Reality so Subtle 6×17 VS Zero612F VS Vermeer 6x17

[NedL]

Reality's camera has tow pins which can make horizons plan when on the top 1/3 or bottom 1/3 of the frame, but I wonder how the horizon line look like when placed on the meddle of the frame, since it doesn't have a pinhole on the centre/middle of the camera.

I keep 2 coffee can pinhole cameras in my car. One has a pinhole in the center, the other has a pinhole about 2/3 of the way up the side of the can. The off-center can can be used with "rise" or "fall" by simply turning the can over. I have been thinking about making a can with 3 or 4 pinholes, each covered with a tape shutter.

Personally, I enjoy using pinhole cameras that I have made myself.

 

[removedacct1]

Personally, I enjoy using pinhole cameras that I have made myself.

Hear hear!

 

[NedL]

Paul is right. In a curved-plane camera, if the camera is level the horizon wlll be straight. The effect of having the pinhole higher or lower ( "rise" or "fall" ) is to change the position of the horizon on the negative, including more sky or more foreground.

 

[marciofs]

Márcio,
Thats very true, but I don't mind the curved horizon effect in most cases - and in fact - I chose the Vermeer for its ability to render horizon lines as curves when I wanted to do that. If you aim the camera straight (not aimed up, not aimed down), then you will get no horizon bending effect

In instances like this, I rather like the curving horizon line:

I also like the bend horizon in this example.

But If I want straight horizon even aiming it up the horizon will still be curved right? (not as this much but still curved)

 

[NedL]

The horizon will be straight if the camera is level. Moving the pinhole up or down lets you "aim" up or down while keeping a straight horizon line.

 

[marciofs]

Paul is right. In a curved-plane camera, if the camera is level the horizon wlll be straight. The effect of having the pinhole higher or lower ( "rise" or "fall" ) is to change the position of the horizon on the negative, including more sky or more foreground.

Ok, I think I begin to understand now.

I thought the two pin holes was for straightening the horizont when the camera is tilted.

It means in Paul's example the camera is pointing up?

 

[NedL]

yes that's right. The horizon curves when the camera is tilted up or down.

 

[marciofs]

The horizon will be straight if the camera is level. Moving the pinhole up or down lets you "aim" up or down while keeping a straight horizon line.

Ok I got it now.


I am buing pinhole cameras because the ones I built I can't make stable when using tripod (cheap material). So instead of spend more money on materials to build better cameras I decide to buy ready made ones.

 

[NedL]

In this one, the horizon is almost straight. It seems to be looking up because the pinhole is above center.

Crane Creek par Ned, on ipernity

 

[NedL]

I'll be back in a minute. I want to take a picture of something that is very useful for putting all kinds of homemade cameras on a tripod ( it is not my idea... I learned it from Joe VanCleave. )

 

[marciofs]

Interisting. It is hard to me decide between Reality (2 pins) or Vermeer.

I am going to develop some negatives and I came back later on.

Edited: I forgot to buy distillated water.

 

[NedL]

This is a piece of scrap pine wood with a tripod socket and 4 cupholder hooks screwed in. The small bungee cords can be used to put almost any camera on this "platform". A small camera might only need 2 bungee cords to hold the camera in place, and my bigger cameras use 6 bungee cords end-to-end.

If the camera is big and light enough, wind is still a problem, but this works great and it is small and easy to carry.

Here it is being used with a flimsy mat board pinhole camera:

 

[marciofs]

This is a piece of scrap pine wood with a tripod socket and 4 cupholder hooks screwed in. The small bungee cords can be used to put almost any camera on this "platform". A small camera might only need 2 bungee cords to hold the camera in place, and my bigger cameras use 6 bungee cords end-to-end.

If the camera is big and light enough, wind is still a problem, but this works great and it is small and easy to carry.

Here it is being used with a flimsy mat board pinhole camera:

This is a very good idea.
Thank you for sharing it.
I don't don't know (and I don't plan to) if I will use the cameras I built anymore. I am 100% happy with Ilford Obscura I got. This and a panoramic camera for travelling I think I will be full equipped

 

[NedL]

Sounds good. You can use this simple idea if you ever decide you want to make more cameras! Who knows, maybe in a few years you will want to try making some bigger negatives in a big homemade camera.

Have fun!

 

[marciofs]

Sounds good. You can use this simple idea if you ever decide you want to make more cameras! Who knows, maybe in a few years you will want to try making some bigger negatives in a big homemade camera.

Have fun!

Probably I will. Thanks.

 

[Ezzie]

I have the Vermeer, and quite like it. Build is more than good, and nice enough. And the results are very good. You can specify other size pinholes if you prefer, the standard on the 6x17 is 0.300mm. Focal length is 90mm. Curved plane pinholes do not vignette as much as flat plane pinhole cameras, as the whole frame is equidistant to the pinhole.

An example:

Bath house #14 by Eirik0304, on Flickr

 

[europanorama]

The horizon will be straight if the camera is level. Moving the pinhole up or down lets you "aim" up or down while keeping a straight horizon line.

One can remove the bent perspectives by using altostorm photocorrector or in panorama-factory when stitching using equirectangular setting. working up to 160degr. roundshaped objects are not distorted anymore.