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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 28 Nov 2009 (Saturday) 19:20
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50mm f/1.8 for ASP-C sensor

 
SkipD
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Nov 30, 2009 10:36 |  #16

Baselerd wrote in post #9107479 (external link)
Thanks for the input. So can anyone recommend some decent fast 50mm equivalent lenses,...

What, exactly, do you mean by "50mm equivalent lenses"? I suspect strongly that there will be many folks misunderstanding this.


Skip Douglas
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Lowner
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Nov 30, 2009 11:00 |  #17

I've always thought that 50mm was too short on a 35mm camera, never did understand why it was considered the "normal" focal length. Putting it on a crop frame digital brings it alive.


Richard

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gkarris
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Nov 30, 2009 11:11 |  #18

SkipD wrote in post #9107709 (external link)
What, exactly, do you mean by "50mm equivalent lenses"? I suspect strongly that there will be many folks misunderstanding this.

Around 50mm after his camera's crop factor...

Lowner wrote in post #9107847 (external link)
I've always thought that 50mm was too short on a 35mm camera, never did understand why it was considered the "normal" focal length. Putting it on a crop frame digital brings it alive.

50mm is closest to what your eye sees...




  
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akdmx
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Nov 30, 2009 11:47 |  #19

I have one, and it's a little long for me too, but for the price it's definitely worth having




  
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DC ­ Fan
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Nov 30, 2009 11:50 |  #20

Baselerd wrote in post #9098423 (external link)
However, I have a 1.6 crop factor sensor, giving an effective field of view equivalent to an 80mm on a FF camera. Is this too long for general purpose photography?

Images from a 50mm f/1.8 II and a XTi with the "1.6x" factor, run through Noiseware:

IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!
Byte size: ZERO | Content warning: NOT AN IMAGE


IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!
Byte size: ZERO | Content warning: NOT AN IMAGE


IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!
Byte size: ZERO | Content warning: NOT AN IMAGE


No problems with lens, focal length or sensor size.



  
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gkarris
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Nov 30, 2009 11:50 |  #21

gkarris wrote in post #9107526 (external link)
28 x 1.6 = 44.8mm
35 x 1.6 = 56mm

So either the above... 28mm or 35mm depending on if you want slightly wide or slight zoom from 50mm.

I just realized that Sigma makes a 30/1.4 - fast and 30x1.6=48mm - pretty close and fast.

Here's the link to someone who just sold one here, though you can purchase anywhere:

https://photography-on-the.net/forum/showthre​ad.php?t=782778




  
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Baselerd
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Nov 30, 2009 12:08 |  #22

Thanks for the advice. I suppose I will walk around with my 18-55mm IS set to 50mm and see if that suits me, if it does I will probably get the 50mm f/1.8


Rebel XSi (450D) | 18-55mm IS Canon| 60mm USM EF-S macro | 55-250 IS Canon | Canon Speedlite 420EX | ProOptics Extension Tubes | Opteka Fisheye | Lumiquest Softbox

  
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Cyrix_2k
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Nov 30, 2009 13:01 |  #23

Personally, I find 50mm too long on a crop for a walk around. It's much more comfortable lens on a FF, but I also learned with a 50mm f/1.8 & 35mm film so that's my comfort zone.


Olympus OM-10 35mm SLR | Canon EOS 5D | Canon EOS 5D Mk III

Sigma 24-60mm f/2.8 EX | Sigma 50mm f/1.4 EX | Sigma 70-200mm f/2.8 EX

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eelnoraa
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Nov 30, 2009 13:09 |  #24

JeffreyG wrote in post #9098559 (external link)
The 50/1.8 makes for a nice cheap portrait lens for 1.6X shooters on a budget. I'd not call it a general purpose lens because it is a short telephoto. Also the AF system on this lens can be a little innaccurate.

I totally agree. It is a nice lens for the money, but the inconsistant AF makes this lens less desireable. It is definitely a portrait type of lens on crop body. If you think your 60f/2.8 isn't fast enough, then 50f/1.8 will help quite a bit (if it isn't too dark to AF), but if you want to improve low light ability of your 18-55IS, then you should look for something else.


5Di, 5Diii, 28, 50, 85, 16-35II, 24-105, 70-200F2.8 IS

  
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Lowner
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Nov 30, 2009 13:36 |  #25

"50mm is closest to what your eye sees..."

Yes, thats the quote that is always supposed to justify its use, but I still think something around 75 - 80mm would make a better "normal" lens on FF.


Richard

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gkarris
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Nov 30, 2009 13:39 |  #26

Lowner wrote in post #9108781 (external link)
"50mm is closest to what your eye sees..."

Yes, thats the quote that is always supposed to justify its use, but I still think something around 75 - 80mm would make a better "normal" lens on FF.

Not justifying its use, just answering the question. Everyone has their own preference as far as shooting pics.




  
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DaveSt
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Nov 30, 2009 14:42 |  #27

Lowner wrote in post #9108781 (external link)
"50mm is closest to what your eye sees..."

Yes, thats the quote that is always supposed to justify its use, but I still think something around 75 - 80mm would make a better "normal" lens on FF.

That's because you are using your definition for the word "normal" and not the definition used in the industry. A normal lens refers to a lens that produces images that look natural, or most closely represent what the human eye sees. In the 35mm format that happens to be somewhere around 50mm which is why people refer to 50mm lenses as "normal" lenses. It has nothing to do with convenience. A 80mm lens on FF does not look the same as what my eye sees, but a 50mm is pretty close.


Dave

[30D] [Sigma 30 f/1.4] [50 f/1.8] [EF-S 60] [EF-S 15-85IS] [EF-S 55-250IS] [Sigma EF-500 DG Super]

  
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SkipD
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Nov 30, 2009 14:43 |  #28

gkarris wrote in post #9107910 (external link)
50mm is closest to what your eye sees...

NOT.

50mm is the accepted "normal" focal length for the 35mm film format (such as that used by the so-called "full-frame" DSLRs), but it is NOT a "normal" focal length for an APS-C format camera.


Skip Douglas
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SkipD
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Nov 30, 2009 14:46 |  #29

SkipD wrote in post #9107709 (external link)
What, exactly, do you mean by "50mm equivalent lenses"? I suspect strongly that there will be many folks misunderstanding this.

gkarris wrote in post #9107910 (external link)
Around 50mm after his camera's crop factor....

That may be your impression, but I still want to know what was meant by that as posted by the person who posted it - baselerd.


Skip Douglas
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..... but still learning all the time.

  
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gkarris
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Nov 30, 2009 15:22 |  #30

SkipD wrote in post #9109242 (external link)
NOT.

50mm is the accepted "normal" focal length for the 35mm film format (such as that used by the so-called "full-frame" DSLRs), but it is NOT a "normal" focal length for an APS-C format camera.

umm, duh....




  
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50mm f/1.8 for ASP-C sensor
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