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Archive 2013 · X20 VF - Why the prisms?
  
 
Yakim Peled
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p.1 #1 · p.1 #1 · X20 VF - Why the prisms?


If you look here, you'll see that the VF has 2 prisms. For an camera with RF design, this seems to me as an unnecessary complication. Why not make it a straight line? As I'm sure the bean counters went over it, I'm sure there's a sound technological reason behind it. I just wonder what it is.

TIA.

Happy shooting,
Yakim.



Jan 10, 2013 at 06:49 AM
Makten
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p.1 #2 · p.1 #2 · X20 VF - Why the prisms?


Yakim Peled wrote:
If you look here, you'll see that the VF has 2 prisms. For an camera with RF design, this seems to me as an unnecessary complication. Why not make it a straight line? As I'm sure the bean counters went over it, I'm sure there's a sound technological reason behind it. I just wonder what it is.


It's not a rangefinder, and the prisms allows a longer path between the lens elements even with a narrow body. The same principle is used in many older binoculars:

http://upload.wikimedia.org/wikipedia/commons/f/f8/Binocularp.svg



Jan 10, 2013 at 11:05 AM
Yakim Peled
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p.1 #3 · p.1 #3 · X20 VF - Why the prisms?


But what is the benefit of this longer path?

Happy shooting,
Yakim.



Jan 10, 2013 at 12:35 PM
lou f
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p.1 #4 · p.1 #4 · X20 VF - Why the prisms?


pretty sure you need the lenght the get the magnification.


Jan 10, 2013 at 12:40 PM
Mescalamba
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p.1 #5 · p.1 #5 · X20 VF - Why the prisms?


I dont get why it doesnt have EVF..


Jan 10, 2013 at 07:27 PM
lou f
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p.1 #6 · p.1 #6 · X20 VF - Why the prisms?


$$$


Jan 10, 2013 at 10:01 PM
 

Search in Used Dept. 



Mescalamba
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p.1 #7 · p.1 #7 · X20 VF - Why the prisms?


Yea cause now its cheap.


Jan 10, 2013 at 11:16 PM
praktinafan
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p.1 #8 · p.1 #8 · X20 VF - Why the prisms?


Optical viewfinder has no pixel smearing, instant picture refresh, 100% refresh rate. EVF does not.

I think that one of the reasons to use two prisms in the picture path is the electronic layer, another is the zoom mechanism.



Apr 04, 2013 at 12:51 PM
Yakim Peled
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p.1 #9 · p.1 #9 · X20 VF - Why the prisms?


I think I'm going to get it as I can't find any serious falt in it. Anyone wants a 7D?

Happy shooting,
Yakim.



Apr 04, 2013 at 12:59 PM
praktinafan
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p.1 #10 · p.1 #10 · X20 VF - Why the prisms?


Do you know that flickr! group?
http://www.flickr.com/groups/fujifilmx20/

Interesting thread:
http://www.flickr.com/groups/fujifilmx20/discuss/72157633088454135/



Apr 04, 2013 at 01:31 PM
Yakim Peled
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p.1 #11 · p.1 #11 · X20 VF - Why the prisms?


No I didn't. 10X.

Happy shooting,
Yakim.



Apr 05, 2013 at 08:29 AM





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