Muttonbird Island - Pinhole

Greenspeed
Posts: 64
Joined: 28 Mar 2013, 14:54

Muttonbird Island - Pinhole

Postby Greenspeed » 14 May 2015, 21:25

Been a while since I took my last pinhole shot (7 - 8 years ago). The large format forum peaks my interest, and took these set last weekend.
Set distance to approx. 75mm focal length, exposed for 30 sec. Kodak T max 100.


Image

Image

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RoganJosh
Posts: 226
Joined: 29 Aug 2012, 11:26

Re: Muttonbird Island - Pinhole

Postby RoganJosh » 16 May 2015, 01:33

How'd you manage photos this sharp with a pinhole?

Greenspeed
Posts: 64
Joined: 28 Mar 2013, 14:54

Re: Muttonbird Island - Pinhole

Postby Greenspeed » 16 May 2015, 09:17

RoganJosh wrote:How'd you manage photos this sharp with a pinhole?


Hi RJ,
The pinhole is 0.4mm. I am pleasantly surprised too how sharp they turned out.
My exposure reading for the light condition was 11 sec after reciprocal failure taken into account.
I exposed them for 30 sec regardless, just to be sure. I think any longer, the image will soften due to diffraction.
So to answer your question, I really don't know (yet). Will try it again to see whether I get consistent results.

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RoganJosh
Posts: 226
Joined: 29 Aug 2012, 11:26

Re: Muttonbird Island - Pinhole

Postby RoganJosh » 17 May 2015, 02:03

I've honestly never seen pinhole photos this sharp before. The smaller and cleaner the pinhole the better from what I remember, so it must be well made I guess. I can still see some trademark softness and glow here and there which is nice.

Greenspeed
Posts: 64
Joined: 28 Mar 2013, 14:54

Re: Muttonbird Island - Pinhole

Postby Greenspeed » 17 May 2015, 09:32

Hi RJ,
The pinhole was a Canon EOS camera body cap. I since modified it to fit onto a lens board. I have read the trick is to make sure there are no reflective areas on the pinhole that will further scatter the light. Mine is almost matt black, apart from a tiny area where the pinhole is.

Image

I went out just before sunset. This was exposed much longer. Adjusted contrast and cleaning up dust spots.

Sawtell Headland - Pinhole Photography
Taken 10 minutes before sunset. Exposed for 3 minutes. Set focal length to 65mm (approx. 24mm in 35mm format).
Kodak T Max 100 4 x 5 film; Epson V700 - negative sandwiched between anti-newton glasses.


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