Pinhole lens information.
May 20, 2018 22:38:33 #
Only problem is dust. The commercial ones are sealed. See my photo. Not to knock do it yourself, I would not use it outside under field conditions.
May 20, 2018 22:46:28 #
I believe it is .25mm. That from Holga.I also have a stereo camera by Holga. Haven't done anything with it yet. It is 35 mm fi!m.
May 20, 2018 23:01:05 #
newtoyou wrote:
I believe it is .25mm. That from Holga.I also have a stereo camera by Holga. Haven't done anything with it yet. It is 35 mm fi!m.
It looks to me like the HL-C is not a pinhole lens but has an aperture of f8 with a focal length of 60mm. The Holga HPL-O is the pinhole lens with the 0.25mm aperture.
May 20, 2018 23:25:08 #
Davec1. You are correct. Thank you. I was under the impression that it was pinhole. No wonder the pictures looked better than what I saw on line.I have a true pinhole I have used on my AE1P.The pictures are more in line with pinhole look.
May 20, 2018 23:41:26 #
I just found and ordered the true pinhole for Ef Canon.$10.80 to my door.I will post pictures next week.
May 21, 2018 09:57:16 #
twowindsbear wrote:
Let's see some pix!!
Of the 'lens.'
On the camera.
And some you've shot with the combination.
Of the 'lens.'
On the camera.
And some you've shot with the combination.
Okay here are images of the lens, both on and off the camera, and dissected. Using just the f adapter gets me to a focal length of 55.5mm, but by using extension tubes I can extend that. In the available literature there is some differences on what the focal length should be for max sharpness out of a pinhole lens of a given aperture.
May 21, 2018 10:46:19 #
DaveC1 wrote:
Okay here are images of the lens, both on and off the camera, and dissected. Using just the f adapter gets me to a focal length of 55.5mm, but by using extension tubes I can extend that. In the available literature there is some differences on what the focal length should be for max sharpness out of a pinhole lens of a given aperture.
Cool!!!
Thanks for posting. How did you decide on the 0.35mm pinhole?
May 21, 2018 10:56:10 #
twowindsbear wrote:
Cool!!!
Thanks for posting. How did you decide on the 0.35mm pinhole?
Thanks for posting. How did you decide on the 0.35mm pinhole?
To be perfectly honest, I don't remember. This is one of those projects that was started, put on the back burner, restarted, put on the back burner, restarted. So its been a while since I bought the pinhole.
May 21, 2018 10:59:51 #
DaveC1 wrote:
To be perfectly honest, I don't remember. This is one of those projects that was started, put on the back burner, restarted, put on the back burner, restarted. So its been a while since I bought the pinhole.
I do understand - perfectly!
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