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11-10-2014, 09:28 AM   #1
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The Tele-wide viewfinder

I see a lot of people here have put this thing on their pentax q's.

But, I'm a bit unsure how exactly it works. I'm a bit new to these types of cameras. Isn't the focal length on the viewfinder fixed? If so, is it useful at all? Is it only useful with the q01 lens?

Could someone be so nice as to explain this noobie how it works?

11-10-2014, 01:12 PM   #2
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Hello,

With mirrorless cameras, it's important to remember that many of them have no VF's at all and the few that do (there are exceptions) use an EVF (Electronic Image). The issue; is many shooters are not accustomed to working off the LCD and for those coming from traditional SLR's or rangefinders (like myself); we are used to viewing our FOV in real time. An electronic image has already been captured by the camera’s sensor and fed to the EVF so if you try and photograph what you see; your image will be off by a fraction of a second. Optical viewfinders have come back to fill this need, namely photographers using mirrorless cameras but wanting a real time or optical viewing image.

For the most part, the field of view just like a rangefinder is fixed and a frame line is added to show the approximate coverage of a particular focal length. An advantage when using a longer focal length than the OVF’s field of view is you can see what is happening around your subject. If viewing a scene through a 90mm lens on an SLR, you would only be aware of what was in the view of the lens. When using a 90 on an M6 rangefinder (for example) your view is that of a 28mm with a 90 frame line. You can watch what is happening around your subject and frame and trigger your shutter as needed.

Some viewfinders can be suitable for multiple focal lengths. Some like the Tele-Wide Finder I found on line have frame lines for 35&90mm focal lengths. Others are adjustable showing a visual reference from 28mm’s to 135mm’s. I have even found some that take interchangeable front elements (wide & Tele).

The O-VF1 47mm Viewfinder from Pentax has an angle of view (49.5) and is compatible with the 8.5mm (similar to 47mm in the 35mm format) standard prime lens for the Q camera.

I hope this helps.

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11-10-2014, 01:39 PM   #3
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It answered most of my questions actually, thank you!

I'm a bit curious though, where did you find viewfinders with adjustable lines?
11-10-2014, 01:52 PM   #4
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Hello,

The lines do not move, a mask does. I have one like this:

Chuck

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