Archive 2013 · X20 VF - Why the prisms?

Yakim Peled
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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 01:49 AM

Makten
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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 06:05 AM

Yakim Peled
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p.1 #3 · X20 VF - Why the prisms?

But what is the benefit of this longer path?

Happy shooting,
Yakim.

Jan 10, 2013 at 07:35 AM

lou f
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p.1 #4 · X20 VF - Why the prisms?

pretty sure you need the lenght the get the magnification.

Jan 10, 2013 at 07:40 AM

Mescalamba
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p.1 #5 · X20 VF - Why the prisms?

I dont get why it doesnt have EVF..

Jan 10, 2013 at 02:27 PM

lou f
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p.1 #6 · X20 VF - Why the prisms?

$$$

Jan 10, 2013 at 05:01 PM

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

Yea cause now its cheap.

Jan 10, 2013 at 06:16 PM

praktinafan
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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 07:51 AM

Yakim Peled
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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 07:59 AM

praktinafan
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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 08:31 AM

Yakim Peled
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p.1 #11 · X20 VF - Why the prisms?

No I didn't. 10X.

Happy shooting,
Yakim.

Apr 05, 2013 at 03:29 AM


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