Pinhole Shots--literally--per Tom's Request

[Brian Moore]

Holga 120 WPC (Wide Angle Pinhole Camera)--Shutter closed.

Holga 120 WPC--Shutter open

Holga 120 WPC--Shutter open, back removed

 

[Pete Askew]

Thanks Brian. That is an interesting looking device. By the look of it, you can fit different size pinholes. Is that true? Is the shutter a simple slide or a leaf shutter (I think I can see a couple of lines on it). Thanks for posting these.

 

[Thomas brookes]

Thank you Brian. I know it might seem strange to ask you for pics of a pinhole but it has helped alot in the quest of improvement. The pinhole and shutter mechanism on yours are all matte black on the front and back. Something I had completely over looked as the inside of mine I had left shiny.

Now thinking about it as the light hits the sensor it also reflects on the the shiny side giving me a " this is the voice of the misterons" type ring effect all over the image . I think that must be why.

Bad image I know but it's a pic of the screen.

So a sharper hole and matte finish on the back side is what I'll try next.

I literally have been learning all of this over a couple of weeks so bear whith me Brian if my questions seem a bit stupid.

Thanks for your help matey.

 

[Pete Askew]

That's exactly right Tom. And probably what you are seeing is actually a diffraction pattern, hence the concentric rings.

Scientific, C.C. Jones

 

[Brian Moore]

you can fit different size pinholes

Its not designed for that Pete. It's just designed to maintain the one size pinhole. You could modify it yourself for a different size pinhole, but I think you might be shooting yourself in the foot, since the pinhole size is supposed to be optimized for the distance between the lens and the film.

Is the shutter a simple slide or a leaf shutter

It's just a slide, Pete.

so bear whith me Brian if my questions seem a bit stupid

Absolutely, Tom. I'm no expert, but I'll help where I can.

And yes,...I'd recommend matte black finish over the bright bits of your homemade pinhole mechanism.

 

[Thomas brookes]

That link is very interesting Pete. Thanks.

 

[Pete Askew]

Wasn't thinking straight there Brian - too early!

 

[Brian Moore]

Wasn't thinking straight there

Nae bother Pete. I do it myself all the time.

 

[Kev Pugh]

Ah Holga ,I have the standard Holga Pin hole 0.25mm f192 really should follow your example Brian use it for the reason I bought it.

 

[Brian Moore]

Get oot ther intae the "snae" and dae it Kev, ya auld Sassenach!

 

[Hamish Gill]

Ignore my request in the other thread ... I found this now ...
Sorry Im so behind with posts