of view of something closer to 85mm.


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S-S
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Jan 19, 2008 22:25 |  #1837

tonylong wrote in post #4739647 (external link)
You don't need to worry about it unless you're coming from shooting film and have worked with lenses and famiaiarized yourself in dealing with specific focal lengths, or have a full-frame digital body and want to match the field of view between the two cameras and your lenses.

On a crop body 50mm is really 50mm physically (the lens still has a 50mm focal length), but the smaller sesnor physically pics up the center portion of the image, hence the term crop. So, the field of view captured by the crop sensor is like the field of view you would get using a longer lens on a 35mm film or full frame sensor.

If you're trying to match focal length equivalence between a film or full frame camera and a 40D "crop" camera, you can just figure that to get an equivalent field of view of, say a 50mm lens on the FF you multiply the 50x1.6 and reach for a lens that is in that range.

In normal use, I think it's easier if I just get to know my lenses and what I want to shoot with a given camera, knowing that wide is wider on full frame, long is longer on crop, but it's the field of view that changes, not the physical focal length: 50mm is really still 50mm, but visually gives the field of view of something closer to 85mm.

yes - but if your crop sensor is 10pmx (for example) and u compare it to a ff sensor of the same size, the digital zoom effect will apply




  
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tonylong
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Jan 19, 2008 22:32 |  #1838

somethingsimple wrote in post #4739799 (external link)
yes - but if your crop sensor is 10pmx (for example) and u compare it to a ff sensor of the same size, the digital zoom effect will apply

True (more pixels in the 10mp crop sensor than in the equivalent portion of a 5D 12mp sensor even). This is a valid reason to choose whether to shoot a given scene with a crop or a full frame.

But just so there is not confusion, a 50mm lens is still really a 50mm lens on both cameras.


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el ­ aye
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Jan 20, 2008 01:25 as a reply to  @ tonylong's post |  #1839

One of my first shots with this lens.


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Salman1
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Jan 20, 2008 09:42 as a reply to  @ tonylong's post |  #1840

Well, there is a significant learning curve hear because I AM coming from shooting 35mm film for many years. Amateur photographer for most things and more experience shooting fire scenes for quite a long time.




  
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flipstyle72
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Jan 20, 2008 12:45 |  #1841
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el aye wrote in post #4740564 (external link)
One of my first shots with this lens.

ha, i love it.




  
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willy ­ b
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Jan 20, 2008 17:18 |  #1842

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prime
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Jan 20, 2008 20:51 as a reply to  @ willy b's post |  #1843

IMAGE: http://farm2.static.flickr.com/1132/757850640_43bbeee167_o.jpg
1/320 sec, f/2.8, ISO 100.

IMAGE: http://farm1.static.flickr.com/160/436651082_fcb36b8b79_o.jpg
1/250 sec, f/2.8, ISO 400. Garfield Conservatory.

IMAGE: http://farm1.static.flickr.com/172/439323736_73b09d1435_o.jpg
1/100 sec, f/1.8, ISO 1600. If you've been to the shedd aquarium you know how dark it is around the tanks on the first floor.

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gixxer
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Jan 21, 2008 08:45 |  #1844

f/2.0 iso100 1/3200sec

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Salman1
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Jan 21, 2008 09:12 as a reply to  @ gixxer's post |  #1845

Nice photos. I often read on these boards about how certain lenses etc. aren't accepted/revered etc. because of the AF. It is amazing to see how many people don't choose to use manual focus. I guess its just a technology thing...




  
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