Yoshizen's Blog

Pinhole Photos on Alpha 7R

As I promised I made a pinhole to my friend’s  A7 camera.

Alpha 7(1)-001

8mm hole was made on a body cap and thin aluminium

panel (beer can) with 0.3mm hole was stuck inside of the hole.

Utterly funny accidental discovery was, a body cap of  A7 can

be used on Nikon body, if it was inserted off 180 degree. = so,

the test of this pinhole was done by a D810 body while pulling

the Ai-coupling lever. —– Then, another coincidence, I saw a

good second-hand  A7R in a camera shop = what a convenient

timing = I bought it — by trading the Olympus OM-D away

(because the Olympus body seems to be falling apart.)

Therfore, those test shot was made by a SONY  A7R, on the

way to see my friend.  😀

Alpha 7(2)-DSC02037

Alpha 7(3)-DSC02038

Alpha 7(4)-DSC02044

Alpha 7(5)-DSC02042

Some thing very remarkable was that all of those photos were

made almost automatic = camera has been set to AUTO and

without me changing ISO, Color balance etc, nothing, but just

aim and click. (the best of all, I could click while seeing

the view finder image.)  (It seemed, ISO was set 6400,

shutter speed were about 1/15~1/60 though,

I hate the Shutter nois, and the color)

Alpha 7(6)-DSC02054

Alpha 7(7)-001

Alpha 7(8)-DSC02057

Alpha 7(9)-DSC02063

Alpha 7(10)-DSC02071

On coincidence, I started to make the Pinhole Photo on this  A7R. 

— Even funnier discovery I made was, that the Olympus’ old

OM body cap fit to the  A7 body if it was inserted 180 degree

off direction = I don’t need to order and wait a month to get it.

(Body cap or thin (and cheap) adapter is the base to make “Things”)

Alpha 7(11)-001

So, first of all, my own pinhole was tested on a OM body cap while

the beer can panel was placed on the bottom of the body cap.

(Body cap penetrating 4mm into the  A7R = its mean 18mm

flange back – 4mm = 14mm ! — This pinhole can make 14mm

ultra-wide lens effect ! —– Well, in theory.   😀 )

Alpha 7(12)-DSC02082

So, this IS the 14mm wide pinhole image ! —– though,

with the Cosine Rule, light fall off is such significant, image

became round.  “Like Pinhole camera”  Ha ha ha.  😀

Alpha 7(13)-DSC02086

And this is the comparison, Nikon 16mm Fisheye lens’ view.

(Sound a bit patronizing, though, you have to see, what sort of

effort was paid to compensate the light fall off on the lens design. 

And, see the pinhole image above to see there is no distortion =

distortion was caused by the light-bending optics = Pinhole is

not bending the light (because they are not a lens)   😀

—– Well, I got a toy.   😀



One Response

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  1. OM Cap | Yoshizen's Blog said, on September 22, 2016 at 14:40

    […] Pinhole Machine and Toy camera lens.  […]

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